Advanced fibers for high-temperature ceramic composites : advanced materials for the twenty-first century / / Committee on Advanced Fibers for High-Temperature Ceramic Composites, National Materials Advisory Board, Commission on Engineering and Technical Systems, National Research Council

• Record Nr.: UNINA9910970651503321
• Pubbl/distr/stampa: Washington, DC, : National Academy Press, 1998
• ISBN: 9786610186839; 9780309174176; 0309174171; 9781280186837; 1280186836; 9780309569033; 0309569036
• Edizione: [1st ed.]
• Descrizione fisica: 1 online resource (111 p.)
• Collana: Publication NMAB ; ; 494; Compass series
• Disciplina: 620.1/4
• Soggetti: Ceramic-matrix composites; Ceramic fibers; Heat resistant materials
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Bibliographic Level Mode of Issuance: Monograph
• Nota di bibliografia: Includes bibliographical references (p. 87-92).
• Nota di contenuto: CERAMIC FIBERS AND COATINGS -- Copyright -- Preface -- Acknowledgments -- Contents -- Acronyms -- Executive Summary -- APPROACH -- HIGH-TEMPERATURE CERAMIC FIBERS -- Non-Oxide Ceramic Fibers -- Oxide Ceramic Fibers -- FIBER COATINGS -- Coatings for Non-Oxide Fibers -- Coatings for Oxide Fibers -- RECOMMENDATIONS AND IMPACTS -- DISCUSSION OF PRIORITIES -- 1 Introduction -- APPROACH -- POTENTIAL CERAMIC MATRIX COMPOSITE APPLICATIONS -- COMPOSITE MATERIALS -- CERAMIC FIBERS AND COATINGS -- ENGINEERING REQUIREMENTS -- REPORT ORGANIZATION -- 2 Current and Future Needs -- IMPLEMENTATION OF NEW MATERIALS -- Glass Matrix Composites -- SiC Matrix Composites -- ; Oxide/Oxide Composites -- Inhibited Carbon Matrix Composites -- CERAMIC MATRIX COMPOSITE DESIGN AND LIFE PREDICTIONS -- CERAMIC MATRIX COMPOSITE APPLICATIONS AND REQUIREMENTS -- Energy Systems -- Aerospace Systems -- MANUFACTURING REQUIREMENTS -- Reliability and Reproducibility of Fiber Supplies -- Handleability and Processability -- IMPLICATIONS FOR FIBER PROPERTIES -- General Considerations -- Fiber and Interface Requirements -- 3 State of the Art in Ceramic Fiber Performance -- CANDIDATE FIBERS -- Comparison of Fiber Categories -- TEMPERATURE AND TIME DEPENDENCE OFPROPERTIES OF NON-OXIDE FIBERS -- Strength and Stiffness as a Function of Test Temperature -- Room-Temperature Strength and Modulus as a Function of Aging -- Thermal Conductivity (Diffusivity) and Electrical Conductivity (Resistivity) as a Function of Temperature and Aging History -- Creep Behavior of Non-Oxide Fibers and Effects of Heat Treatment, Oxidation, and Aging -- Rupture Behavior of Non-Oxide Fibers in Oxidizing and Non-Oxidizing Environments and the Effects of Heat Treatment and… -- Microstructural Stability -- TEMPERATURE AND TIME DEPENDENCE OF PROPERTIES OF OXIDE FIBERS.; Strength and Stiffness as a Function of Test Temperature -- Room-Temperature Strength and Modulus as a Function of Aging History -- Thermal Conductivity (Diffusivity) and Electrical Conductivity (Resistivity) as a Function of Test Temperature and Aging… -- Creep Behavior of Oxide Fibers -- Microstructural Stability -- PERFORMANCE CHARACTERISTICS COMPARED TO PERFORMANCE GOALS -- RECOMMENDATIONS AND FUTURE DIRECTIONS -- 4 Ceramic Fiber Processing -- NON-OXIDE FIBER PROCESSING -- Preceramic Polymer Processing -- Microstructural Development -- OXIDE FIBER PROCESSING -- Chemical Processing -- Chemistry of Oxide Fiber Precursors -- Basic Aluminum Salts -- Polymeric Aluminoxane -- Dry Spinning -- Pyrolysis -- Heat Treatment and Fiber Microstructure -- RECOMMENDATIONS AND FUTURE DIRECTIONS -- Non-Oxide Fibers -- Oxide Fibers -- 5 Materials and Microstructures -- OPPORTUNITIES FOR FIBER DEVELOPMENT -- POLYCRYSTALLINE OXIDES -- POLYCRYSTALLINE SILICON CARBIDE -- AMORPHOUS FIBERS -- RECOMMENDATIONS AND FUTURE DIRECTIONS -- 6 Interfacial Coatings -- COATINGS FOR NON-OXIDE COMPOSITES -- Carbon Coatings -- Composite Behavior -- Oxidation Behavior -- Boron Nitride Coatings -- Composite Behavior -- Oxidation Behavior -- Alternative Fiber Coatings -- Coating Compositions -- Oxidation Behavior -- Systems Approach to Inhibiting Oxidative Embrittlement -- Coating Processes and Vendors -- Chemical Vapor Deposition -- Vendors -- Alternative Approaches -- OXIDE FIBER COATINGS -- Porous Coatings and Porous Matrix Approaches -- Porous Coatings -- No Coating/Porous Matrix Approach -- Fugitive and Segregant Weakened Interfaces -- Fugitive Interfaces -- Segregant Weakened Interfaces -- Dense Oxide Fiber Coatings -- Nonreactive Oxides -- Layered Oxides -- Weakly Bonded, Nonlayered Oxides -- Coating Processes and Vendors -- Immiscible Liquid Coating Technique.; Heterocoagulation Technique -- RECOMMENDATIONS AND FUTURE DIRECTIONS -- Non-Oxide Fiber Coatings -- Oxide Fiber Coatings -- Porous Coatings and Porous Matrix Approaches -- Fugitive and Segregant Weakened Interfaces -- Dense Oxide Fiber Coatings -- Coating Processes and Vendors -- 7 Cost Issues -- PRICE VS. COST -- TYPES OF COST -- Variable Costs -- Fixed Costs -- The Bridging Factor-Cycle Time -- GENERAL FIBER MANUFACTURING COSTS -- MANUFACTURING CERAMIC FIBERS -- OXIDES VS. NON-OXIDES -- FINDINGS -- Relationship between Price and Volume -- Is Fiber Price ; Really the Key Issue? -- Improving Performance vs. Lowering Prices -- System Costs -- Implementation Costs -- CONCLUSIONS -- RECOMMENDATIONS AND FUTURE DIRECTIONS -- Improving Fiber Performance -- Reducing the Risk of Commercializing Ceramic Fibers -- Expanding the Potential Market -- 8 Recommendations and Future Directions -- ENGINEERING DATA -- FIBER COATINGS -- Coatings for Non-Oxide Fibers -- Coatings for Oxide Fibers -- DEVELOPMENT OF OXIDE FIBERS -- DEVELOPMENT OF NON-OXIDE FIBERS -- MANUFACTURING COSTS -- PRIORITIES -- References -- Biographical Sketches of Committee Members.
• Sommario/riassunto: High-temperature ceramic fibers are the key components of ceramic matrix composites (CMCs). Ceramic fiber properties (strength, temperature and creep resistance, for example)-along with the debonding characteristics of their coatings-determine the properties of CMCs. This report outlines the state of the art in high-temperature ceramic fibers and coatings, assesses fibers and coatings in terms of future needs, and recommends promising avenues of research. CMCs are also discussed in this report to provide a context for discussing high-temperature ceramic fibers and coatings.