液相网络及相对密度对SiC<sub>p</sub>/2024复合材料显微组织与力学性能的影响

doi:10.11896/cldb.21120017

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Abstract In order to obtain SiC_p/2024 composites with high mechanical properties, 37vol% SiC_p/2024 composites were prepared by powder metallurgy method in this work. The effects of hot pressing temperature and secondary hot pressing on microstructure and mechanical properties of the composites were studied. The results show that when the hot-pressing temperature is 530 ℃, the composite has a moderate liquid phase (3.28vol%) and relative density (99.21%), and the mechanical properties of T6 heat-treated composites reached a higher level (480 MPa tensile strength and 0.216% elongation). Furthermore, the liquid phase network in the composites was further refined and dispersed by secondary hot pressing at 540 ℃, the relative density increased from 99.30% to 99.45%, the mechanical properties of the T6 composites reached the hig-hest level (540 MPa tensile strength and 0.515% elongation). The results analysis shows that a medium,fine and dispersed liquid phase network and a higher relative density in the composites is the key to the SiC_p/2024 composites with good mechanical properties.

Key words： SiC_p/2024 composite powder hot pressing liquid phase network relative density mechanical property

Published: 25 July 2023 Online: 2023-07-24

CLC number:

TB333

Fund:National Natural Science Foundation of China (51861020,51741103).

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	LI Xiaolong
	WANG Tan
	ZUO Xiaoqing
	DAI Biao
	ZHOU Yun

Cite this article:

LI Xiaolong,WANG Tan,ZUO Xiaoqing, et al. Effects of Liquid Network and Relative Density on Microstructure and Mechanical Properties of SiC_p/2024 Composites[J]. Materials Reports, 2023, 37(14): 21120017-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21120017 OR http://www.mater-rep.com/EN/Y2023/V37/I14/21120017

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