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Статті в журналах з теми "Continuous-Fiber Ceramic Composites (CFCC)":

1

Liaw, P. K., N. Yu, D. K. Hsu, N. Miriyala, V. Saini, L. L. Snead, C. J. McHargue, and R. A. Lowden. "Moduli determination of continuous fiber ceramic composites (CFCCs)." Journal of Nuclear Materials 219 (March 1995): 93–100. http://dx.doi.org/10.1016/0022-3115(94)00664-4.

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2

Mingazzini, Claudio, Matteo Scafè, Daniele Caretti, Daniele Nanni, Emiliano Burresi, and Alida Brentari. "Poly-Siloxane Impregnation and Pyrolysis of Basalt Fibers for the Cost-Effective Production of CFCCs." Advances in Science and Technology 89 (October 2014): 139–44. http://dx.doi.org/10.4028/www.scientific.net/ast.89.139.

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In this work, the optimisation of basalt fiber CFCCs (Continuous Fiber Ceramic Composites) production is presented, focusing on the development of a silicon-oxycarbide matrix by PIP (Polymer Impregnation Pyrolysis). The use of low cost poly-siloxanes and basalt fibers is particularly promising for transports and constructions, where thermostructural CFCCs would be interesting for vehicle weight reduction and fire-resistant panels, but only on the condition that production costs are kept really low. The basalt/SiCO composites are suitable for mechanical applications up to 600°C and stand up temperatures up to 1200°C, also in oxidative environments. The key parameters to keep the production costs low are the furnace and moulds type, being steel probably the best material for both, since it withstands the pyrolysis temperature and can be easily cleaned, by oxidation, from any residue. Regarding the pyrolysis environment, two conditions were compared, nitrogen flow and vacuum, being perhaps the vacuum procedure less expensive and so potentially more appealing for a large scale production. The microstructure and the thermomechanical characteristics of the obtained composites were compared, Another key parameter in determining the production costs is the number of PIP steps, which has to be minimised. The present results support the conclusion that one PIP step in nitrogen or two PIP steps in vacuum can provide CFCC with satisfactory mechanical characteristics for thermomechanical applications in oxidative environments.
3

Johnson, WS, JE Masters, DW Wilson, L. Chuck, and GA Graves. "Hoop Tensile Strength and Fracture Behavior of Continuous Fiber Ceramic Composite (CFCC) Tubes from Ambient to Elevated Temperatures." Journal of Composites Technology and Research 19, no. 3 (1997): 184. http://dx.doi.org/10.1520/ctr10029j.

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4

Duffy, S. F., J. L. Palko, J. B. Sandifer, C. L. DeBellis, M. J. Edwards, and D. L. Hindman. "Trends in the Design and Analysis of Components Fabricated From CFCCs." Journal of Engineering for Gas Turbines and Power 119, no. 1 (January 1, 1997): 1–6. http://dx.doi.org/10.1115/1.2815548.

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Continuous fiber ceramic composite materials (CFCCs) are being considered for an increasing number of commercial applications. They provide the potential for lighter, stronger, more corrosion-resistant components that can perform at higher temperature for long periods of time. Global competitiveness demands a shortening of the time for CFCC commercialization. Thus, considerable efforts has been expended to develop and improve the materials, and to a lesser extent, to develop component design methods and data bases of engineering properties. To shorten the time to commercialization, project efforts must be integrated, while balancing project resources between material development and engineering design. Currently a good balance does not exist for most materials development projects. To rectify this imbalance, improvements in engineering design and development technologies must be supported and accelerated, with a focus on component issues. This will require project managers to give increasing emphasis to component design needs in addition to their current focus on material development.
5

Kwon, Oh Heon, and Yu Seong Yun. "Computational Simulation of Fracture Behavior Due to Mechanical and Constituent Properties of CFCCs." International Journal of Modern Physics B 17, no. 08n09 (April 10, 2003): 1724–29. http://dx.doi.org/10.1142/s0217979203019575.

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Continuous fiber reinforced ceramic matrix composites (CFCCs) are recently a subject of a lot of research interest due to advantages which are high specific stiffness and strength, high toughness and nonbrittle failure as compared to monolithic ceramics. The basic purpose of the present study is to describe graphically the fracture behavior of CFCCs according to a dependence on constituent properties. In CFCCs, following matrix cracking, intact fibers bridge effects impose closure tractions behind the crack tip that reduce the driving force for further cracking. Thus matrix cracking stress and bridging stress are important. Then the change of fiber volume fraction is given for the matrix cracking stress by the numerical simulation. Numerical simulation are carried out by using a finite element analysis code ANSYS. The double mesh concept is applied to account for fiber and matrix material properties.
6

Lee, Sea Hoon, Hidehiko Tanaka, Toshiyuki Nishimura, Shu Qi Guo, and Yutaka Kagawa. "Low Temperature Sintering of AlN-SiC-TiB2 System for the Fabrication of Continuous Fiber Reinforced Ceramic Composites (CFCC)." Solid State Phenomena 124-126 (June 2007): 1075–78. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.1075.

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We report sintering additive systems to decrease the densification temperature of the corrosion resistant AlN-SiC-TiB2 system. Since oxide additives degrade the high temperature properties of the system, and other kinds of metallic additives may affect the formation of protective mullite during oxidation, only the constituent elements were applied as additives. Dense samples ( > 98 % relative density) could be fabricated at 1850 oC and 1900 oC by spark plasma sintering (SPS) and hot pressing method, respectively.
7

Ailey, K. S., K. L. More, and R. A. Lowden. "The Stability of BN Interfacial Coatings in CFCC Systems During Oxidation and Exposure to Moisture." Microscopy and Microanalysis 3, S2 (August 1997): 729–30. http://dx.doi.org/10.1017/s1431927600010539.

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The mechanical reliability of ceramic matrix composites (CMCs) at elevated temperatures in oxidative environments is primarily dependent upon the chemical and structural stability of the fiber/matrix interface. Graphitic carbon coatings have traditionally been used to control the interfacial properties in CMCs, however, their use is limited in high temperature oxidative environments due to the loss of carbon and subsequent oxidation of the fiber and matrix. Thus, BN is being investigated as an alternative interfacial coating since it has comparable room temperature properties to carbon with improved oxidation resistance. The stability of BN interfaces in SiC/SiC composites is being investigated at elevated temperatures in either flowing oxygen or environments containing water vapor. The effect of several factors on BN stability, including crystallographic structure, extent of BN crystallization, and impurity content, are being evaluated.Nicalon™ fiber preforms were coated with ≈ 0.4 μm of BN by CVD using BCl3, NH3, and H2 at 1373 K. The coated preforms were densified using a forced-flow chemical vapor infiltration (FCVI) technique developed at ORNL.
8

Steen, M., and C. Filiou. "Mechanical Property Scatter in CFCCs." Journal of Engineering for Gas Turbines and Power 122, no. 1 (October 20, 1999): 69–72. http://dx.doi.org/10.1115/1.483177.

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The tensile response of continuous fibre reinforced ceramic matrix composites (CFCCs) is not expected to show the large variation in strength properties commonly observed for monolithic ceramics. Results of recent investigations on a number of two-dimensional reinforced CFCCs have nevertheless revealed a considerable scatter in the initial elastic modulus, in the first matrix cracking stress and in the failure stress. One school of thought considers that the observed variability is caused by experimental factors. Elaborate testing programmes have been set up to clarify the origins of this scatter by investigation of the effects of control mode, loading rate, specimen shape, etc. Another school explains the scatter by the presence of (axial) residual stresses in the fibres and in the matrix. Although plausible, this hypothesis is difficult to verify because experimental determination of the residual stress state in CFCCs is not straightforward. In addition, with the available methods it is impractical to determine the residual stresses in every test specimen. This approach is indeed required for establishing the relationship between the magnitude of the residual stresses and the experimentally observed scatter. At IAM a method has been developed and validated which allows to quantify the axial residual stress state in individual CFCC specimens by subjecting them to intermittent unloading-reloading cycles. The method as well as the derived relationship between residual stress state and scatter in mechanical response will be presented. [S0742-4795(00)01101-7]
9

Hack, Horst. "Structural Material Trends in Future Power Plants." Journal of Engineering Materials and Technology 122, no. 3 (March 1, 2000): 256–58. http://dx.doi.org/10.1115/1.482795.

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Environmental and economic concerns necessitate advances in power generation technology. Future power plants will be more fuel efficient, environmentally benign, and economical than current power plants. A high performance power system (HIPPS), based on a coal-fired combined cycle, is currently being developed. The corrosion and temperature-strength properties of currently available metallic materials limit the maximum efficiency of this cycle. Recently, ceramic matrix composites have shown promise in overcoming the design limitations on future power plants. In particular, the high-temperature strength, and corrosion and erosion resistant properties of continuous fiber ceramic composites (CFCCs) will allow engineers to design high-temperature heat exchangers, cyclone vortex finder tubes, and other components. Research is being performed to evaluate candidate materials for use in future power plants. [S0094-4289(00)00203-6]
10

Price, J. R., O. Jimenez, L. Faulder, B. Edwards, and V. Parthasarathy. "Ceramic Stationary Gas Turbine Development Program—Fifth Annual Summary." Journal of Engineering for Gas Turbines and Power 121, no. 4 (October 1, 1999): 586–92. http://dx.doi.org/10.1115/1.2818512.

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A program is being performed under the sponsorship of the United States Department of Energy, Office of Industrial Technologies, to improve the performance of stationary gas turbines in cogeneration through the selective replacement of metallic hot section components with ceramic parts. The program focuses on design, fabrication, and testing of ceramic components, generating a materials properties data base, and applying life prediction and nondestructive evaluation (NDE). The development program is being performed by a team led by Solar Turbines Incorporated, and which includes suppliers of ceramic components, U.S. research laboratories, and an industrial cogeneration end user. The Solar Centaur 50S engine was selected for the development program. The program goals included an increase in the turbine rotor inlet temperature (TRIT) from 1010°C (1850°F) to 1121°C (2050°F), accompanied by increases in thermal efficiency and output power. The performance improvements are attributable to the increase in TRIT and the reduction in cooling air requirements for the ceramic parts. The ceramic liners are also expected to lower the emissions of NOx and CO. Under the program uncooled ceramic blades and nozzles have been inserted for currently cooled metal components in the first stage of the gas producer turbine. The louvre-cooled metal combustor liners have been replaced with uncooled continuous-fiber reinforced ceramic composite (CFCC) liners. Modifications have been made to the engine hot section to accommodate the ceramic parts. To date, all first generation designs have been completed. Ceramic components have been fabricated, and are being tested in rigs and in the Centaur 50S engine. Field testing at an industrial co-generation site was started in May, 1997. This paper will provide an update of the development work and details of engine testing of ceramic components under the program.

Дисертації з теми "Continuous-Fiber Ceramic Composites (CFCC)":

1

Vazquez, Calnacasco Daniel. "All-Oxide Ceramic Matrix Composites : Thermal Stability during Tribological Interactions with Superalloys." Thesis, Luleå tekniska universitet, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85513.

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The challenges faced in today’s industry require materials capable of working in chemically aggressive environments at elevated temperature, which has fueled the development of oxidation resistant materials. All-Oxide Ceramic Matrix Composites (OCMC) are a promising material family due to their inherent chemical stability, moderate mechanical properties, and low weight. However, limited information exists regarding their behavior when in contact with other high-temperature materials such as superalloys. In this work three sets of tribological tests were performed: two at room temperature and one at elevated temperature (650 °C). The tests were performed in a pin-on-disk configuration testing Inconel 718 (IN-718) pins against disks made with an aluminosilicate geopolymeric matrix composite reinforced with alumina fibers (N610/GP). Two different loads were tested (85 and 425 kPa) to characterize the damage on both materials. Results showed that the pins experienced ~ 100 % wear increase when high temperature was involved, while their microstructure was not noticeably affected near the contact surface. After high temperature testing the OCMC exhibited mass losses two orders of magnitude higher than the pins and a sintering effect under its wear track, that led to brittle behavior. The debris generated consists of alumina and suggests a possible crystallization of the originally amorphous matrix which may destabilize the system. The data suggests that while the composite’s matrix is stable, wear will not develop uncontrollably. However, as soon as a critical load/temperature combination is attained the matrix is the first component to fail exposing the reinforcement to damage which drastically deteriorates the integrity of the component.
2

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
3

Delcamp, Adrien. "Protection de fibres base SiC pour composites à matrice céramique." Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13729/document.

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Les composites à matrice céramique (CMC) sont des matériaux constitués d’une matrice céramique renforcée par des fibres céramiques continues (généralement à base de SiC ou de C). Le travail de thèse présenté, réalisé en collaboration avec Snecma Propulsion solide et l’Agence De l’Environnement et de la Maîtrise de l’Energie, a pour objectif d’introduire des matériaux CMC au sein de pièces de moteurs d’avions civils, concurrençant ainsi les alliages métalliques actuellement utilisés. Pour ce faire, les matériaux CMC devront répondre aux exigences propres à l’aéronautique civil, à savoir qu’ils devront présenter une longue durée de vie en atmosphère oxydante dans une gamme de basse température (400-600°C) et avoir un coût compétitif. Dans ce contexte, des matériaux CMC constitués de fibres SiC de première génération, de coût moins élevé, sont étudiés, mais leur inconvénient majeur est leur plus grande sensibilité à l’oxydation. Des matrices auto-cicatrisantes multicouches à base de Si, B, et C ont été développées ces dernières années afin d’assurer une tenue à l’oxydation des fibres, mais elles ne sont pas opérantes dans la gamme de température imposée. Compte tenu d’études précédemment réalisées et des exigences requises pour l’application visée, l’objectif du travail présenté dans ce mémoire est de proposer des solutions pour améliorer la tenue à l’oxydation de renforts fibreux à base de fibres de SiC de première génération, dans la gamme de température 400-600°C, en évitant un surcoût de production trop important
Continuous fiber-reinforced ceramic matrix composites (CFCCs) are an important class of materials for structural applications at elevated temperatures because of their improved flaw tolerance, large fracture resistance, improved toughness by crack deflection and crack bridging mechanism, low density and noncatastrophic mode of failure comparing with metallic materials. Fibers play a critical role in both the processing and performance of CFCCs. SiC-based fibers are considered leading candidate materials in the aerospace application, such as engine turbines. However, the major shortcoming of SiC-based fibers is their oxidative embrittlement and degradation, which is caused by the oxygen ingression from the micro cracks and interstitials in the composites, is the dominant life-limiting phenomenon of non-oxide composites. This study carried out with the financial supply of both Snecma Propulsion Solide and Agence De l’Environnement et de la Maîtrise de l’Energie has for objective to integrate SiC-based as reinforcement in CFCCs for civil aircraft engine application. In order to reach this objective, it is imperative to find a novel approach to diminish the oxygen ingression by developing protective fiber coatings

Книги з теми "Continuous-Fiber Ceramic Composites (CFCC)":

1

Halbig, Michael C. Degradation of continuous fiber ceramic matrix composites under constant-load conditions. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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2

Halbig, Michael C. Oxygen diffusion and reaction kinetics in continuous fiber ceramic matrix composites. [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1999.

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3

Jenkins, MG, E. Lara-Curzio, ST Gonczy, NE Ashbaugh, and LP Zawada, eds. Thermal and Mechanical Test Methods and Behavior of Continuous-Fiber Ceramic Composites. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1997. http://dx.doi.org/10.1520/stp1309-eb.

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4

Fabrication routes for continuous fiber-reinforced ceramic composites (CFCC). [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1998.

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5

Handbook on continuous fiber-reinforced ceramic matrix composites. West Lafayette, Ind: Ceramics Information Analysis Center, Center for Information and Numerical Data Analysis and Synthesis, Purdue University, 1995.

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6

C, Chamis C., Mital Subodh K, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., eds. Computational simulation of continuous fiber-reinforced ceramic matrix composites behavior. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1996.

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7

Computational simulation of continuous fiber-reinforced ceramic matrix composites behavior. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1996.

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8

1958-, Jenkins Michael G., ed. Thermal and mechanical test methods and behavior of continuous-fiber ceramic composites. West Conshohocken, PA: ASTM, 1997.

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9

Oxidation of continuous carbon fibers within a silicon carbide matrix under stressed and unstressed conditions. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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Частини книг з теми "Continuous-Fiber Ceramic Composites (CFCC)":

1

Lee, Sea Hoon, Hidehiko Tanaka, Toshiyuki Nishimura, Shuqi Guo, and Yutaka Kagawa. "Low Temperature Sintering of AlN-SiC-TiB2 System for the Fabrication of Continuous Fiber Reinforced Ceramic Composites (CFCC)." In Solid State Phenomena, 1075–78. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.1075.

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2

Johnson, S. M., D. J. Rowcliffe, and M. K. Cinibulk. "Continuous SiC Fiber/Glass Composites." In Ceramic Microstructures ’86, 633–41. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1933-7_64.

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3

Gottlieb, Rebecca, Shannon Poges, Chris Monteleone, Steven L. Suib, and Steven L. Suib. "Continuous Fiber-reinforced Ceramic Matrix Composites." In Advanced Ceramic Materials, 146–99. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119242598.ch4.

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4

Leslie, Clifford J., Emmanuel E. Boakye, Kristin A. Keller, and Michael K. Cinibulk. "Development of Continuous SiC Fiber Reinforced HfB2 -SiC Composites for Aerospace Applications." In Ceramic Transactions Series, 1–12. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118744109.ch1.

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5

Lara-Curzio, Edgar. "Development of Test Standards for Continuous Fiber Ceramic Composites in the United States." In Ceramic Transactions Series, 189–205. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118406014.ch17.

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6

McWilliams, Brandon A., and Chian-Fong Yen. "Multi-Scale Modeling of Continuous Ceramic Fiber Reinforced Aluminum Matrix Composites." In Advanced Composites for Aerospace, Marine, and Land Applications, 203–11. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48096-1_17.

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7

McWilliams, Brandon A., and Chian-Fong Yen. "Multi-Scale Modeling of Continuous Ceramic Fiber Reinforced Aluminum Matrix Composites." In Advanced Composites for Aerospace, Marine, and Land Applications, 201–11. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888414.ch17.

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8

Kagawa, Y., and C. Masuda. "Numerical Analysis of the Interface Problem in Continuous Fiber Ceramic Composites." In Computational Materials Design, 257–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-03923-6_9.

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9

Choi, Sung R., and Narottam P. Bansal. "Interlaminar Tension/Shear Properties and Stress Rupture in Shear of Various Continuous Fiber-Reinforced Ceramic Matrix Composites." In Ceramic Transactions Series, 117–34. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118407844.ch11.

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10

Li, Jian Zhang, Li Tong Zhang, Lai Fei Cheng, Yong Dong Xu, Sheng Ru Qiao, Gui Qiong Jiao, Jun Zhang, and Xin Gang Luan. "Materials Characterization in Continuous Fiber-Reinforced Ceramic Composites Served in Simulating Environment." In Composite Materials V, 31–36. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-451-0.31.

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Тези доповідей конференцій з теми "Continuous-Fiber Ceramic Composites (CFCC)":

1

Goettler, Richard W., Donald L. Hindman, Crispin L. DeBellis, and Michael J. Edwards. "Oxide-Oxide Continuous Fiber Ceramic Composites for Gas Turbine Applications." In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-386.

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Oxide-oxide continuous fiber ceramic composites (CFCCs) are being developed by Babcock & Wilcox (B&W) for a number of industrial applications including gas turbine components. Funding for this work is from the U.S. DoE’s CFCC, Ceramic Stationary Gas Turbine (CSGT) and Advanced Turbine Systems (ATS) Programs. A description of the oxide-oxide CFCCs being developed by B&W and their applicability to gas turbine combustor liners will be presented. Results of thermal and stress analyses performed for a combustion rig test at Solar Turbines as part of the CSGT Program and for a preliminary applications assessment for Allison Engine Company as part of the ATS Program will be presented.
2

Corman, Gregory S., Jeffrey T. Heinen, and Raymond H. Goetze. "Ceramic Composites for Industrial Gas Turbine Engine Applications: DOE CFCC Phase 1 Evaluations." In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-387.

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Conceptual design evaluations of the use of continuous fiber ceramic composite (CFCC) turbine shrouds and combustor liners in an industrial gas turbine engine were performed under Phase 1 of the DOE CFCC program. Significant engine performance improvements were predicted with the use of CFCC components. Five composite systems were evaluated for use as shrouds and combustor liners, the results of which are discussed with particular reference to Toughened Silcomp. Several current CFCC materials were judged to be relatively close to meeting the short term performance requirements of such a system. However, additional CFCC property data are required for significant component design optimization and life prediction, two key design steps that must be completed before ceramic composites can be utilized in large gas turbines.
3

More, Karren L., Peter L. Tortorelli, Larry R. Walker, Josh B. Kimmel, Narendernath Miriyala, Jeffrey R. Price, Harry E. Eaton, Ellen Y. Sun, and Gary D. Linsey. "Evaluating Environmental Barrier Coatings on Ceramic Matrix Composites After Engine and Laboratory Exposures." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30630.

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SiC/SiC continuous fiber-reinforced ceramic matrix composite (CFCC) combustor liners having protective environmental barrier coatings (EBCs) applied to the liner working surfaces have been field-tested in a Solar Turbines’ Centaur 50S SoLoNOx engine at the Chevron, Bakersfield, CA engine test site. This latest engine test ran for a total of 13,937h. The EBCs significantly increased the lifetime of the in-service liners compared with uncoated CFCC liners used in previous field-tests. The engine test was concluded when a routine borescope inspection revealed the formation of a small hole in the inner liner. Extensive microstructural evaluation of both the inner and outer liners was conducted after removal from the engine. Post-test analysis indicated that numerous degradation mechanisms contributed to the EBC and CFCC damage observed on the liners, including EBC volatilization, sub-surface CFCC oxidation and recession, and processing defects which resulted in localized EBC spallation and accelerated CFCC oxidation. The characterization results obtained from these field-tested liners have been compared with the analyses of similarly-processed CFCC/EBCs that were laboratory-tested in a high-pressure, high temperature exposure facility (the ORNL “Keiser Rig”) for >6000h.
4

Szweda, A., T. E. Easler, D. R. Petrak, and V. A. Black. "Continuous Fiber Ceramic Matrix Composites for Gas Turbine Applications." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-189.

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Continuous fiber ceramic composites (CFCCs) are being considered as high temperature structural materials for gas turbine applications due to their high temperature capability, toughness, and durability. Polymer impregnation and pyrolysis (PIP) derived CFCCs are one class of these materials that can be fabricated using widely available polymer composite processing methods. This paper will discuss the general PIP fabrication process and thermo-mechanical properties of these materials, and show examples of complex prototype gas turbine components that have been fabricated and evaluated.
5

Bheemreddy, V., L. Dharani, K. Chandrashekhara, G. Hilmas, and W. Fahrenholtz. "Three-Dimensional Micromechanical Modeling of Continuous Fiber Reinforced Ceramic Composites With Interfaces." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88260.

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Continuous fiber reinforced ceramic composites (CFCCs) are widely used in high performance and high temperature applications. The behavior of CFCCs under various conditions is not easily predicted. Micromechanical modeling of CFCCs using a representative volume element (RVE) approach provides useful prediction of the composite behavior. Conventionally, the effect of fiber-matrix interface on effective property prediction of the CFCCs is not considered in the micromechanical modeling approach. In the current work, a comprehensive three-dimensional micromechanical modeling procedure is proposed for effective elastic behavior estimation of CFCCs. Application of the micromechanical model for various interfaces has been considered to evaluate the effect of different interfaces and highlight the applicability of current model. Cohesive damage modeling approach is used to model the crack growth along with fiber bridging. The finite element model is validated by comparing with available data in the literature.
6

van Roode, Mark, William D. Brentnall, Kenneth O. Smith, Bryan D. Edwards, Leslie J. Faulder, and Paul F. Norton. "Ceramic Stationary Gas Turbine Development Program: Third Annual Summary." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-460.

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The goal of the Ceramic Stationary Gas Turbine (CSGT) Development Program, under the sponsorship of the United States Department of Energy (DOE), Office of Industrial Technologies (OIT), is to improve the performance (fuel efficiency, output power, exhaust emissions) of stationary gas turbines in cogeneration through the selective replacement of hot section components with ceramic parts. The program, currently in Phase II focuses on detailed engine and component design, ceramic component fabrication and testing, establishment of a long term materials property data base, the development of supporting nondestructive evaluation (NDE) technologies, and the application of ceramic component life prediction. A 4000 hr engine field test is planned for Phase III of the program. This paper summarizes progress from January 1995 through January 1996. First generation designs of the primary ceramic components (first stage blades and nozzles, combustor liners) for the program engine, the Solar Centaur 50S, and of the secondary metallic components interfacing with the ceramic parts were completed. The fabrication of several components has been completed as well. These components were evaluated in rigs and the Centaur 50S test engine. NTI64 (Norton Advanced Ceramics) and GN-10 (AlliedSignal Ceramic Components) silicon nitride dovetail blades were cold and hot spin tested and engine tested at the baseline nominal turbine rotor inlet temperature (TRIT) of 1010°C. Full scale SiC/SiC continuous fiber-reinforced ceramic matrix composite (CFCC) liners (B.F. Goodrich Aerospace) were also rig tested and engine tested at the nominal baseline TRIT of 1010°C. One of the engine tests, incorporating both the GN-10 blades and the full scale SiC/SiC CFCC liners, was performed for 21.5 hrs (16 hrs at 100% load) with six start/stop cycles. A cumulative 24.5 hrs of engine testing was performed at the end of January, 1996. The ceramic components were in good condition following completion of the testing. Subscale Hexoloy® SA silicon carbide (Carborundum) and enhanced SiC/SiC CFCC (DuPont Lanxide Composites) and Al2O3/Al2O3 CFCC (Babcock & Wilcox) combustor liners were tested to evaluate mechanical attachment, durability and/or emissions reduction potential. The enhanced SiC/SiC CFCC of DuPont Lanxide Composites demonstrated superior durability in subscale combustor testing and this material was subsequently selected for the fabrication of full scale combustor liners for final engine rig testing in Phase II and field testing in Phase III of the program. Enhanced SiC/SiC CFCC liners also showed significantly reduced emissions of NOx and CO when compared with conventionally cooled subscale metallic liners. This observation is believed to apply generally to “hot wall” combustor substrates. The emissions results for the enhanced SiC/SiC CFCC liners were paralleled by similar emissions levels of NOx and CO monitored during engine testing with B.F. Goodrich Aerospace SiC/SiC CFCC combustor liners. NOx levels below 25 ppmv and CO levels below 10 ppmv were measured during the engine testing. Short term (1,000 hrs) creep testing of candidate ceramic materials under approximate nozzle “hot spot” conditions was completed and long term (5000–10,000 hrs) creep testing is in progress. The selected nozzle material, SN-88 silicon nitride, has survived over 5,500 hrs at 1288°C and 186 MPa stress at the end of January, 1996.
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Dean, Anthony J., Gregory S. Corman, Bharat Bagepalli, Krishan L. Luthra, Paul S. DiMascio, and Robert M. Orenstein. "Design and Testing of CFCC Shroud and Combustor Components." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-235.

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This paper presents initial results in the development and testing of SiC-based Continuous Fiber Ceramic Composites (CFCC) materials for combustor and stage 1 shroud components of large utility-class gas turbines. Use of CFCC’s for these components has the potential for increasing output power and thermal efficiency and reducing emissions. First stage turbine shroud components were fabricated using five material systems including three SiC/SiC-Si systems made by silicon melt infiltration (MI), chemical vapor infiltrated (CVI) enhanced SiC-SiC and directed metal oxidation (DIMOX) Al2O3-SiC composite. A combustor liner was made of MI CFCC. Before and after testing the components were inspected by several NDE techniques including IR thermography, resonance testing and visual examination. A novel, high pressure test rig was used to test four shroud components and a combustor liner simultaneously. Components were exposed to hot gas temperature of 1200°C at 12.5 bar in cyclic and steady-state tests. Cyclic testing simulated engine trip conditions with 200 flame-on, flame-off cycles. Steady state testing involved 100 hours of exposure at high temperature and pressure with hot combustion gases. At the conclusion of the first phase of testing there was visible damage to two pieces of one of the material systems. Destructive testing of the components following rig exposure showed little degradation to the MI composite materials. In summary, high pressure combustion rig testing of these components demonstrated excellent performance with little degradation among the material systems.
8

van Roode, Mark, Oscar Jimenez, John McClain, Jeff Price, Vijay Parthasarathy, Kevin L. Poormon, Mattison K. Ferber, and Hua-Tay Lin. "Ceramic Gas Turbine Materials Impact Evaluation." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30505.

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Impact of foreign or domestic material on components in the hot section of gas turbines with ceramic components is a common cause of catastrophic failure. Several such occurrences were observed during engine testing under the Ceramic Stationary Gas Turbine program sponsored by the U.S. Department of Energy. A limited analysis was carried out at Solar Turbines Incorporated (Solar), which involved modeling of the impact in the hot section. Based on the results of this study an experimental investigation was carried out at the University of Dayton Research Institute Impact Physics Laboratory to establish the conditions leading to significant impact damage in silicon-based ceramics. The experimental set up involved impacting ceramic flexure bars with spherical metal particulates under conditions of elevated temperature and controlled velocity. The results of the study showed a better correlation of impact damage with momentum than with kinetic energy. Increased test specimen mass and fracture toughness were found to improve impact resistance. Continuous fiber-reinforced ceramic composite (CFCC) materials have better impact resistance than monolithics. A threshold velocity was established for impacting particles of a defined mass. Post-impact metallography was carried out at Oak Ridge National Laboratory to further establish the impact mechanism.
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Kimmel, Josh, Jeffrey Price, Karren More, Peter Tortorelli, Tania Bhatia, and Gary Linsey. "The Evaluation of CFCC Liners After Field Testing in a Gas Turbine: V." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68961.

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Under the Ceramic Stationary Gas Turbine (CSGT) and Advanced Material Program sponsored by the U.S. Department of Energy (DOE), a team led by Solar Turbines Incorporated (Solar) has successfully designed engines utilizing SiC/SiC continuous fiber-reinforced ceramic composite (CFCC) combustor liners. Their potential for low NOx and CO emissions was demonstrated in ten separate field-engine tests for an accumulated duration of more than 68,000-hours. In the first four field tests, the durability of the CFCC liners was limited primarily by the long-term stability of SiC in the high-pressure steam environment of the gas turbine combustor. Consequently, the need for an environmental barrier coating (EBC) to meet the 30,000-hour life goal was recognized. An EBC developed under the National Aeronautics and Space Administration (NASA) High Speed Civil Transport, Enabling Propulsion Materials (EPM) program was improved, optimized and applied on the SiC/SiC liners by United Technologies Research Center (UTRC) from the fifth field test onwards. Presented in this paper is the evaluation of the field test with a modified EBC using Strontium Aluminum Silicate (SAS) on SiC/SiC CFCC liners after 8,368-hours.
10

Miriyala, Narendernath, Josh Kimmel, Jeffrey Price, Karren More, Peter Tortorelli, Harry Eaton, Gary Linsey, and Ellen Sun. "The Evaluation of CFCC Liners After Field Testing in a Gas Turbine — III." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30585.

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Under the Ceramic Stationary Gas Turbine (CSGT) Program and the Advanced Materials Program, sponsored by the U.S. Department of Energy (DOE), several silicon carbide/silicon carbide (SiC/SiC) combustor liners were field tested in a Solar Turbines Centaur 50S gas turbine, which accumulated approximately 40000 hours by the end of 2001. To date, five field tests were completed at Chevron, Bakersfield, CA, and one test at Malden Mills, Lawrence, MA. The evaluation of SiC/SiC liners with an environmental barrier coating (EBC) after the fifth field test at Bakersfield (13937 hours) and the first field test at Malden Mills (7238 hours) is presented in this paper. The work at Oak Ridge National Laboratory (ORNL) in support of the field tests was supported by DOE’s Continuous Fiber-Reinforced Ceramic Composite (CFCC) Program.

Звіти організацій з теми "Continuous-Fiber Ceramic Composites (CFCC)":

1

R. A. Wagner. Continuous Fiber Ceramic Composites (CFCC). Office of Scientific and Technical Information (OSTI), December 2002. http://dx.doi.org/10.2172/806820.

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2

R. Suplinskas G. DiBona and W. Grant. Continuous Fiber Ceramic Composite (CFCC) Program: Gaseous Nitridation. Office of Scientific and Technical Information (OSTI), October 2001. http://dx.doi.org/10.2172/791414.

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3

Richlen, S., G. M. Caton, M. A. Karnitz, T. D. Cox, and W. Hong. Continuous Fiber Ceramic Composite (CFCC) Program. Inventory of federally funded CFCC R&D projects. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10158788.

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4

Szweda, A. Research & Development of Materials/Processing Methods for Continuous Fiber Ceramic Composites (CFCC) Phase 2 Final Report. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/836562.

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5

Doug Twait and Michael Long. CFCC applications for diesel engine valve guides. DOE Continuous Fiber Ceramic Composite Program. Phase II A/B - Final report. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/761919.

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6

Feinroth, Herbert. Nuclear Energy Research Initiative (NERI) Program Continuous Fiber Wound Ceramic Composite (CFCC) for Commercial Water Reactor Fuel-Technical Progress Report. Office of Scientific and Technical Information (OSTI), January 2000. http://dx.doi.org/10.2172/762094.

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7

Fareed, Ali, and Phillip A. Craig. Continuous Fiber Ceramic Composites. Office of Scientific and Technical Information (OSTI), September 2002. http://dx.doi.org/10.2172/834518.

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8

Bird, James. Continuous fiber ceramic composites. Phase II - Final report. Office of Scientific and Technical Information (OSTI), October 1997. http://dx.doi.org/10.2172/771233.

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9

Sun, J. G., C. Deemer, W. A. Ellingson, T. E. Easler, A. Szweda, and P. A. Craig. Thermal imaging measurement and correlation of thermal diffusivity in continuous fiber ceramic composites. Office of Scientific and Technical Information (OSTI), September 1997. http://dx.doi.org/10.2172/554854.

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10

Richerson, D. W. Technical progress report during Phase 1 of the continuous fiber ceramic composites program. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/143971.

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