炭纤维涂层改性对快速制备C<sub>f</sub>/SiC复合材料力学性能的影响

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Abstract C_f/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 C_f/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 C_f/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 C_f/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.

Key words： C_f/SiC composite CVD (chemical vapor deposition) interface coating surface coating bending strength

Received: 23 November 2018 Published: 11 July 2019

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	SUN Yehua
	LI Guodong
	YE Guozhu
	SHI Qi
	ZHANG Yang
	HE Anqing

Cite this article:

SUN Yehua,LI Guodong,YE Guozhu, et al. Effect of carbon fiber coating modification on mechanical properties of rapidly prepared C_f/SiC composite[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(3): 248-254.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I3/248

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