Random chopped fibers in reaction bonded SiC composite: Morphology, etching and reinforcing properties
Random chopped fibers in reaction bonded SiC composite: Morphology, etching and reinforcing properties
复制标题
DOI：
10.1016/j.msea.2012.04.102
复制
发表时间：
2012-08
期刊：
影响因子：
6.4
通讯作者：
Shuang Li;Yumin Zhang;Jiecai Han;Yufeng Zhou
中科院分区：
文献类型：
--
作者：
Shuang Li;Yumin Zhang;Jiecai Han;Yufeng Zhou
为了改善反应烧结SiC陶瓷的力学性能，在SiC/C浆料中引入了无规短切纤维。研究了硅化碳纤维的分布、形态和化学性能。研究了纤维含量对反应烧结碳化硅复合材料力学性能的影响。硅化反应在纤维表面形成了致密的纳米和微米SiC颗粒层。根据酸蚀过程中纤维表面形貌的变化，提出了硅化纤维的结构模型。无规短切纤维的加入提高了复合材料的断裂韧性和弯曲强度，当纤维含量为30 vol.%时，断裂韧性和弯曲强度分别达到峰值5.1MPam0.5和416 MPa。
Random chopped fibers were introduced into SiC/C slurry to improve the mechanical behaviors of reaction bonded SiC ceramics. The distribution, morphology and chemical properties of the siliconized carbon fiber were investigated. The effect of fiber fraction on mechanical behaviors of the reaction bonded silicon carbide composite was studied. The siliconization reaction led to a dense layer of nano and micron SiC particles on the fiber surface. Based on the morphology changes in the acid etching test, a structural model of the siliconized fiber was proposed. The fracture toughness and the flexural strength of the composite were improved by the random chopped fiber, reaching the peak values of 5.1MPam0.5and 416MPa, respectively, at the fiber fraction of 30vol.%.