CuCoCrNi/金刚石复合材料超快速高温烧结致密化行为

doi:10.19976/j.cnki.43-1448/TF.2025043

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Abstract In this study, ultrafast high-temperature sintering was employed to fabricate diamond composites using CuCoCrNi multi-principal element alloy as the bonding phase. The effects of sintering parameters on the degree of diamond graphitization and densification behavior were investigated with X-ray diffractometer, scanning electron microscope, Raman spectroscope, and friction experiments. The results demonstrate that ultrafast high-temperature sintering can produce CuCoCrNi/diamond composites with low graphitization (I_G/I_D=0.201 4), low friction factor (μ=0.06), and relative density of 91.22% in a short time by adopting suitable process parameters. Joule heating generated by high current density and localized thermal focusing significantly enhance the sintering driving force, promoting the bonding of Cr in the matrix with the diamond surface to form an interface layer is conducive to the densification of the composites. However, too high energy input can cause diamond particle agglomeration and severe diamond graphitization (I_G/I_D>1.0), reduce the affinity and the interfacial bonding strength between Cr element and diamond particle surface, leading to the decrease of density and friction properties (μ>0.1) of diamond composites.

Key words： ultrafast high-temperature sintering multi-principal element alloy diamond composite densification behavior friction property

Received: 30 April 2025 Published: 06 January 2026

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	LI Lin
	YANG Zihan
	WANG Ruochong
	LIU Yong

Cite this article:

LI Lin,YANG Zihan,WANG Ruochong, et al. Densification behavior of CuCoCrNi/diamond composites under ultrafast high-temperature sintering[J]. Materials Science and Engineering of Powder Metallurgy, 2025, 30(6): 514-523.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2025043 OR http://pmbjb.csu.edu.cn/EN/Y2025/V30/I6/514

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