Effect of carbon fiber coating modification on mechanical properties of rapidly prepared Cf/SiC composite
SUN Yehua1, LI Guodong1, YE Guozhu2, SHI Qi1, ZHANG Yang1, HE Anqing2
1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 2. Hunan Xingsheng Novel Materials Technology Co., Ltd, Zhuzhou 412000, China
Abstract：Cf/SiC composites were fabricated by new rapid forming process and reactive melt infiltration, using SiC powder, phenolic resin powder and coated as well as uncoated carbon fiber felt/cloth as raw materials. Then the surface of Cf/SiC composites were coated by chemical vapor deposition (CVD) SiC coating. The effects of coating modification of the carbon fiber and surface coating on the mechanical properties of Cf/SiC composite were studied by XRD phase analysis, scanning electron microscopy (SEM) and mechanical properties test of composite. The results show that CVD PyC/SiC composite interface coating can improve the mechanical properties of the composite materials by protecting carbon fibers from liquid Si corrosion during reactive melt infiltration. CVD SiC surface coating can improve the bending strength of Cf/SiC composite by filling surface defects, cladding fragile parts, coating debonding and remedying internal defects. The bending strength of carbon fiber with PyC/SiC composites coating increases from 150.90 MPa to 217.96 MPa. By means of CVD SiC surface coating, the bending strength is further improved to 266.94 MPa.
孙晔华, 李国栋, 叶国柱, 史琦, 张洋, 何岸青. 炭纤维涂层改性对快速制备Cf/SiC复合材料力学性能的影响[J]. 粉末冶金材料科学与工程, 2019, 24(3): 248-254.
SUN Yehua, LI Guodong, YE Guozhu, SHI Qi, ZHANG Yang, HE Anqing. Effect of carbon fiber coating modification on mechanical properties of rapidly prepared Cf/SiC composite. Materials Science and Engineering of Powder Metallurgy, 2019, 24(3): 248-254.
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2019, Vol. 24 
