Relevant bibliographies by topics / Polymer Derived Ceramics

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Polymer Derived Ceramics'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2025

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Journal articles on the topic "Polymer Derived Ceramics"

1

Chu, Zengyong. "Editorial - Polymer-Derived Ceramics (PDCs)." Open Materials Science Journal 6, no. 1 (April 20, 2012): 22. http://dx.doi.org/10.2174/1874088x01206010022.

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Polymer-derived ceramics (PDCs) are the ceramics derived from preceramic polymers by a pyrolysis process, which makes them much different from those by traditional sintering techniques. The PDCs present a growing interest in the ceramic science for their much suitability in (i) elaborating complex forms (fibers, films, porous ceramics, etc...), (ii) developing ceramic micro/nanostructures, (iii) controlling ultimate compositions and (iv) producing amorphous ceramics stable at ultra-high temperatures. The most attractive point of the PDCs lies in the tailoring the complex microstructure and functional properties easily with the aid of molecular design and polymer synthesis. To some extent, their life energy is rooted in the polymers. In this special issue, papers were organized from a viewpoint of the effect of polymer structures on the functional properties of the PDCs.
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Fu, Shengyang, Min Zhu, and Yufang Zhu. "Organosilicon polymer-derived ceramics: An overview." Journal of Advanced Ceramics 8, no. 4 (December 2019): 457–78. http://dx.doi.org/10.1007/s40145-019-0335-3.

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AbstractPolymer-derived ceramics (PDCs) strategy shows a great deal of advantages for the fabrication of advanced ceramics. Organosilicon polymers facilitate the shaping process and different silicon-based ceramics with controllable components can be fabricated by modifying organosilicon polymers or adding fillers. It is worth noting that silicate ceramics can also be fabricated from organosilicon polymers by the introduction of active fillers, which could react with the produced silica during pyrolysis. The organosilicon polymer-derived ceramics show many unique properties, which have attracted many attentions in various fields. This review summarizes the typical organosilicon polymers and the processing of organosilicon polymers to fabricate silicon-based ceramics, especially highlights the three-dimensional (3D) printing technique for shaping the organosilicon polymer- derived ceramics, which makes the possibility to fabricate silicon-based ceramics with complex structure. More importantly, the recent studies on fabricating typical non-oxide and silicate ceramics derived from organosilicon polymers and their biomedical applications are highlighted.
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Savitri, Afridha Cita, Laely Septiya Wati, Nanda Nanda, Navila Nurliani, Maya Erliza Anggraeni, and Marvin Horale Pasaribu. "Article Review: Organosilicon-Based Ceramic Innovation: Polymer-Derived Ceramics (PDCs)." Nusantara Journal of Science and Technology 1, no. 1 (May 30, 2024): 40–54. http://dx.doi.org/10.69959/nujst.v1i1.10.

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Innovation and modern methods in ceramic production, as a transition from conventional/traditional methods, are needed to improve production efficiency and quality. One innovation in the ceramic industry is the polymer-derived ceramic (PDC) technology with the utilization of organosilicon compounds. PDCs are ceramics derived from preceramic organosilicon polymer precursors, which are generally divided into polysiloxane, polycarbosiloxane, polycarbosilane, polysilycarbodimiides, polysilazane, polyborosilazanes, polyborosilanes, and polyborosiloxanes. The transformation of organosilicon polymers into ceramics is carried out through four stages: shaping, cross-linking, pyrolysis, and ceramization. PDCs have high-temperature resistance properties, making them suitable for various applications in extreme environments. The forms of PDC applications are as semiconductors, sensors, coating/membranes, and fibers.
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Sarraf, Fateme, Sergey V. Churakov, and Frank Clemens. "Preceramic Polymers for Additive Manufacturing of Silicate Ceramics." Polymers 15, no. 22 (November 8, 2023): 4360. http://dx.doi.org/10.3390/polym15224360.

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The utilization of preceramic polymers (PCPs) to produce both oxide and non-oxide ceramics has caught significant interest, owing to their exceptional characteristics. Diverse types of polymer-derived ceramics (PDCs) synthesized by using various PCPs have demonstrated remarkable characteristics such as exceptional thermal stability, resistance to corrosion and oxidation at elevated temperatures, biocompatibility, and notable dielectric properties, among others. The application of additive manufacturing techniques to produce PDCs opens up new opportunities for manufacturing complex and unconventional ceramic structures with complex designs that might be challenging or impossible to achieve using traditional manufacturing methods. This is particularly advantageous in industries like aerospace, automotive, and electronics. In this review, various categories of preceramic polymers employed in the synthesis of polymer-derived ceramics are discussed, with a particular focus on the utilization of polysiloxane and polysilsesquioxanes to generate silicate ceramics. Further, diverse additive manufacturing techniques adopted for the fabrication of polymer-derived silicate ceramics are described.
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He, Jiabei, Mengshan Song, Kaiyun Chen, Dongxiao Kan, and Miaomiao Zhu. "Polymer-Derived Ceramics Technology: Characteristics, Procedure, Product Structures, and Properties, and Development of the Technology in High-Entropy Ceramics." Crystals 12, no. 9 (September 13, 2022): 1292. http://dx.doi.org/10.3390/cryst12091292.

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Ceramics have become indispensable materials for a wide range of industrial applications due to their excellent properties. However, the traditional preparation of ceramic materials is often time-consuming and involves high sintering temperatures. These result in considerable energy consumption and high production costs, which limit the application of these materials in some industries. This paper focuses on the advent of polymer-derived ceramics (PDCs) technology, which enabled the application of ceramics to fibers, composites, coatings, and films, mainly due to the excellent design, process, and low-temperature ceramic properties. We review and evaluate the important research progress made in polymer-derived ceramics technology in recent years and discuss its recent development into high-entropy ceramics. The development of polymer-derived ceramics technology in the field of high-entropy ceramics has broad research prospects, which can greatly improve the understanding and design of high-entropy materials and accelerate their application in the industrial field.
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Vakifahmetoglu, Cekdar, Damla Zeydanli, and Paolo Colombo. "Porous polymer derived ceramics." Materials Science and Engineering: R: Reports 106 (August 2016): 1–30. http://dx.doi.org/10.1016/j.mser.2016.05.001.

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Kroll, Peter. "Modelling polymer-derived ceramics." Journal of the European Ceramic Society 25, no. 2-3 (January 2005): 163–74. http://dx.doi.org/10.1016/j.jeurceramsoc.2004.07.012.

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Greil, P. "Polymer Derived Engineering Ceramics." Advanced Engineering Materials 2, no. 6 (June 2000): 339–48. http://dx.doi.org/10.1002/1527-2648(200006)2:6<339::aid-adem339>3.0.co;2-k.

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Wen, Qingbo, Fangmu Qu, Zhaoju Yu, Magdalena Graczyk-Zajac, Xiang Xiong, and Ralf Riedel. "Si-based polymer-derived ceramics for energy conversion and storage." Journal of Advanced Ceramics 11, no. 2 (January 11, 2022): 197–246. http://dx.doi.org/10.1007/s40145-021-0562-2.

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AbstractSince the 1960s, a new class of Si-based advanced ceramics called polymer-derived ceramics (PDCs) has been widely reported because of their unique capabilities to produce various ceramic materials (e.g., ceramic fibers, ceramic matrix composites, foams, films, and coatings) and their versatile applications. Particularly, due to their promising structural and functional properties for energy conversion and storage, the applications of PDCs in these fields have attracted much attention in recent years. This review highlights the recent progress in the PDC field with the focus on energy conversion and storage applications. Firstly, a brief introduction of the Si-based polymer-derived ceramics in terms of synthesis, processing, and microstructure characterization is provided, followed by a summary of PDCs used in energy conversion systems (mainly in gas turbine engines), including fundamentals and material issues, ceramic matrix composites, ceramic fibers, thermal and environmental barrier coatings, as well as high-temperature sensors. Subsequently, applications of PDCs in the field of energy storage are reviewed with a strong focus on anode materials for lithium and sodium ion batteries. The possible applications of the PDCs in Li-S batteries, supercapacitors, and fuel cells are discussed as well. Finally, a summary of the reported applications and perspectives for future research with PDCs are presented.
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Zeschky, J. "Preceramic polymer derived cellular ceramics." Composites Science and Technology 63, no. 16 (December 2003): 2361–70. http://dx.doi.org/10.1016/s0266-3538(03)00269-0.

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Dissertations / Theses on the topic "Polymer Derived Ceramics"

1

Hill, Arnold Hill. "PRODUCTION OF BULK CERAMIC SHAPES FROM POLYMER DERIVED CERAMICS." Master's thesis, University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4248.

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A method has been developed to produce bulk ceramic components from a class of ceramics known as polymer derived ceramics. In the past polymer derived ceramics have been limited to thin film applications or in the fabrication of MEMS devices. The reason being that when the polymer is into a ceramic, large quantities of gas are generated which produce internal pressure that fractures the ceramic components. The method developed here solves that issue by casting into the polymer a 3 dimensional network of polymer fibers in the form of a foam which, during pyrolysis, burns out and leaves a network of open channels that allows decomposition gases to escape thus preventing pressure from building up. The inclusion of the polymer foam allows for the formation of strong plastic like green bodies which can be machined into any shape. The green bodies are then pyrolized into ceramic components. This process allows for the simple and inexpensive fabrication of complex ceramic components that have the potential to replace current components that are made with traditional methods.
M.S.M.S.E.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Materials Science & Engr MSMSE
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2

xu, weixing. "POLYMER-DERIVED CERAMICS: ELECTRONIC PROPERTIES AND APPLICATION." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4202.

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In this work, we studied the electronic behavior of polymer-derived ceramics (PDCs) and applied them for the synthesis of carbon nanotube reinforced ceramic nanocomposites and ceramic MEMS (Micro-Electro-Mechanical Systems) structures. Polymer-derived SiCN ceramics were synthesized by pyrolysis of a liquid polyureasilazane with dicumyl peroxide as thermal initiator. The structural evolution during pyrolysis and post-annealing was studied using FTIR, solid state NMR and Raman. The results revealed that the resultant ceramics consisted of SiCxNx-4 as major building units. These units were connected with each other through C-C/C=C bonds or by shearing N/C. The amount of sp2 free carbon strongly depends on composition and processing condition. Electron paramagnetic resonance (EPR) was used to investigate electronic structure of PDCs; the results revealed that the materials contain unpaired electron centers associated with carbons. Electronic behavior of the SiCN ceramics was studied by measuring their I-V curves, temperature dependence of d.c.-conductivities and impendence. The results revealed that the SiCN ceramics exhibited typical amorphous semiconductor behavior, and their conductivity varied in a large range. The results also revealed that the materials contain more than one phase, which have the different electronic behavior. We explored possibility of using polymer-derived ceramics to make ceramic MEMS for harsh environmental applications with a lithography technique. The cure depth of the polymer precursor was measured as a function of UV intensity and exposure time. The experimental data was compared with the available theoretical model. A few typical SiCN parts were fabricated by lithography technique. We also prepared carbon nanotube reinforced ceramic nanocomposites by using PDC processing. The microstructures of the composites were characterized using SEM and TEM; the mechanical properties were studied characterized using nanoindentation. The significant improvement in mechanical properties was observed for the nanocomposites.
Ph.D.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Materials Science and Engineering
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3

Chen, Yaohan. "Structure and Properties of Polymer-Derived SiBCN Ceramics." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5164.

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Polymer-derived ceramics (PDCs) are a unique class of multifunctional materials synthesized by thermal decomposition of polymeric precursors. Due to their unique and excellent properties and flexible manufacturing capability, PDC is a promising technology to prepare ceramic fibers, coatings, composites and micro-sensors for high-temperature applications. However, the structure-property relationships of PDCs have not been well understood. The lack of such understandings drastically limited the further developments and applications of the materials. In this dissertation, the structure and properties of amorphous polymer-derived silicon carbonitride (SiCN) and silicoboron carbonitride (SiBCN) have been studied. The SiCN was obtained using commercially available polysilazane as pre-ceramic precursor, and the SiBCN ceramics with varied Si-to-B ratio were obtained from polyborosilazanes, which were synthesized by the hydroboration and dehydrocoupling reaction of borane and polysilazane. The structural evolution of polymer-derived SiCN and SiBCN ceramics from polymer to ceramics was investigated by NMR, FTIR, Raman, EPR, TG/DTA, and XRD. The results show a phase-separation of amorphous matrix and a graphitization of "free" carbon phase, and suggest that the boron doping has a great influence on the structural evolution. The electric and dielectric properties of the SiCN and SiBCNs were studied by I-V curves, LCR Meter, and network analyzer. A new electronic conduction mechanism and structure model has been proposed to account for the relationships between the observed properties and microstructure of the materials. Furthermore, the SiBCN ceramics showed the improved dielectric properties at characterization temperature up to 1300 [degrees]C, which allows the fabrication of ultrahigh-temperature wireless microsensors for extreme environments.
ID: 031001462; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Title from PDF title page (viewed July 8, 2013).; Thesis (Ph.D.)--University of Central Florida, 2012.; Includes bibliographical references (p. 150-170).
Ph.D.
Doctorate
Materials Science Engineering
Engineering and Computer Science
Materials Science and Engineering
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4

wei, yun. "SYNTHESIS AND CHARACTERIZATION OF POLYMER-DERIVED POROUS SICN CERAMICS." Master's thesis, University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3566.

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The synthesis and characterization of porous SiCN ceramics produced by the method of polymer-derived ceramics were studied in this work. The polymer-to-ceramic conversion technique is a novel revolution in the methods for fabricating porous materials with controlled morphologies and tailored properties. The porous SiCN ceramics can be successfully prepared from thermal decomposition of polymeric precursors (polysilazane) and the pore former (polyvinyl alcohol (PVA)). The fabrication procedures involved the mixing of the pre-ceramic precursor with appropriate concentration of the PVA, curing, pyrolysis and subsequent PVA removal, leaving pores in the ceramic matrix. The material obtained revealed a homogeneous amorphous microstructure consisting of Si, C and N elements. The effects of the concentration and the particle size of PVA on the bulk density, open porosity, line shrinkage, microstructure, pore size, permeability, mechanical behavior, oxidation behavior and thermal stability were examined in this thesis. An increase in both concentration and particle size of PVA contribute to a decrease in the bulk density and an increase in the open porosity and line shrinkage. The morphology development, in particular, was investigated by scanning electron microscopy (SEM). The properties in terms of the pore size and permeability were measured by the water expulsion method. The mechanical behavior of the porous SiCN ceramic was characterized by the three- point bending strength test, thermal shock strength test and hertzian indentation strength test. The flexural strength and hertzian indentation strength of these porous ceramics at room temperature decrease with an increase in porosity. However, the flexural strength after thermal shock was significantly improved by increasing the temperature change. The oxidation behavior and thermal stability of porous SiAlCN ceramics were also explored by the mass change versus oxidation time and temperature. The phase evolution at different temperatures was also investigated by XRD analysis.
M.S.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Materials Science & Engr MSMSE
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5

Santhosh, Balanand. "Thermal properties of polymer derived Si-O-C-N ceramics." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/267913.

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The main objective of the thesis is to study the thermal properties of Si-based polymer derived ceramics (PDCs) at elevated temperatures and to classify the main factors affecting the thermal transport through these ceramics. The polymer derived ceramics with the chemistry Si- O-C-N were prepared starting from commercial polycarbosilane, polysiloxane, and polysilazane precursors. These precursors are cross-linked at room temperature to obtain the preceramic, followed by controlled pyrolysis (at different temperatures ranging from 1200 oC to 1800 oC in argon, nitrogen or carbon-di-oxide atmospheres), to get the final ceramic. The first part of the thesis discusses on development and studies of dense polymer derived thin disks having a basic chemistry, Si-C, Si-O- C, and, Si-C-N-O, developed via a casting technique followed by specific pyrolysis cycles. Having a thickness in the range of 100 μm- 300 μm, these ceramic disks were studied to be nanocrystalline/amorphous at least up to a temperature of 1400 oC and were found to have a significant amount of Cfree phase existing in them along with the intended chemistry. The high-temperature thermal properties were primarily investigated on ceramics prepared at a pyrolysis temperature of 1200 oC (ceramic still in nanocrystalline/amorphous glassy phase). The disks were found to have very low expansion coefficients (CTE) measured up to ~900 oC and the thermal diffusivity (k) and thermal conductivity (l) of these disks were also measured. An attempt to understand the influence of the different phases in a SiOC ceramic (mainly the Cfree phase, studied by enriching the carbon percentages using DVB) in determining the final thermal properties was also conducted. The influence of carbon enrichment on the mechanical properties of these disks is also studied as a sub-part of this work. The second part of the work deals with testing the possibility to use these ceramics for high-temperature insulation applications. ‘Reticulated’ ceramic foams of relatively same chemistries as that of the disks were prepared by a template replica approach, using polyurethane (PU) foams (more open-celled to more closed-celled types of PU foams were used in the study) as the template. Porous structures having densities ranging from as low as 0.02 g.cm-3 to 0.56 g.cm-3 and with a porosity ~ 80 % to ~99% were prepared and tested. The developed foams showed excellent thermal stability up to a temperature of 1400 oC and possessed very low thermal expansion. The thermal conductivity measured on them at RT gave values in the range 0.03 W.m-1.K-1- 0.25 W.m-1.K-1. A Gibson-Ashby modeling approach to explain the thermal conductivity of the porous ceramics was also attempted. The developed foams were also found to be mechanically rigid. In a nutshell, the thesis work studies the thermal properties of Si-O-C- N ceramics in detail and probes into the possibility to develop these class of Si-O-C-N ceramics into promising high-temperature insulation material.
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Santhosh, Balanand. "Thermal properties of polymer derived Si-O-C-N ceramics." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/267913.

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The main objective of the thesis is to study the thermal properties of Si-based polymer derived ceramics (PDCs) at elevated temperatures and to classify the main factors affecting the thermal transport through these ceramics. The polymer derived ceramics with the chemistry Si- O-C-N were prepared starting from commercial polycarbosilane, polysiloxane, and polysilazane precursors. These precursors are cross-linked at room temperature to obtain the preceramic, followed by controlled pyrolysis (at different temperatures ranging from 1200 oC to 1800 oC in argon, nitrogen or carbon-di-oxide atmospheres), to get the final ceramic. The first part of the thesis discusses on development and studies of dense polymer derived thin disks having a basic chemistry, Si-C, Si-O- C, and, Si-C-N-O, developed via a casting technique followed by specific pyrolysis cycles. Having a thickness in the range of 100 μm- 300 μm, these ceramic disks were studied to be nanocrystalline/amorphous at least up to a temperature of 1400 oC and were found to have a significant amount of Cfree phase existing in them along with the intended chemistry. The high-temperature thermal properties were primarily investigated on ceramics prepared at a pyrolysis temperature of 1200 oC (ceramic still in nanocrystalline/amorphous glassy phase). The disks were found to have very low expansion coefficients (CTE) measured up to ~900 oC and the thermal diffusivity (k) and thermal conductivity (l) of these disks were also measured. An attempt to understand the influence of the different phases in a SiOC ceramic (mainly the Cfree phase, studied by enriching the carbon percentages using DVB) in determining the final thermal properties was also conducted. The influence of carbon enrichment on the mechanical properties of these disks is also studied as a sub-part of this work. The second part of the work deals with testing the possibility to use these ceramics for high-temperature insulation applications. ‘Reticulated’ ceramic foams of relatively same chemistries as that of the disks were prepared by a template replica approach, using polyurethane (PU) foams (more open-celled to more closed-celled types of PU foams were used in the study) as the template. Porous structures having densities ranging from as low as 0.02 g.cm-3 to 0.56 g.cm-3 and with a porosity ~ 80 % to ~99% were prepared and tested. The developed foams showed excellent thermal stability up to a temperature of 1400 oC and possessed very low thermal expansion. The thermal conductivity measured on them at RT gave values in the range 0.03 W.m-1.K-1- 0.25 W.m-1.K-1. A Gibson-Ashby modeling approach to explain the thermal conductivity of the porous ceramics was also attempted. The developed foams were also found to be mechanically rigid. In a nutshell, the thesis work studies the thermal properties of Si-O-C- N ceramics in detail and probes into the possibility to develop these class of Si-O-C-N ceramics into promising high-temperature insulation material.
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Cox, Sarah. "Processing and Characterization of Continuous Basalt Fiber Reinforced Ceramic Matrix Composites Using Polymer Derived Ceramics." Master's thesis, University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6259.

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The need for high performance vehicles in the aerospace industry requires materials which can withstand high loads and high temperatures. New developments in launch pads and infrastructure must also be made to handle this intense environment with lightweight, reusable, structural materials. By using more functional materials, better performance can be seen in the launch environment, and launch vehicle designs which have not been previously used can be considered. The development of high temperature structural composite materials has been very limited due to the high cost of the materials and the processing needed. Polymer matrix composites can be used for temperatures up to 260°C. Ceramics can take much higher temperatures, but they are difficult to produce and form in bulk volumes. Polymer Derived Ceramics (PDCs) begin as a polymer matrix, allowing a shape to be formed and cured and then to be pyrolized in order to obtain a ceramic with the associated thermal and mechanical properties. The use of basalt in structural and high temperature applications has been under development for over 50 years, yet there has been little published research on the incorporation of basalt fibers as a reinforcement in the composites. In this study, continuous basalt fiber reinforced PDCs have been fabricated and tested for the applicability of this composite system as a high temperature structural composite material. The oxyacetylene torch testing and three point bend testing have been performed on test panels and the test results are presented.
M.S.M.S.E.
Masters
Materials Science Engineering
Engineering and Computer Science
Materials Science and Engineering
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8

Burghard, Zaklina. "Behaviour of glasses and polymer derived amorphous ceramics under contact stress." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11406707.

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JIANG, TAO. "ELECTRONIC PROPERTIES AND MICROSTRUCTURES OF AMORPHOUS SICN CERAMICS DERIVED FROM POLYMER PRECURSORS." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2988.

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Polymer-derived ceramics (PDCs) are a new class of high-temperature materials synthesized by thermal decomposition of polymeric precursors. These materials possess many unique features as compared with conventional ceramics synthesized by powder metallurgy based processing. For example, PDCs are neither amorphous nor crystalline. Instead, they possess nano-domain structures. Due to the direct chemical-to-ceramic processing, PDCs can be used for making components and devices with complex shapes. Thus, understanding the properties and structures of these materials are of both fundamental and practical interest. In this work, the structures and electronic behavior of polymer-derived amorphous silicon carbonitrides (SiCNs) were investigated. The materials were synthesized by pyrolysis of a commercially available liquid precursor. Ceramic materials with varied structures/properties were successfully synthesized by modifying the precursor and using different pyrolysis temperatures. The structures of the obtained materials were studied using XRD, solid state NMR, EPR, FTIR and Raman Spectroscope. The electronic behavior of the materials was investigated by measuring I-V curves, Hall effects, temperature dependent conductivity. The experiments were also performed to measure UV-Visible absorption and dielectric properties of the materials. This work leads to the following significant progresses: (i) developed quantitative technique for measuring free carbon concentration; (ii) achieved better understanding of the electronic conduction mechanisms and measured electronic structures of the materials for the first time; and (iii) demonstrated that these materials possess unusual dielectric behavior and provide qualitative explanations.
Ph.D.
Department of Mechanical, Materials and Aerospace Engineering
Engineering and Computer Science
Materials Science & Engr PhD
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10

Scarlete, Mihai. "Spectroscopic methods for the characterization of thin films of polymer-derived ceramics." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39994.

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Poly(methylsilane) (PMS) has been used as a precursor to form a variety of ceramic materials within the Si-C-N system. Special emphasis was placed on the synthesis of SiC, $ rm Si sb3N sb4$ and derived tertiary ceramic materials for use in semiconductor applications, mainly as thin films coated onto various substrates.
Detailed insight into the chemical transformations occurring during pyrolysis under inert (N$ sb2$, Ar) or reactive (NH$ sb3$) atmospheres was achieved by analysis of the layers coated on silicon single-crystal wafers. The oxidation of PMS and its transformation during pyrolysis into SiC were monitored by IR reflectance and transmission spectroscopy. The degree of the oxidation of PMS is not only a critical factor in determining the electronic properties of the final resulting materials, but is also a key factor in determining the pyrolysis mechanism. An important observation was the low-temperature ($ sim$200$ sp circ$C) Kumada rearrangement of the PMS to poly(cabosilane) (PCS). This reaction was evident at 200$ sp circ$C on silicon substrates, when the oxygen concentration in PMS was below 40 parts per million (ppm). Ultrathin layers of amorphous SiC (a-SiC) with thicknesses of $ sim$100 nm were obtained by deposition of the volatile species resulting from the thermal cracking of the precursor. The cracked-polymer vapor deposition (CP-VD) method allowed the synthesis of smooth (mirror-like) ceramic layers. The layers obtained by both CP-VD and spin-coating procedures exhibited resistivities in the range of $10 sp3-10 sp6 Omega$ cm and good adhesion properties onto the silicon substrates.
n-type SiC layers doped with nitrogen having a resistivity range suitable for Si/SiC heterojunctions in solar cells were also synthesized on silicon single-crystal wafers. A homogeneous doping procedure was developed that consists of reacting the Wurtz PMS prepolymer with NH$ sb3$ to form a "doping polymer". Partial pressure of NH$ sb3$ can enhance the rate of deposition of ceramics on cold substrates. In this case, CP-VD appears to combine some advantages of the two currently used procedures for growing thin films--i.e., a high deposition rate characteristic of pyrolysis of spin-coated films of precursors and good texture of the layers, characteristic of the chemical vapor deposition process (CVD).
The inclusion of higher concentrations of nitrogen into the ceramic material was studied during the synthesis of $ rm Si sb3N sb4$ by pyrolysis of PMS under pure NH$ sb3$. The analysis of the intermediate products resulting from the reaction of the precursor with NH$ sb3$ revealed that carbon loss occurred at temperatures below 600$ sp circ$C, and involves poly(carbosilazane) species. The stoichiometric 4:3 atomic ratio of N to Si is achieved below 500$ sp circ$C. A reaction path way is proposed in which only heterodehydrocoupling between Si-H and N-H groups occurs. This pathway is sufficient to explain the incorporation of excess nitrogen (compared to $ rm Si sb3N sb4$) usually observed in the intermediate pyrolysis products. Carbon loss is not directly related to nitrogen incorporation, thus the two processes are, at least partially, independent.
The effect of the thermal decomposition of NH$ sb3$, as an independent variable, on the carbon/nitrogen exchange process was studied. Deviations from thermodynamic equilibrium were related to dynamic conditions characterizing the flow regime.
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Books on the topic "Polymer Derived Ceramics"

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Colombo, Paolo, Rishi Raj, and Mrityunjay Singh, eds. Advances in Polymer Derived Ceramics and Composites. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470880630.

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Pacific Rim Conference on Ceramic and Glass Technology (8th 2009 Vancouver, B.C.). Advances in polymer derived ceramics and composites: A collection of papers presented at the 8th Pacific Rim Conference on Ceramic and Glass Technology, May 31-June 5, 2009, Vancouver, British Columbia. Edited by Colombo Paolo 1960-, Raj Rishi, and Singh M. (Mrityunjay). Hoboken, N.J: Wiley, 2010.

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United States. National Aeronautics and Space Administration., ed. Polysiloxanes derived from the controlled hydrolysis of tetraethoxysilane as precursors to silica for use in ceramic processing. [Washington, D.C: National Aeronautcs and Space Administration, 1990.

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United States. National Aeronautics and Space Administration., ed. Approaches to polymer-derived CMC matrices. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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United States. National Aeronautics and Space Administration., ed. Approaches to polymer-derived CMC matrices. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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C, Goldsby Jon, DiCarlo James A, and United States. National Aeronautics and Space Administration., eds. Tensile creep and stress-rupture behavior of polymer derived SiC fibers. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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C, Goldsby Jon, DiCarlo James A, and United States. National Aeronautics and Space Administration., eds. Tensile creep and stress-rupture behavior of polymer derived SiC fibers. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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Singh, Mrityunjay, Paolo Colombo, and Rishi Raj. Advances in Polymer Derived Ceramics and Composites. Wiley & Sons, Incorporated, John, 2010.

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Singh, Mrityunjay, Paolo Colombo, and Rishi Raj. Advances in Polymer Derived Ceramics and Composites. Wiley & Sons, Incorporated, John, 2010.

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Polymer Derived Ceramics From Nanostructure To Applications. Destech Publications, 2009.

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Book chapters on the topic "Polymer Derived Ceramics"

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Ionescu, Emanuel. "Polymer-Derived Ceramics." In Ceramics Science and Technology, 457–500. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2014. http://dx.doi.org/10.1002/9783527631940.ch49.

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Ionescu, Emanuel. "Polymer-Derived Ceramics." In Ceramics Science and Technology, 457–500. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527631957.ch18.

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Packirisamy, S., K. J. Sreejith, Deepa Devapal, and B. Swaminathan. "Polymer-Derived Ceramics and Their Space Applications." In Handbook of Advanced Ceramics and Composites, 975–1080. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-16347-1_31.

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Shanmugam, Packirisamy, Sreejith Krishnan, Deepa Devapal, and Swaminathan Balasubramanian. "Polymer-Derived Ceramics and Their Space Applications." In Handbook of Advanced Ceramics and Composites, 1–107. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-73255-8_31-1.

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Packirisamy, S., K. J. Sreejith, Deepa Devapal, and B. Swaminathan. "Polymer-Derived Ceramics and Their Space Applications." In Handbook of Advanced Ceramics and Composites, 1–107. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-73255-8_31-2.

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Pollock, J. T. A., M. J. Kenny, L. S. Wielunski, and M. D. Scott. "Ion Irradiation of Polymer-Derived Graphitic Carbons." In Structure-Property Relationships in Surface-Modified Ceramics, 321–30. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0983-0_21.

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Cook, R., C. Klein, and H. Armstrong. "Refractory Adhesives for Bonding of Polymer Derived Ceramics." In Ceramic Transactions Series, 167–71. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119407270.ch17.

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Colombo, Paolo, Gabriela Mera, Ralf Riedel, and Gian Domenico Sorarù. "Polymer-Derived Ceramics: 40 Years of Research and Innovation in Advanced Ceramics." In Ceramics Science and Technology, 245–320. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2014. http://dx.doi.org/10.1002/9783527631940.ch57.

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Colombo, Paolo, Gabriela Mera, Ralf Riedel, and Gian Domenico Sorarù. "Polymer-Derived Ceramics: 40 Years of Research and Innovation in Advanced Ceramics." In Ceramics Science and Technology, 245–320. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527631971.ch07.

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Konegger, Thomas, Jessica Torrey, Octavio Flores, Tobias Fey, Bruno Ceron-Nicolat, Günter Motz, Franziska Scheffler, Michael Scheffler, Peter Greil, and Rajendra K. Bordia. "Ceramics for Sustainable Energy Technologies with a Focus on Polymer-Derived Ceramics." In Novel Combustion Concepts for Sustainable Energy Development, 501–33. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-2211-8_22.

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Conference papers on the topic "Polymer Derived Ceramics"

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Wang, Xiaolin, Suraj C. Zunjarrao, Hui Zhang, and Raman P. Singh. "Advanced Process Model for Polymer Derived Ceramic Processing." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13824.

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Pyrolysis of preceramic polymers allows a new type of ceramic materials to be processed at a relatively low temperature. The ceramics via polymer pyrolysis display a number of exceptional mechanical, thermal and chemical properties, including high thermal stability, high oxidation/creep resistance, etc. Moreover, they offer better geometrical accuracy compared to conventional ceramics. In addition, thermal induced pyrolysis of organometallic polymer precursors offers the possibility of net shape manufacturing at a lower temperature compared to traditional powder sintering process. The pyrolysis of polymer precursors involves curing of polymer precursors in which the polymer undergoes cross-linking to form a green body, followed by a pyrolysis stage that involves the formation of amorphous SiC and crystallization of SiC at a higher temperature. The source material changes phase and composition continuously during polymer pyrolysis based ceramic process. Chemical reactions and transport phenomena vary accordingly. To obtain ceramics with high uniformity of microstructure and species without crack, transport phenomena in material processing needs to be better understood and a process model needs to be developed to optimize the fabrication process. In this paper, a numerical model is developed, including heat and mass transfer, polymer pyrolysis, species transport, chemical reactions and crystallization. The model is capable of accurately predicting the polymer pyrolysis and chemical reactions of the source material. Pyrolysis of a sample with certain geometry is simulated. The effects of heating rate, particle size and initial porosity on porosity evolution, mass loss and reaction rate are investigated. Optimal conditions for the manufacturing are also proposed.
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Ma, Zhichun, Linan An, Xuyuan Chen, and A. Hays. "Polymer-derived ceramics-based fuel atomizers." In Photonics Asia 2004, edited by Zhichun Ma, Guofan Jin, and Xuyuan Chen. SPIE, 2004. http://dx.doi.org/10.1117/12.581188.

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Bharadwaj, Lavanya, Abhijeet Dhamne, Linan An, Barry Fookes, Jay Kapat, and Louis Chow. "Polymer-Derived Si-Al-C-N-O Ceramics for High Temperature Applications." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38561.

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Polymer-derived ceramics are a new class of materials synthesized by thermal decomposition of polymeric precursors. The resultant materials are amorphous alloys of silicon, carbon, and nitrogen, which can be converted to crystalline materials by annealing at higher temperatures. This novel chemical-to-ceramic route offers a unique opportunity to tailor the structures and compositions, therefore the properties, of the resultant materials by designing the chemistry of the precursors. In this paper we report the studies on synthesis and oxidation behavior of polymer-derived SiAlCN materials. The precursor was synthesized by mixing a polysilazane and aluminum isopropoxide. The mixture was then pyrolyzed at 1000°C in Ar/N2 to convert to SiAlCNO ceramics. The oxidation studies revealed that the SiAlCNO possesses a lower oxidation rate than SiCN. It is believed that the better oxidation resistance exhibited by SiAlCN is due to the oxide layer containing Al, which makes oxygen diffusion more difficult than in pure SiO2. The materials are promising for many high temperature applications, e.g. environmental barrier coatings, high temperature fibers, matrixes for composites, and even monolithic components.
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Wang, Yiguang, and Linan An. "Polymer Derived SiAlCN for Environmental Barrier Coatings." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68172.

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Silicon-based ceramics and composites are one of the most promising candidates for high temperature structural components in next generation gas turbines due to their excellent thermo-mechanical properties. However, these materials severely degraded when used in high temperature oxidizing environments, particularly, in the presence of corrosive species such as alkali elements or water vapor. Currently, the most promising approach with near-term benefits is to employ environmental barrier coatings (EBCs) that prevent direct contact between silicon-based materials and aggressive environments exist in turbine engines. Previous work on EBCs has primarily focused on using oxide coatings because oxides are in general more resistant to corrosive environments than Silicon-based ceramics. In this study, we propose to develop polymer-derived SiAlCN amorphous ceramics for EBC applications. Our research revealed that the oxidation rate of the SiAlCN ceramics is about 10 times lower than the lowest values observed on chemical vapor deposition (CVD) silicon carbide/nitride. Furthermore, the SiAlCN also exhibited good corrosion resistance to alkali salt at elevated temperatures.
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Mahmoudi, Mohammadreza, Scott R. Burlison, Salvador Moreno, and Majid Minary. "Freeform 3D-Printing of Pure Ceramics." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23429.

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Abstract Polymer derived ceramics (PDC’s) offer a unique opportunity to 3D-print ceramics; however, 3D printing of such polymers require it to be combined with specialized light-sensitive agents and layer-by-layer crosslinking using an optical beam due to their low viscosity. Here, three-dimensional printing of ceramics enabled by dispensing the preceramic polymer from a nozzle inside a yield stress fluid is being demonstrated. The printed parts are crosslinked in the same gel. After crosslinking process, the printed parts are taken out of the gel and prepared for high temperature pyrolysis process that converts the cured parts to ceramic. The specially designed gel was three orders of magnitude more viscous than the preceramic polymer at no shear, which provided a stable medium during the whole process for maintaining the shape of the printed material and prevented possible instabilities. The SEM images of the cross section of the specimens showed that the printed material was dense and without any apparent porosity or cracks. Statistical analysis on the mechanical properties of the printed preceramic polymer specimens revealed that the printed specimens had characteristic strength (∼257 MPa).
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Cui, T., G. Shao, L. An, W. Wang, Y. J. Chao, P. S. Lam, and A. Mendez-Torres. "Time and Temperature Dependent Property of a Sensor Candidate Material: Polymer Derived Ceramics (PDC)." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-29058.

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The piezoresistivity and the micro fabrication capability have made the polymer derived ceramics (PDCs) an excellent candidate material for high temperature sensors. In this study, it was found that PDCs also exhibit creep and stress relaxation properties. Its electric resistance may change with time under certain loading conditions. In addition, the creep/stress relaxation rate is sensitive to temperature. It is demonstrated that even PDC materials have been processed at high temperatures and formed ceramic structure, they retain certain polymeric characteristics. Due to the piezoresistivity properties of PDC and its resilience to harsh environment, in particular, the predicted resistance to radiation field, the PDC based sensors are ideal for use as sensing media that can be deployed to important to safety (ITS) structures in nuclear systems, such as cooling water system and coolant pumps in light water reactors (LWRs).
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Xu, Weixing, Jayanta Kapat, Louis C. Chow, Linan An, and Wenge Zhang. "The Potential of Electronic High Temperature Devices Based Upon Polymer Derived Ceramics." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68141.

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In this paper, we describe the potential use of polymer-derived ceramics (PDCs) for micro-sensors for high-temperature gas turbine applications. PDCs have several unique properties such as ease of microfabrication, excellent mechanical, materials and thermal properties, and tunable electrical conductivity. The electrical conductivity of PDCs with varied composition is measured as a function of temperature from room temperature upon to 700°C. Our results reveal that with suitable doping, the electrical conductivity could be controlled from insulating to semiconducting. Next, we measure the cure depth of the precursors as a function of UV intensity and exposure time. A model is developed to predict the cure depth as a function of photoinitiator concentration and light intensity. Good agreement between theory and experimental data is obtained. Finally, a few typical micro parts are fabricated by lithography technique.
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Chen, Qinnan, Ji'an Lin, Jinyang Li, Panhua Xu, Zhenyin Hai, and Daoheng Sun. "Phosphor film temperature sensor with polymer derived ceramics as high temperature binder." In Conference on Optical Sensing and Imaging Technology, edited by Yadong Jiang, Qunbo Lv, Bin Xue, Dengwei Zhang, and Dong Liu. SPIE, 2021. http://dx.doi.org/10.1117/12.2606904.

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Zunjarrao, Suraj C., Abhishek K. Singh, and Raman P. Singh. "Structure-Property Relationships in Polymer Derived Amorphous/Nano-Crystalline Silicon Carbide for Nuclear Applications." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89515.

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Silicon carbide (SiC) is a promising candidate for several applications in nuclear reactors owing to its high thermal conductivity, high melting temperature, good chemical stability, and resistance to swelling under heavy ion bombardment. However, fabricating SiC by traditional powder processing route generally requires very high temperatures for pressureless sintering. Polymer derived ceramic materials offer unique advantages such as ability to fabricate net shaped components, incorporate reinforcements and relatively low processing temperatures. Furthermore, for SiC based ceramics fabricated using polymer infiltration process (PIP), the microstructure can be tailored by controlling the processing parameters, to get an amorphous, nanocrystalline or crystalline SiC. In this work, fabrication of polymer derived amorphous and nano-grained SiC is presented and its application as an in-core material is explored. Monolithic SiC samples are fabricated by controlled pyrolysis of allylhydridopolycarbosilane (AHPCS) under inert atmosphere. Chemical changes, phase transformations and microstructural changes occurring during the pyrolysis process are studied as a function of the processing temperature. Polymer cross-linking and polymer to ceramic conversion is studied using infrared spectroscopy (FTIR). Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) are performed to monitor the mass loss and phase change as a function of temperature. X-ray diffraction studies are done to study the intermediate phases and microstructural changes. Variation in density is carefully monitored as a function of processing temperature. Owing to shrinkage and gas evolution during pyrolysis, precursor derived ceramics are inherently porous and composite fabrication typically involves repeated cycles of polymer reinfiltration and pyrolysis. However, there is a limit to the densification that can be achieved by this method and porosity in the final materials presents difficulties in interpreting “true” properties from bulk measurements. Hence, hardness and modulus measurements are carried out using instrumented nanoindentation to establish property–structure relationship for SiC derived from the polymer precursor. It is seen that the presence of nanocrystalline domains in amorphous SiC significantly influences the modulus and hardness.
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Cross, Tsali, Somuri Prasad, and Rishi Raj. "Friction and Wear Behavior of Silicon Carbonitride Processed From the Polymer-Derived Ceramic Route." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64022.

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Polymer derived ceramics (PDC’s) are processed from liquid organometallic precursors by cross-linking the polymers into infusible solids, followed by controlled pyrolysis. No previous work regarding their tribology has been reported. Further, the synthesis of PDC’s as thin films, and the role that the nanostructure plays on the mechanical properties has not been reported. The objective of this research was to evaluate the fundamental tribological behavior of polymer derived SiCN in both bulk and thin film form. Friction and wear evaluations were made on bulk materials and thin films using a Si3N4 ballon-disk linear wear tester at various contact pressures and in different environments that contained various amounts of humidity. The micro/nanostructure was characterized by FTIR, microRaman, and scanning electron microscopy. Bulk SiCN gave a low friction coefficient and good wear resistance in humid environments but showed significant fracture and gouging in dry environments at higher contact pressures. Although there is ambiguity regarding the tribology of the thin films there seems to be a dependence upon the nitrogen content within the materials derived from the polymeric stage. The future work will focus on optimizing processing conditions of thin films and investigating the role that nitrogen plays in both bulk and thin film SiCN materials.
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Reports on the topic "Polymer Derived Ceramics"

1

Peterson, Reuben James. Literature Review of Polymer Derived Ceramics. Office of Scientific and Technical Information (OSTI), May 2016. http://dx.doi.org/10.2172/1254934.

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Rajendra Bordia. Nanoscale Reinforced, Polymer Derived Ceramic Matrix Coatings. Office of Scientific and Technical Information (OSTI), July 2009. http://dx.doi.org/10.2172/1025560.

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Uhlmann, D. R. Microstructure of Ceramics Derived from Organo-Metallic Polymers. Fort Belvoir, VA: Defense Technical Information Center, March 1986. http://dx.doi.org/10.21236/ada190099.

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Raj, Rishi. Photo-Stereo Lithography System for Polymer Derived Ceramic Microsystems. Fort Belvoir, VA: Defense Technical Information Center, February 2004. http://dx.doi.org/10.21236/ada420403.

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Lara-Curzio, E. The Mechanics of Creep Deformation in Polymer Derived Continuous Fiber-Reinforced Ceramic Matrix Composites. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/777651.

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