Write a short note on ceramic fibres
Answers
Answer:
Ceramic fibres are small-dimension filament or thread composed of a ceramic material, usually alumina and silica, used in lightweight units for electrical, thermal, and sound insulation;
Explanation:
The use of ceramic fibers in the composite applications is taking attraction/attention since the last decades. In particular, continuous ceramic fibers/filaments are generally employed in high-temperature applications instead of metals due to their high thermal tolerance and corrosion resistance. Ceramic fibers may be produced in various forms like blankets, felts, bulk fibers, vacuum-formed or cast shapes, paper, and textiles depending on the application area [55]. The existence of ceramic fibers considerably improves both physical and mechanical properties of CMCs and satisfies the unity of the composites through matrix cracking that leads to the increase of composite's tolerance to failure. From the point of view of industrial implementation, ceramic-fiber-reinforced composites are utilized in many different commercial products such as aircraft engine components (turbine combustors, compressors, and exhaust nozzles), automotive and gas turbine elements, aerospace missiles, heat exchangers, hot gas filters, rocket nozzles, gasket, and wrapping insulations [55,56].
There are plenty of studies available in the literature that focus on the performance of various ceramic fibers in CMCs. Depending on the requirements (mechanical, physical, or thermal), oxide, nonoxide, or other types of ceramic filaments find applications in many cases.