SiC陶瓷纤维力学性能评价

State of the Art and Future Directions in SiC Ceramic Fiber Perfomance

耐高温SiC陶瓷纤维是CMCs的主要增强体。SiC纤维必须有适宜的物理、化学、机械性能 ,包括刚度 (杨氏模量 )、强度、抗蠕变性、耐氧化性 ,这些性能是制约CMCs工业应用的重要因素。本文总结了SiC陶瓷纤维各种力学性能状况 ,包括强度、模量与测试温度和室温的关系以及与时效的关系 ,蠕变行为及热处理、氧化、时效对其影响 ,断裂行为及热处理和氧化的影响。最后 。

SiC ceramic fibers are important reinforcing materials of ceramic matrix composites (CMCs).SiC ceramic fibers should have optimal mechanical,physical,and chemical properties.The properties of most interest include stiffness(i.e.,Young's modulus),strength,creep and rupture resistance,oxidation resistance.They are critical to the industry applications of CMCs.This article reviews the state-of-the-art in SiC ceramic fibers.The whole review involves strength and stiffness as a function of test temperature,effects of heat treatment,oxidation and aging on creep behavior and rapture strength.Finally future directions are also recommended about performance of SiC ceramic fibers.