SiC纤维增强AlN-SiC复合材料的制备及力学性能

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Abstract Silicon carbide fiber reinforced AlN-SiC ceramic composite was fabricated by spark plasma sintering (SPS), using AlN, SiC and SiC fibers as main raw materials. By means of metallographic analysis,scanning electron microscopy (SEM) and mechanical properties test, the effects of sintering temperature and content of SiC fibers on the microstructure,phase composition,mechanical properties and thermal conductivity of the composites were studied. The results show that the optimum temperature for preparing AlN-SiC ceramic matrix composites with domestic SiC fibers by SPS method is 1 650 ℃. Adding a small amount of SiC fibers can effectively improve the comprehensive properties of AlN-SiC composite ceramics. When the content of SiC fibers is 5%, the comprehensive property of AlN-SiC composite ceramics is the best, the bending strength is 241.36 MPa, the hardness is 569.48 N, and the fracture toughness is 11.66 MPa·m^1/2.

Key words： ceramic matrix composites spark plasma sintering SiC fiber AlN-SiC composite ceramics mechanical properties

Received: 10 December 2018 Published: 11 July 2019

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TG146.2⁺3

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	Articles by authors
	WANG Hongfei
	LI Guodong
	SUN Yehua
	LI Dan
	XIONG Wei

Cite this article:

WANG Hongfei,LI Guodong,SUN Yehua, et al. Fabrication and mechanical properties of silicon carbide fiber reinforced AlN-SiC composites[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(3): 232-238.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I3/232

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