Relevant bibliographies by topics / Micro- and nano-composite

Contents

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

Academic literature on the topic 'Micro- and nano-composite'

Author: Grafiati
Published: 3 June 2025
Last updated: 13 July 2025

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Journal articles on the topic "Micro- and nano-composite"

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Zhang, Lin, Bin Yang, Wen Zhuang Lu, and Guo Ping Ai. "Design of Nano/Micro-Structured Diamond Coating on Cemented Carbide." Key Engineering Materials 693 (May 2016): 554–59. http://dx.doi.org/10.4028/www.scientific.net/kem.693.554.

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The diamond coating can improve the performance and durability of cutting tool. To obtain the structure of nano/micro CVD diamond coating, the finite element analysis of nano/micro composite CVD diamond coating on boronized cemented carbide was carried on using ANSYS. The relationship between nanoand micron diamond layer thickness and coating fall off stress was simulated. The thickness of nanodiamond and the micron diamond layer was suggested for the nano/micro CVD diamond coating on boronized cemented carbide cutting tool.
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Senthilkumar, R., N. Arunkumar, and M. Manzoor Hussian. "Effects of Micro and Nano-Size Al2O3 Particle Reinforcement on Mechanical Behaviour of Extruded Aluminum Alloy Matrix Composite." Applied Mechanics and Materials 787 (August 2015): 617–21. http://dx.doi.org/10.4028/www.scientific.net/amm.787.617.

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Aluminum alloy (AA2014) matrix composites reinforced by different weight percentage of aluminum oxide (Al2O3) in micro and nano sizes were fabricated through powder metallurgy route followed by hot extrusion process. Seven different aluminium composites with varying percentages of nano and micron sized alumina particles varying from 1% to 10% were evaluated in addition to monolithic alloy. The microstructure of nano-composite and monolithic alloys were examined by optical microscope and scanning electron microscope (SEM) equipped with an energy dispersive X-ray analysis (EDAX). In addition, the effects of weight fraction of the reinforcement matrix on mechanical properties were evaluated. The results have indicated that, a significant improvement in hardness of the nano composite was found in case of nano-composite with 8% of micro Al2O3 and 2% of nano Al2O3 particles by the addition of reinforcement.
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Wu, Xinzhou, Hui Ren, and Qingjie Jiao. "Improved Combustion Performance of Fluororubber-Coated Micro-Nano Composite Aluminum Powder." Metals 13, no. 3 (2023): 556. http://dx.doi.org/10.3390/met13030556.

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In order to improve the reaction rate and reaction degree of aluminized explosives, the micro-nano composite aluminum powder was fabricated by a new method of in situ electro-explosion. The combustion performances of the composite aluminum powder were studied. The results showed that the micro-nano composite aluminum powder was like a “sea urchin structure” with many nano-sized powders around a single micro-sized aluminum particle. The heat of combustion was 25.67 MJ/kg at 3 MPa oxygen pressure, and the rising rate of pressure was particularly obvious. The ignition performance in an air environment was much better than the micro-sized aluminum powder. At the same time, the reaction process of the micro-nano composite aluminum powder was analyzed. The reaction can be divided into three stages, the decomposition of fluororubber between 500 and 600 °C, then melting, and the first step of the oxidation of aluminum powder occurred between 600 and 700 °C. In the third stage, the micro-nano composite aluminum powder reacted violently around 1000 °C and the released energy reached 3779 J/g. The micro-nano composite aluminum powder had excellent combustion performance and a good application prospect in high-power energy storage materials.
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Zhou, Yong Hui, Jun Zhao, and Xiao Bin Cui. "Cutting Performance and Tool Failure in Intermittent Turning Processes of an Al2O3-Based Micro-Nano-Composite Ceramic Tool." Materials Science Forum 723 (June 2012): 56–61. http://dx.doi.org/10.4028/www.scientific.net/msf.723.56.

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An Al2O3-based micro-nano-composite ceramic cutting tool material reinforced with (W, Ti)C micro-particles and Al2O3 micro-nano-particles was fabricated by using hot-pressing technique, the composite was denoted as AWT. The cutting performance, failure modes and mechanisms of the AWT micro-nano-composite ceramic tool were investigated via intermittent turning of hardened AISI 1045 steel (44~48 HRC) in comparison with those of an Al2O3/(W, Ti)C micro-composite ceramic tool SG-4 and a cemented carbide tool YS8. Worn and fractured surfaces of the cutting tools were characterized by scanning electron microscopy (SEM). The results of intermittent turning revealed that shock resistance of the AWT ceramic tool was higher than that of the SG-4 and YS8 tools at all the tested cutting speeds. The excellent shock resistance of the AWT composite ceramic tool was attributed to its synergistic strengthening/toughening mechanisms induced by the (W, Ti)C micro-particles and Al2O3 nano-particles.
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Hu, Haitao, Xiaohong Zhang, Dingping Zhang, Junguo Gao, Chunxiu Hu, and Yayun Wang. "Study on the Nonlinear Conductivity of SiC/ZnO/Epoxy Resin Micro- and Nanocomposite Materials." Materials 12, no. 5 (2019): 761. http://dx.doi.org/10.3390/ma12050761.

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To investigate the inhomogeneous distribution of electric fields in insulating equipment and components, five nonlinear-conductance composite materials based on epoxy resin (EP) (nano-SiC/EP, nano-ZnO/EP, micro-ZnO/EP, nano-SiC/ZnO/EP, and nano-micro-SiC/ZnO/EP), were prepared using nano-SiC, nano-ZnO, and micro-ZnO particles as fillers. The mass fractions of the inorganic fillers were 1, 3, and 5 wt%, respectively. The direct current (DC) voltage characteristics of the composites showed that the electrical conductivities and nonlinear coefficients of the composites utilizing single-filler types increased with increasing inorganic filler content. Under the same conditions, the conductivity and nonlinear coefficient of SiC/EP were both larger than those of the nano-ZnO/EP and micro-ZnO/EP. However, the nonlinear coefficient of the composites was significantly affected by the simultaneous addition of the two inorganic fillers, micro-ZnO and nano-SiC. When the content ratio of micro-ZnO to nano-SiC was 2:3, the nonlinear coefficient of the composite reached a maximum value of 3.506, significantly higher than those of the other samples. Compared with the nano-SiC/EP, micro-ZnO/EP and nano-ZnO/EP composites with 5 wt% inorganic filler, the nonlinear coefficient of the two-filler composite was greater by a factor of 0.82, 2.48, and 5.01, respectively.
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Pawar, Sarika P. "Micro and Nano Fiber Composite Coatings." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (2022): 5160–74. http://dx.doi.org/10.22214/ijraset.2022.44634.

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Abstract: Environmental friendly products are becoming popular and acceptable in industries due to the global limitation to the amount of volatile organic compounds (VOCs) released into the atmosphere. Low VOC compounds and technologies are also becoming a choice in the coatings and paint industry. Coatings can be made from water or solvent. In coatings from water, we use water as the solvent, therefore coating called water based coating and in the case of solvent-borne coatings, we used organic or inorganic compounds as solvents, therefore this coating called as solvent borne coating. Among all different types of solvents water is the greatest choice among these low VOC technologies for usage as a solvent to manufacture chemical compounds and Paints and coatings. because water is often recognized as a low-cost, safe, non-toxic, easily available and ecologically friendly solvent. Also nanomaterials is new field in research and development of material science . Materials can be one dimensional such as small particles, materials can be two dimensional such as fibres. Therefore in two-dimensional materials such as fibres ( micro and nanofibers) use in many different applications such as medical, composites, aerospace, Building constructions etc. Nanofiber has the advantage of high surface area to volume ratio hence to decrease the coating defects. micro and nanofibers should be incorporated inside the coating matrix. This way one can improve the properties of water-based coatings. Hence low VOC solvent water with high surface area fibre is becoming a trend in composite coating and nanotechnology in fibres. This review provides information on Composite coatings, distinct fibres used in coatings and their applications, also effects of different aspect ratio of fibres on properties of coatings
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Fan, Zhiwei, Liang Xu, Biyun Zhou, and Tao Chen. "Fabrication of Anti-Reflective Composite Structures on Inverted Pyramids Using Inductively Coupled Plasma Etching." Micromachines 16, no. 5 (2025): 503. https://doi.org/10.3390/mi16050503.

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The anti-reflective properties of silicon surfaces play a pivotal role in determining the light absorption efficiency of various silicon-based optoelectronic devices, with surface micro-nanostructures emerging as a crucial technological approach for achieving enhanced anti-reflection. In this study, inverted pyramid structures were employed as the micron-scale framework, and micro-nano composite structures were successfully prepared using an inductively coupled plasma (ICP) etching system. This paper, mainly focused on the micro-nano fabrication, investigated the effects of gas flow rate ratio (SF6:O2:C4F8), ICP power, RF power, and etching time on the surface morphology and reflectance of the composite structures. The results demonstrate that the optimal anti-reflective micro-nano composite structure was achieved under the following conditions: SF6 flow rate of 18 sccm, O2 flow rate of 9 sccm, C4F8 flow rate of 4 sccm, ICP power of 300 W, RF power of 5 W, and etching time of 5 min. The average reflectivity of the prepared surface structure was as low as 1.86%.
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Yao, Dong, Guangfeng Shi, Jingran Zhang, and Siwei Meng. "An investigation on the adhesion of dual-scale micro-nano composite structure on the surface of aluminum." Surface Topography: Metrology and Properties 11, no. 2 (2023): 025026. http://dx.doi.org/10.1088/2051-672x/acdb89.

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Abstract Adhesion is a crucial characteristic of hydrophobic surfaces that significantly impacts their practical applications. This paper proposes an innovative method for preparing a dual-scale micro-nano composite structure surface by combining mechanical ruling and anodic oxidation, which demonstrates great potential in enhancing hydrophobic surface properties. Through the analysis of the influence of micro-groove depth on the adhesion of hydrophobic surfaces, it has been discovered that micro-groove dimensions can be used to control surface adhesion while maintaining hydrophobicity, without complex chemical modifications. These findings present a promising approach for tailoring the properties of hydrophobic surfaces to suit specific applications. Compared with the single-scale micro-groove array structures, the surface roughness of the dual-scale micro-nano composite structures is significantly increased, and the contact angle of the water droplet is significantly increased. At the same time, the hydrophobicity and adhesion of the surface of the dual-scale micro-nano composite structures were analyzed. The results show that after anodizing, the contact angle of the dual-scale micro-nano composite structure surface increases, and the surface adhesion can be controlled by adjusting the structural parameters of the micro-groove and the anodizing process parameters, to ensure that the surface presents hydrophobic property while realizing the controllable adhesion of the hydrophobic surface. In this paper, dual-scale micro-nano composite structures fabricated by the composite method have achieved hydrophobic properties, and the surface adhesion can be effectively controlled by adjusting the processing parameters. This method has certain reference significance for the preparation of the controllable adhesive hydrophobic surface and lays a foundation for the further study of the controllable adhesive hydrophobic surface.
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Zhou, Yong Hui, Jun Zhao, and Xing Ai. "Cutting Performance and Wear Mechanisms of an Al2O3-Based Micro-Nano-Composite Ceramic Tool." Key Engineering Materials 443 (June 2010): 244–49. http://dx.doi.org/10.4028/www.scientific.net/kem.443.244.

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An Al2O3-based composite ceramic cutting tool material reinforced with (W, Ti)C micro-particles and Al2O3 micro-nano-particles was fabricated by using hot-pressing technique, the composite was denoted as AWT. The cutting performance, failure modes and mechanisms of the AWT micro-nano-composite ceramic tool were investigated via continuous turning of hardened AISI 1045 steel in comparison with those of an Al2O3/(W, Ti)C micro-composite ceramic tool SG-4 and a cemented carbide tool YS8. Worn and fractured surfaces of the cutting tools were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results of continuous turning revealed that tool lifetime of the AWT ceramic tool was higher than that of the SG-4 and YS8 tools at all the tested cutting speeds. The longer tool life of the AWT composite ceramic tool was attributed to its synergistic strengthening/toughening mechanisms induced by the (W, Ti)C micro-particles and Al2O3 nano-particles.
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Yang, G., F. P. Cai, B. Jiang, et al. "Preparation of Micro/Nano-LiFePO4/C Cathode Material for Li-ion Batteries." Journal of New Materials for Electrochemical Systems 17, no. 4 (2014): 231–34. http://dx.doi.org/10.14447/jnmes.v17i4.396.

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LiFePO4/C composite with micro/nano structure was synthesized via controlled crystallization-dry mixing-carbon thermal reduction method. As prepared micro/nano LiFePO4/C composite show both excellent high-rate performance and high tap density as the cathode for lithium ion batteries. The tap density is 1.39 g·cm-3 while the discharge specific capacities of 148.9, 145.3, 143.3 and 132.6mAh·g-1 are achieved at rates of 1 C, 2 C, 5 C and 10 C, respectively. This as-prepared micro/nano LiFePO4/C composite material is suitable for large-scale application, such as electric vehicles and plug-in hybrid electric vehicles.
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Dissertations / Theses on the topic "Micro- and nano-composite"

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Zhao, Hang. "Comportement multifonctionnel des composites comportant des nano/micro renforts." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLC020/document.

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En raison de leurs propriétés mécaniques, électriques et thermiques exceptionnelles, les nanotubes de carbone (NTC) ont reçu une importante attention mondiale. Les NTC ont un grand potentiel dans différents domaines d'applications tels que le stockage d'énergie et la microélectronique. Grâce à leur structure unidimensionnelle, leur important facteur d'aspect et leur faible densité, les NTC servent comme charges dans les composites. Par contre, en raison des fortes interactions entre eux, il est difficile de les disperser et de les aligner dans une matrice de polymère.Il est connu qu'une bonne conception d'hybrides, constitués de NTC verticalement lignés sur des substrats, améliore de manière significative la dispersion de ces derniers dans la matrice. Ces hybrides sont préparés par le procédé de dépôt chimique en phase vapeur (CVD). Une fois, ces hybrides sont dispersés dans la matrice du composite cela conduit à une nette amélioration des propriétés multifonctionnelles de ce composite. Les substrats utilisés dans cette thèse sont les nanoplaquettes de graphite (NPG) pour donner des hybrides NPG-NTC que nous appellerons par la suite GCHs. Les GCHs ont l'avantage d'avoir une faible densité et une structure totalement conductrice qui améliore les propriétés diélectriques et électriques des composites.Dans l'état de l'art, les relations entre l'organisation des GCHs et les conditions de synthèse par CVD et entre l'ajout des GCHs dans les composites et les réseaux conducteur interne dans les composites n'ont jamais été étudiées. Pour cela, dans cette thèse, nous allons soigneusement étudier et discuter ces problèmes mentionnés.Dans le premier chapitre, nous présentons une revue générale de la structure, des propriétés, des applications et de la synthèse des NTC et des NPG. Nous présentons aussi les procédures de l'intégration des nanoparticules dans des matrices polymères et les méthodes de fonctionnalisation des NTC. Nous discutons aussi des états électriques et les caractéristiques (di)électriques des composites en fonction de la quantité de la charge conductrice.Le deuxième chapitre présente tout d'abord la synthèse des NTC sur les NPG par CVD. Ensuite, l'influence des paramètres de la CVD, la température, la composition du gaz et le temps de la réaction, ont été étudié. Les résultats qualitatifs et quantitatifs obtenus d'après les caractérisations des ces hybrides peuvent servir comme base de données pour l'intégration et l'influence des ces hybrides dans les composites.Le troisième chapitre présente les composites binaires polyvinylidene fluoride/GCHs et leurs propriétés diélectriques qui sont nettement améliorées par rapport aux composites ternaires composés de polyvinylidene fluoride/NPG/NTC. Les composites obtenus par dispersion des GCHs dans la matrice à l'aide du procédé d'extrusion-injection, présentent un seuil de percolation fortement réduit (5,53 vol%) et une stabilité thermique relativement élevée. Leurs propriétés diélectriques améliorées peuvent être attribuées à des réseaux sous forme de micro-condensateurs et le changement de la cristallinité de la matrice peut être attribué à la bonne conception des hybrides.Le quatrième chapitre étudie les composites GCHs/polydiméthylsiloxane (PDMS) avec la haute performance piézo-résistive dans une large gamme de température. Le composite présente un seuil de percolation ultra-bas et une grande sensibilité piézo-résistive. En particulier, les autres améliorations des propriétés électriques obtenues dans les composites GCHs/PDMS par rapport à celles des composites à base de NTC/PDMS, de NPG/PDMS ou encore de NTC-NPG/PDMS. Les légers mouvements des doigts peuvent être détectés grâce à l'usage de ces films composites en tant que capteurs de mouvement<br>Due to the outstanding mechanical electrical and thermal properties, carbon nanotubes (CNTs) received worldwide attentions and intensive investigations in last decades. CNTs are greatly potential in applications such as energy storage and microelectronics. The one dimensional structure, high aspect ratio and low density, promote CNTs serving as the excellent fillers in composites field. However, due to the strong interactions, CNTs are usually difficult to be dispersed and aligned in a polymer matrix. Designing the CNTs construction reasonably is an effective way to ameliorate the dispersion states of CNTs in matrix. These specific hybrid constructions allowed CNTs arrays synthesized vertically onto the substrates through catalyst chemical vapor deposition method. These CNT arrays effectively overcome the problem of CNTs aggregation and promote the interconnection among CNTs, leading to a considerable improvement of multi-functional properties of composites. Graphite nanoplatelets (GNPs) served as substrate make their synthesizing products-GNP-CNTs hybrids (GCHs) possess distinct merits of all-carbon composition, totally-conductive coupling structure and the low intrinsic density. These GCHs constructions provide a great improvement in the dielectric and electrical properties of composites. However, the relationship between GCHs organization and synthesizing conditions during CVD process and the influence of the addition of GCHs to internal conductive networks have not been reported in detail. These mentioned issues will be investigated and discussed in this thesis, which is divided into four chapters:The first chapter makes a general review of the structure, properties, application and synthesis of CNTs and GNP substrates, and the main procedures of fabricating composites and surface functionalization of CNTs. Moreover, a short introduction of the development of micro-nano hybrids applied to the functional composites is made. Most importantly, the developing electrical states and (di) electrical characteristics of composites with ever-increasing conducting filler loading are reviewed in detail at the last part.The second chapter discusses firstly the synthesis process through the CCVD approach and the relationship between CVD parameters and the corresponding construction of GCHs, where the temperature, gas composition and reaction time were controlled. The constructions CNT arrays are dependent on the synthesis conditions. Furthermore, the results obtained from analysis can provide a structural foundation for the huge application potential of GCHs constructions. The third chapter introduces the poly(vinylidene fluoride)-based nanocomposites containing GCH particles, the dielectric properties of which are improved more greatly than the ternary composites loading equivalent mixture of GNPs and CNTs. The composites achieved by dispersing GCH particles into matrix using the mechanical melt-mixing process, showing a strongly reduced percolation threshold (5.53 vol %) and the relatively high thermal stability. Their improved dielectric properties can be attributed to the formed microcapacitor networks and the change of crystalline formation of matrix, caused by well-designed CNT arrays constructions. The fourth chapter investigates the advanced GCHs/ polydimethylsilicone (PDMS) composites with high piezo-resistive performance at wide temperature range. The synthesized GCHs can be well dispersed in the matrix through the mechanical blending process. The flexible composite shows an ultra-low percolation threshold (0.64 vol%) and high piezo-resistive sensitivity (gauge factor ~103 and pressure sensitivity ~ 0.6 kPa-1). Particularly, the much improvements of electrical properties achieved in GCHs/PDMS composites compared with composites filled with equivalent CNT, GNP or mixture of CNTs/GNPs. Slight motions of finger can be detected and distinguished accurately using the composites film as typical wearable sensor
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Recman, Lukáš. "Deformační chování nano/mikro vyztuženého PMMA." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-233297.

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Práce sleduje vliv velikosti částic na elastický modul a deformační chování za mezí kluzu. Bylo pozorováno, že jak elastická oblast, tak oblast za mezí kluzu ukazuje silnou závislost chování na velikosti částic. Cílem této práce je korelovat experimentální data a teoretické předpoklady které bylo odvozeny pro deformační chování v elastické oblasti a v oblasti za mezí kluzu pro amorfní polymery a konkrétně pro PMMA. Vše je motivováno propojit zatím oddělené oblasti kontinuální mikromechaniky a diskrétní nanomechaniky. Deformační chovaní PMMA plněného nano a mikro plnivem bylo pozorováno v elastické a plastické oblasti. Byl zkoumán vliv velikosti částic na velikost modulu a deformačního zpevnění. Mechanizmus vyztužení je interpretován s použitím teorie imobilizace řetězců, nanočástice mají silný vliv na molekulární dynamiku a kinetiku zapletenin. Mým příspěvkem k tomuto tématu je ukázat výraznou závislost na mechanizmu vyztužení v závislosti na velikosti částic. A to jak pod teplotou skelného přechodu tak nad teplotou skelného přechodu. Ačkoli pro velikost modulu byla publikována značná množství dat, která byla následně i interpretována, vliv částic na deformační zpevnění je poskrovnu. Během elastické deformace je primární struktura materiálu neměnná, jedná se o elastickou deformaci, za mezí kluzu již toto neplatí a primární struktura je zde nevratně poškozena. Bylo ukázáno, že obsah nano částic vede ke zvýšení meze kluzu a vyššímu deformačnímu zpevnění. Tento nárůst deformačního zpevnění je v korelaci s Guth-Gold rovnicí. Je předpokládáno, že nanočástice slouží jako další fyzikální zapleteniny a vedou k fyzikálně více zapletenému systému. Stejný efekt jako v elastické oblast tj. vliv velikosti částic na modul, byla pozorována i během deformačního zpevnění.
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Greco, Pier Paolo. "Development of novel polymeric and composite nano-structured micro-porous materials for impact resistance applications." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2517.

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Impact resistant materials (IRMs) are widely used in the automotive and packaging industry. Their main purpose is the protection of the transported occupants or goods. Cellular materials as well as structures combine lightness with large deformation under load. The energy absorption mechanism is provided by limiting the peak load and ensuring the elastic deformation of the IRMs. Polymeric foams are largely used as IRMs due to their cellular structure. Prediction of the foam properties in terms of Young’s Modulus (Elastic Modulus) and the onset of Plateau Region can be related to the foam density and the mechanical properties of the bulk material (Gibson and Ashby model). The structure of the foam is only partly accounted for in the Gibson and Ashby model in terms of material density. However, it is possible to produce cellular materials with the same density but very different internal architectures. This cannot easily be exploited in conventional polymer foams but the processing of High Internal Phase Emulsion (PolyHIPE) and its polymerisation route to produce PolyHIPE Polymers (PHPs) can produce materials with very different structures. Experiments have revealed that the PHPs properties are dictated by their detailed structure. Elastic PHPs with: 1) varying ratio of polymerizable oil phase with respect to aqueous phase and 2) varying mixing time/energy input were produced and tested by mechanical compression at different temperatures and strain rates. The elastic modulus increases with a quadratic law as a function of the polymerizable oil phase content of the HIPE when the mixing time is the same, as predicted by the model. The Specific Absorption Energy (SAE), represented by the area under the stress-strain curve, increases in a similar way. Increasing mixing time on HIPE has the effect of modifying the cellular structure. Smaller pores and narrower distribution of pores are observed. Such features are consistent for any set of PHPs densities and represent a design tool when some specific mechanical characteristics are prescribed. The assessment of process-structure-properties relationships was performed by combining the mechanical response of the various PHPs with the imaging of their structure by Scanning Electron Microscopy. The properties of PHPs were benchmarked with reference to two commercially available products. One material is characterised by a porous structure with a relatively high Young’s Modulus while the other by a non-porous and composite-like solid structure with lower elastic modulus. The properties of the PHPs can be engineered to shift from a foam-like material to a composite-like through the processing parameters which in turn modify the material porous structure. The temperature has very limited effect on the PHPs material unlike for the reference commercial materials. The enhancement of properties (increasing Elastic Modulus and SAE) induced by changing the processing route are remarkable for such a class of porous materials. When plotted on a Modulus-Density chart, the PHPs fill an existing material-chart gap, representing a new class of materials and opening new possibilities as IRMs.
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Ha, Hung M. "Micro- and Nano-Scale Corrosion in Iron-Based Bulk Metallic Glass Sam 1651 and Silver-cored MP35N Lt Composite." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1260391940.

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Wojcieszak, Marine. "La soie, "modèle" de polymères naturels fibreux : analyse vibrationnelle et nano/micromécanique, de la fibre au composite." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066506/document.

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Les protéines fibreuses (kératine, élastine, collagène, fibroïne…) représentent 1/3 des protéinesconstitutives des mammifères et des oiseaux. Ce sont des protéines qui ont une fonction de protection et/oumécanique. La soie apparait comme le système le plus « simple » car elle est principalement constituée demotifs de répétition à base d’alanine et de glycine, deux petits acides aminés. Certaines soies présentent despropriétés mécaniques comparables ou supérieures à celles des fibres synthétiques et seraient susceptiblesd’être de nouveau largement utilisées dans des applications techniques (par exemple biomédicales) si lavariabilité de leurs propriétés était maîtrisée. Ce travail porte sur la structure des soies grèges ou décreuséesde Bombyx mori (ver à soie domestique), de Nephila madagascariensis (araignée sauvage, fibre sansenveloppe de séricine), de Bombyx mori génétiquement modifié (incluant un gène de Nephila) et sur unesoie recombinante 4RepCT (Escherichia coli). La soie est analysée par spectrométrie Raman (et IRTF) ettraction uni-axiale, ainsi que par le couplage de ces méthodes. L’analyse de la région des bas nombresd’onde en spectroscopie Raman a permis de caractériser des régions ordonnées de 2 à 3 μm de long etdistantes d’environ 60 μm. Il s’agit de la première mise en évidence d’une hétérogénéité de structure de lasoie. Le couplage avec la traction uni-axiale montre une sollicitation de ces régions ordonnées sousdéformation, suggérant une organisation de la soie selon le modèle de Prevorsek, c’est à dire qu’une mêmechaîne macromoléculaire appartient à la fois à des régions amorphes et à des régions ordonnées. L’étudestatistique des propriétés mécaniques de la soie de ver et d’araignée montre une grande distribution, maisune bonne stabilité dans le temps (dizaines d’années). La modification génétique ne procure pasd’amélioration des propriétés mécaniques de la fibre, seulement une légère diminution de la variabilité.Diverses stratégies sont mises en oeuvre pour tenter d’échapper à cette variabilité : production bactérienne,solubilisation de la soie et régénération sous forme de films. Le rôle de l’eau lors de la biosynthèse de lasoie, ainsi que l’effet de divers paramètres (filtration, pH, séchage…) lors de la préparation des films ont étéétudiés. Nous avons pu confirmer que la présence d’agrégats de protéines favorise l’organisation dans lesfilms et 2 types de films ont donc été préparés. Les films les plus amorphes présentent les propriétésmécaniques les plus intéressantes, même si elles n’atteignent de quelques % de celles des fibres. Lafabrication de composites à matrice de soie régénérée renforcée par des fibres de soie permet d’augmenterla résistance et la déformation à rupture. Ces premiers résultats sont encourageants pour le développementde matériaux composites fibres de soie/matrice de soie régénérée<br>Fibrous proteins (keratin, elastin, collagen, fibroin ...) make up to one third of the proteins ofmammals and birds. They are structural proteins with a protective and/or mechanical function. Silk appearsto be the ‘simplest’ model because it mainly consists of two small amino acids residues (alanine andglycine). Some silks have comparable or superior mechanical properties compared to those of syntheticfibres and could be used in technical applications (e.g. biomedical) if the variability of their properties canbe controlled. This work focuses on the structure of silks from: Bombyx mori (domestic silkworm)degummed or not, Nephila madagascariensis (wild spider, no sericin coating), GM Bombyx mori (includinga gene of Nephila) a recombinant spider silk 4RepCT (Escherichia Coli). Silk is analyzed by Ramanspectroscopy (and FTIR), uni-axial tensile testing, and also by the coupling of these methods. The analysisof the low wavenumbers region in Raman spectroscopy allowed the characterization of ordered regions of 2to 3 microns separated by about 60 microns. This is the first evidence of the heterogeneous structure ofsilk. Coupling with the uni-axial tensile test shows that these ordered regions are stressed under macroscopicdeformation, suggesting silk organization according to Prevorsek’s model, i.e. that the samemacromolecular chain belongs to both amorphous and ordered regions. The statistical study of themechanical properties of silkworm and spider silks shows great dispersion, but a good stability over time(decades). Genetic modification does not improve the fibres mechanical properties but a slight decrease intheir variability. Various strategies have been investigated to control the variability: bacterial production,solubilization of silk and films regeneration. The role of water in silk biosynthesis, as well as the effect ofvarious parameters (filtration, pH, drying ...) during the preparation of the films were studied. It wasconfirmed that the presence of protein aggregates promotes the organization in film and two types of filmswere prepared. The most amorphous ones have the most interesting mechanical properties, though only afew percent of those from the starting fibres. The fabrication of regenerated silk matrix compositesreinforced by silk fibres increases the strength and strain to failure. These initial results are encouraging forthe development of silk fibres/regenerated silk matrix composite materials
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Zhang, Jie. "Contribution aux développements des technologies de compression polymères chargés pour la réalisation d'inserts métalliques micro-structurés." Thesis, Besançon, 2013. http://www.theses.fr/2013BESA2044/document.

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Les travaux menés dans le cadre de cette thèse sont focalisés sur les procédés deréplication permettant la transformation des mélanges en composants par les technologiesen séquentiel ou bien en continu, selon les applications visées. Les développementsconcernent la mise en place et l’hybridation de différents procédés de micro-réplication(estampage à chaud de polymère thermoplastique et par laminage circulaire entre deuxrouleaux). Ces deux procédés sont développés et optimisés pour l’élaboration decomposants micro-structurés ou de microcomposants possédant des propriétésfonctionnelles mécaniques ou thermo-physiques requises à partir de différents mélangeschargés en poudres métalliques ou en nanotubes de carbone. Des exemples de réalisationde composants structurés, à base d’un système micro-fluidique possédant plusieurs canauxde 200 microns par 200 microns et des réservoirs de diamètre de 2 mm, sont prises commeexemple tout au long de ces travaux de cette thèse. Différents travaux de caractérisationsont été entrepris pour optimiser les procédés de micro-réplication par estampage à chaud etpar laminage circulaire entre deux rouleaux<br>The Ph.D subject concerns the study of two micro-replication processes by hotembossing and roll to roll processes for thermoplastic polymers and loaded polymers withpowders or carbon nanotubes. The micro-replication processes, realized in sequential orcontinuous ways, use some different elaborated loaded feedstocks in order to obtainstructural components or micro-component with high aspect ratio and mechanical orthermo-physical properties.A chain combining hot embossing and roll embossing and powder metallurgy have beendeveloped in our lab and investigated. The different micro mould die cavities have beenrealized with different micro-manufacturing process, elastomeric mould has been obtainedby casting process. Finally, a metallic structured die cavity has been obtained by combininghot embossing and debinding and sintering stages. The second topic is the comparison ofmetallic die cavity mould obtained by roll embossing or rolls embossing. Two demonstratorshave been developed during the preparation of this Ph.D period: first a metallic micro-fluidicsystem with micro-structuration with diameter of 1 mm for the reservoir and 200 microns by200 microns for the channel have been realized and characterized by different methods.Secondly, some functional micro-component has been obtained with carbon nanotube andsome specific properties in terms of mechanic and thermo-physical properties have beencharacterized
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Pacchini, Sebastien. "Etude des potentialités des nanotubes de carbone dans le domaine hyperfréquence : Application à l'élaboration de matériaux nanocomposites et contribution à la miniaturisation de composants électromécaniques (NEMS)." Phd thesis, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-00366700.

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La découverte des nanotubes de carbone (NTCs) par S.Iijima en 1990 a permis d'explorer un nouveau monde à l'échelle nanométrique. Les études sur la synthèse des NTCs durant le début de cette décennie ont apporté une reproductibilité des formes allotropiques de carbone. Les propriétés mécaniques et électriques exceptionnelles des NTCs ont éveillé l'esprit des scientifiques afin de concevoir des systèmes touchant le domaine de la nanotechnologie. Dans ce contexte, mes travaux de recherches ont visé à étudier les potentialités des nanotubes de carbone dans le domaine des hyperfréquences. Deux types d'applications peuvent être distinguées : l'élaboration de matériau nano-composite mais aussi la miniaturisation des composants électromécaniques (NEMS). L'application la plus immédiate des NTCs consiste à les utiliser comme additif dans des polymères, thermoplastiques, thermodurcissables ou élastomères, afin d'en modifier les propriétés. L'utilisation des matériaux composites à base de nanotubes de carbone apparaît comme une voie prometteuse dans le domaine des nanotechnologies grâce à leurs propriétés structurales et électroniques très particulières. Pour élargir le domaine d'application des NTCs, nous avons étudié un nouveau matériau composite à base d'un polymère (BenzoCycloButène BCB'') et de nanotubes de carbone double parois (DNTCs) pour une utilisation aux fréquences micro-ondes. Nous rapportons ici une étude des propriétés micro-ondes de composites BCB/DNTCs en fonction de la concentration massique de nanotubes. Nous présentons, dans un premier temps, les méthodes d'homogénéisation et de fabrication du composite, puis nous traitons l'élaboration de structures de test adaptées à des mesures µondes et millimétriques. Après caractérisation, nous donnons le comportement spectral et la modélisation pour les pertes linéiques ainsi que e* (permittivité effective complexe). Cette étude a permis de montrer qu'il est possible de configurer les performances électriques d'un matériau composite en fonction du % de NTCs incorporés. Ceci peut permettre de réaliser des matériaux absorbants d'ondes électromagnétiques pour la microélectronique. Une autre possibilité d'utilisation est d'exploiter les propriétés physiques ainsi que dimensionnelles des NTCs pour étendre le concept de composants passifs reconfigurables et micrométriques (MEMS) à l'échelle nanométrique avec l'élaboration de Système Nano-Electro- Mécaniques (NEMS). Leurs dimensions nanométriques permettraient de concevoir de futurs dispositifs électroniques fortement miniaturisés. Nous nous sommes donc intéressés au développement d'une filière technologique d'interconnexions pour réaliser une capacité variable dont la partie mobile est réalisée à l'aide de NTCs. Plusieurs voies ont été étudiées. Une 1ère comporte la croissance localisée des NTCs, réalisée à 600°C minimum par le LPICM. Cette température a impliqué de nombreux choix quant à la filière d'interconnexions (procédés chauds-froids suivant le positionnement de l'étape de croissance des NTCs) et d'études de compatibilité thermique. Une seconde voie est basée sur l'emploie de film mince de NTCs dispersés aléatoirement.- Au final, cette étude représente une grande avancée vers l'élaboration de NEMS RF à base de NTCs.
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Peng, Suili. "Nano/micro particle-based functional composites and applications /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?NSNT%202007%20PENG.

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Peters, Sarah June. "Fracture Toughness Investigations of Micro and Nano Cellulose Fiber Reinforced Ultra High Performance Concrete." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/PetersSJ2009.pdf.

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Peditto, Francesca Priola Aldo Gérard Jean-François. "Photopolymerized micro-and nano-composites interface chemistry and its role on interfacial adhesion /." Villeurbanne : Doc'INSA, 2005. http://docinsa.insa-lyon.fr/these/pont.php?id=peditto.

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Books on the topic "Micro- and nano-composite"

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Thomas, Sabu, Nandakumar Kalarikkal, and Raghvendra Mishra. Micro and Nano Fibrillar Composites (MFCs and NFCs) from Polymer Blends. Elsevier Science & Technology, 2017.

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Thomas, Sabu, Nandakumar Kalarikkal, and Raghvendra Kumar Mishra. Micro and Nano Fibrillar Composites (MFCs and NFCs) from Polymer Blends. Elsevier Science & Technology, 2017.

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Book chapters on the topic "Micro- and nano-composite"

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Dusza, Ján, Monika Kašiarová, Alexandra Vysocká, Jana Špaková, Miroslav Hnatko, and Pavol Šajgalík. "Carbon Derived Si3 N4 +SiC Micro/Nano Composite." In Characterization, Design, and Processing of Nanosize Powders and Nanostructured Materials. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118144077.ch4.

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Kašiarová, Monika, and Ján Dusza. "Fracture and Fractography of A Si3 N4 -SiC Micro/Nano Composite." In Ceramic Transactions Series. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118144152.ch17.

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Swamy Naidu, Y., and G. V. Nagesh Kumar. "Electric Field Computation of Epoxy- Nano and Micro Composite Conical Spacer in a Gas Insulated Busduct." In Advances in Intelligent Systems and Computing. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7868-2_55.

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Ren, Xuezhuang, Lijun Yang, Chen Li, Guanghua Cheng, and Nan Liu. "Design and Analysis of Underwater Drag Reduction Property of Biomimetic Surface with Micro-nano Composite Structure." In Advances in Mechanical Design. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9941-2_45.

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Azzoug, Rabah, Fatah Hellal, and Yamina Mebdoua. "Microstructural Analysis of Nickel-Based Composite Coatings and Their Effect on Micro-hardness and Nano-indentation Behavior." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11827-3_6.

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Zozimus Divya Lobo, C., J. Maalmarugan, R. Divya, et al. "Synthesis and Studies of TTAHOT: Macro, Micro and Nano Crystalline Composite for Electronic and Bio-Medicinal Use." In Environmental and Microbial Biotechnology. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2808-8_8.

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Wierach, Peter. "Nano-Micro-Macro." In Adaptive, tolerant and efficient composite structures. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29190-6_2.

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Dusza, Ján, Monika Kašiarová, Lucia Hegedűsová, Miroslav Hnatko, and Pavol Šajgalík. "Bending and Contact Strength of a Si3N4+SiC Micro/Nano Composite." In Materials Science Forum. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-469-3.177.

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Murín, Justín, Vladimír Kutiš, Michal Masný, and Rastislav Ďuriš. "Composite (FGM’s) Beam Finite Elements." In Composites with Micro- and Nano-Structure. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6975-8_12.

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Balamurugan, K., M. Uthayakumar, S. Sankar, U. S. Hareesh, and K. G. K. Warrier. "Abrasive Waterjet Cutting of Lanthanum Phosphate—Yttria Composite: A Comparative Approach." In Micro and Nano Machining of Engineering Materials. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99900-5_5.

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Conference papers on the topic "Micro- and nano-composite"

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Chaar, Omar, Ahmad Raza Khan Rana, and George Jarjoura. "Development of Novel Corrosion Resistant Electroless Ni-P Composite Coatings for Pipeline Steel." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17841.

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ABSTRACT This paper describes the deposition of various Ni-P composite coatings over an AISI 1012 steel sample through an electroless coating process. The composite coatings were prepared using various ternary additives namely carbon nanotubes, titanium, and alumina. Coated samples were characterized over alongside surface and cross-sections using energy dispersive spectroscopy. Corrosion behaviors of composite coatings were characterized using potentiodynamic polarization. Mechanical and tribological attributes were evaluated using Vickers hardness and nano-indentation, respectively. Among the candidate additives, Titanium reached the maximum incorporation (upto 30 wt.%). Alumina particles showed competing compromise between surface smoothness and deposition rate. Carbon nanotubes improved lubrication effects by reducing co-efficient of friction (checked using universal micro tribometer). Alumina manifested the highest hardness and the least corrosion rate in comparison to the candidate additives.
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Monteiro, Othon R., Radhika Suresh, Sankaran Murugesan, and Valery Khabashesku. "Corrosion Resistance of Ni-Metal Matrix Composite Coatings: Effect of Microstructure." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09806.

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Abstract Metal matrix composite (MMC) and nanocomposite coatings are being proposed as alternatives to their monolithic counterparts to improve protection against wear in chemically-aggressive environments. Corrosion resistance of MMC coatings is strongly dependent on the coating microstructure, which is affected by the physical and chemical nature of the dispersed particles, as well as the particle concentration. In this paper, we present the results of our tests on the corrosion response of Ni-P MMC coatings with micro-crystalline and nano-crystalline diamond as the dispersed phase. Potentiodynamic and electrochemical impedance spectroscopy tests were performed to compare the corrosion of Ni-P composites and nanocomposites, and the results are analyzed in terms of their microstructures. The corrosion potential is primarily determined by the P content and the heat treatment carried out after deposition, and is weakly dependent on the particle content. In low-P coatings, the presence of micrometer-size particles has no significant impact on Ecorr and Icorr. Heat treatment increases Ecorr and decreases Icorr. Similar trends are observed in the high-P coatings. EIS results suggest self-healing behavior with some microstructures.
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Frechette, M. F., C. Vanga-Bouanga, and E. David. "Epoxy containing micro-nano carbonaceous composite additives." In 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2015. http://dx.doi.org/10.1109/icpadm.2015.7295263.

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Muto, Hiroyuki. "Nano/micro — composite particles: Preparation process and applications." In 2017 International Symposium on Electrical Insulating Materials (ISEIM). IEEE, 2017. http://dx.doi.org/10.23919/iseim.2017.8088709.

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Pan, Feng, Heather Spence, Douglas Spearot, and Adam Huang. "Nano-Particle Polymer Composite MEMS corrosion." In 2011 IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2011. http://dx.doi.org/10.1109/nems.2011.6017559.

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Kim, Sung-Geun, Won-Shik Chu, Hyung-Jung Kim, and Sung-Hoon Ahn. "Measurement of Mechanical Strength of Nano Composite Fabricated by Nano Composite Deposition System (NCDS)." In ASME 2006 Multifunctional Nanocomposites International Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/mn2006-17031.

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The rapid prototyping (RP) technology has been advanced for various applications such as verification of design, functional test. Recently, researchers have studied various materials to fabricate functional RP parts. In this research, a nano composite deposition system (NCDS), which can fabricate various nano composites using polymer resins with various nano particles, was introduced. The NCDS is a hybrid system in which material removal process by mechanical micro machining and/or the deposition process is combined. To predict the mechanical behavior of nano composite part made by NCDS, it is critical to understand the mechanical properties of the NCDS material. The NCDS process was characterizes by process parameters such as raster orientation, bead width, weight percent, and curing condition. Tensile strengths and compressive strengths of fabricated specimens with various raster orientation were measured, and various sample parts made of nano composites were fabricated using NCDS.
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Dongbing Geng, Liming Zeng, Bing Hu, Yi Li, and Yi Zhang. "Dynamic mechanical analysis of nano-SiO2 /bismaleimide composite." In 2008 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2008. http://dx.doi.org/10.1109/nems.2008.4484410.

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Geng, Dongbing, Liming Zeng, and Yi Li. "Thermo-oxidative stability of Nano-SiO2 /bismaleimide composite." In 2009 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2009. http://dx.doi.org/10.1109/nems.2009.5068675.

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Ma, Xiang, Yonghai Zhang, Xiaoping Yang, and Jinjia Wei. "Superhydrophilic Composite Structure of Copper Micro-Channel and Nano-Forest for Enhancing Boiling Heat Transfer." In ASME 2024 7th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/mnhmt2024-133006.

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Abstract Nanostructures are then made on the micro-pin-fins through a simple one-step electrodeposition process, which looks like a natural forest structure with rich branch-like grooves. Capillary rise tests were performed with ethanol to characterize the capillary force of the wick structure. An efficient boiling heat transfer (BHT) interface based on a superhydrophilic copper micro-pin-fins and nano-forest composite structure is reported. In principle, these micro-pin-fins are efficient nucleation sites, helping to reduce the surface superheat required for the onset of nucleate boiling (ONB) and enhance the heat transfer coefficient (HTC). Disperse nano-forest contribute to bubbles detachment from the heated wall rapidly. Micro-pin-fins with a depth of a few hundreds of microns can avoid excessive interface thermal resistance, the superwetting effect of the micro-nano composite structure helps to increase the critical heat flux (CHF). By studying the morphology, wettability, liquid subcoolings and heat transfer characteristics of the micro-pin-fins and nano-forest composite structure as a function of growth time, an optimal interface was obtained, with a maximum HTC enhancement of 243%, CHF enhancement of 204%, and the superheat corresponding to the ONB compared to the flat copper surface is reduced by 50%. At the same time, the combination of experimental and theoretical analysis also clarified why the micro-pin-fins and nano-forest composite structure on the copper surface can effectively enhance boiling heat transfer.
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Boyd, Robert W. "Enhanced Nonlinear Optical Response of Nano- and Micro-Scale Composite Materials." In Frontiers in Optics. OSA, 2006. http://dx.doi.org/10.1364/fio.2006.fwe1.

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Reports on the topic "Micro- and nano-composite"

1

Luzinov, Igor, and Konstantin Kornev. Functionalized Nano and Micro Structured Composite Coatings. Defense Technical Information Center, 2011. http://dx.doi.org/10.21236/ada552528.

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