By National Research Council, Division on Engineering and Physical Sciences, National Materials Advisory Board, Commission on Engineering and Technical Systems, Committee on Advanced Fibers for High-Temperature Ceramic Composites
High-temperature ceramic fibers are the most important parts of ceramic matrix composites (CMCs). Ceramic fiber houses (strength, temperature and creep resistance, for example)-along with the debonding features in their coatings-determine the houses of CMCs. This record outlines the state-of-the-art in high-temperature ceramic fibers and coatings, assesses fibers and coatings when it comes to destiny wishes, and recommends promising avenues of study. CMCs also are mentioned during this report back to supply a context for discussing high-temperature ceramic fibers and coatings.
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Additional resources for Advanced Fibers for High-Temperature Ceramic Composites: Advanced Materials for the Twenty-First Century
A. DiCarlo, Creep limitations of current polycrystalline ceramic fibers, Pp. 213–222. Copyright© 1994, with permission from Elsevier Science. The Dow Corning and Carborundum fibers are comparable in terms of microstructure in the final product, except that the grain size of the Carborundum material is three to ten times the size of the Dow Corning fiber. The resultant creep resistance scales as one would expect for diffusional creep. , 1994). However, a quantitative explanation for the observed creep rates across the various classes of SiC fibers remains About this PDF file: This new digital representation of the original work has been recomposed from XML files created from the original paper book, not from the original typesetting files.
The second is based on material durability requirements, which are derived from time and temperature profiles (Figure 2-2). The first category is useful because the energy sector could provide a large enough market to reduce fiber costs. Implementation in this sector is, therefore, crucial. The second category facilitates setting goals for fiber properties. , power generation) than the aerospace industry. Potential high volume industrial applications could create enough demand for CMCs to lower fiber costs significantly, which would make more cost sensitive applications possible.
Ceramic fibers are subjected to temperature extremes and unique environments during processing (Table 2-5). Obviously fibers are needed that do not degrade during exposure to composite processing environments. IMPLICATIONS FOR FIBER PROPERTIES Studying the temperature and time-at-temperature requirements for potential CMC applications (Figure 2-2) can provide a perspective on fiber property requirements. It should be noted, however, that material temperature is a function not only of the temperature of the service environment, but also of material thermal conductivity and engineered cooling strategies.
Advanced Fibers for High-Temperature Ceramic Composites: Advanced Materials for the Twenty-First Century by National Research Council, Division on Engineering and Physical Sciences, National Materials Advisory Board, Commission on Engineering and Technical Systems, Committee on Advanced Fibers for High-Temperature Ceramic Composites