稀释剂含量对自蔓延高温合成金刚石表面钨层的影响

doi:10.19976/j.cnki.43-1448/TF.2025053

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Abstract The tungsten layer on the surface of diamond was prepared using WO₃, Mg, and diamond powders as the reaction system and NaCl as the diluent by the self-propagating high-temperature synthesis technology. The adiabatic temperature change was achieved by regulating the NaCl content, and its effects on the coverage radio and thickness of the tungsten layer on the diamond surface were systematically studied. The results show that the coverage radio and thickness of the tungsten layer on the diamond surface increase with the increasing adiabatic temperature. Under the condition that the mass ratio of WO₃, diamond, Mg, NaCl is 1:0.53:0.34:0.13, when the adiabatic temperature reaches 3 569 K, a tungsten layer with a coverage radio of approximately 82%, a thickness of approximately 340 nm and uniform distribution can be obtained. Moreover, the unique instantaneous high-temperature-rapid cooling characteristic of self-propagating high-temperature synthesis effectively improves the stability of diamond, and therefore no obvious graphitization is observed.

Key words： surface modification of diamond self-propagating high-temperature synthesis adiabatic temperature tungsten coating graphitization of diamond

Received: 17 June 2025 Published: 06 January 2026

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	ZHAO Zhuocong
	LIU Yong
	WANG Li
	YANG Zihan

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ZHAO Zhuocong,LIU Yong,WANG Li, et al. The influence of diluent content on the tungsten layer on the surface of self-propagating high-temperature synthetic diamond[J]. Materials Science and Engineering of Powder Metallurgy, 2025, 30(6): 557-564.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2025053 OR http://pmbjb.csu.edu.cn/EN/Y2025/V30/I6/557

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