含(PyC/SiC)n多层界面SiCf/SiC Mini复合材料的制备与拉伸行为

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Abstract (PyC/SiC)₄ or (PyC/SiC)₈ multi-layer interphases were introduced into two types of SiC fiber bundles by CVI method and further densified with SiC to obtain SiC_f/SiC minicomposites. The effects of fiber types and interface types on mechanical properties and fracture mechanism of SiC_f/SiC minicomposites were studied. The results show that, the densified SiC_f/SiC minicomposite is a whole. In the minicomposites, a clear interface layer with an uniform thickness can be observed between fiber and matrix. The maximum tensile strength of A/(PyC/SiC)₄/SiC, B/(PyC/SiC)₄/SiC and A/(PyC/SiC)₈/SiC minicomposites are 466, 350 and 330 MPa respectively, with the ultimate tensile strain of 0.519%, 0.219% and 0.330%, respectively. In addition, the fracture morphologies of minicomposites and the length of pull-out fiber with different types of reinforced fiber and interface are quite different, indicated a different fracture mode. The A/(PyC/SiC)₄/SiC fractures in Model Ⅱ, B/(PyC/SiC)₄/SiC and A/(PyC/SiC)₈/SiC fracture in ModelⅠ.

Key words： (PyC/SiC)_n multilayered interphases SiC_f/SiC minicomposites tensile strength elongation fracture mechanism

Received: 14 March 2018 Published: 19 July 2019

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	Articles by authors
	YANG Ping
	ZHANG Ruiqian
	LI Yue
	CHEN Zhaoke
	HE Zhongbei
	LIU Guiliang
	FU Daogui
	SUN Wei
	WANG Yalei
	XIONG Xiang

Cite this article:

YANG Ping,ZHANG Ruiqian,LI Yue, et al. Preparation and tensile behavior of SiC_f/SiC minicomposites with (PyC/SiC)_n multilayered interphases[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(6): 553-561.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I6/553

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