Ce对原位自生TiB<sub>2</sub>/6061复合材料显微组织及力学性能的影响

doi:10.11896/cldb.24070164

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Abstract In-situ synthesized 3% TiB₂/6061 composites and 0.3% Ce-3% TiB₂/6061 composites were fabricated by Al-K₂TiF₆-KBF₄ system. The microstructure of the composites was observed with SEM and TEM, and the mechanical properties of the composites were tested by room temperature tensile testing. The effect of Ce on the microstructure and tensile properties of in-situ synthesized TiB₂/6061 composites was studied. Microstructure observation reveals that the interface between TiB₂ particles and 6061 matrix is clean and the interfacial bonding is stable. Ce effected the final morphology of TiB₂ particles by adsorbing on different crystal planes, chamfering planes and arc corners appeared on the surface of TiB₂ particles. The addition of Ce alleviated particle agglomeration, the size of particle agglomeration decreased by 38.68% and the grain size of the composites decreased, with an average grain size decreased by 56.50%. The tensile test shows that the tensile properties of the 3% TiB₂/6061 composites are significantly improved by the addition of Ce, with YS increased by 66.71%, UTS increased by 35.22%, and EL increased by 17.59%. There are three main strengthening mechanisms in the composites: fine-grain strengthening, Orowan strengthening, and thermal expansion strengthening.

Key words： In-situ synthesized TiB₂/6061 composites Ce microstructure tensile property

Published: 10 January 2026 Online: 2026-01-09

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TB331

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	Articles by authors
	JIA Jing
	ZHUANG Weibin
	LI Jinghui
	CAO Qing
	LIU Jingfu

Cite this article:

JIA Jing,ZHUANG Weibin,LI Jinghui, et al. Effect of Ce on Microstructure and Tensile Properties of In-situ Synthesized TiB₂/6061 Composites[J]. Materials Reports, 2026, 40(1): 24070164-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24070164 OR https://www.mater-rep.com/EN/Y2026/V40/I1/24070164

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