制备温度对镀Cr金刚石/Ag复合材料界面结构和导热性的影响

doi:10.13251/j.issn.0254-6051.2025.10.009

金属热处理 ›› 2025, Vol. 50 ›› Issue (10): 62-69.DOI: 10.13251/j.issn.0254-6051.2025.10.009

制备温度对镀Cr金刚石/Ag复合材料界面结构和导热性的影响

王永康, 苏振赫, 张志远, 李建伟

江苏大学机械工程学院, 江苏镇江 212013

收稿日期:2025-04-22 修回日期:2025-08-14 出版日期:2025-10-25 发布日期:2025-11-04
通讯作者: 李建伟,副教授,E-mail:1000004764@ujs.edu.cn
作者简介:王永康(2000—),男,硕士研究生,主要研究方向为金刚石增强银基复合材料,E-mail:wsj1299074253@outlook.com。
基金资助:
国家自然科学基金(51801073);齐鲁工业大学(山东省科学院)产学研协同创新基金(2020-CXY38)

Effect of preparation temperature on interfacial structure and thermal conductivity of Cr-coated diamond/Ag composites

Wang Yongkang, Su Zhenhe, Zhang Zhiyuan, Li Jianwei

School of Mechanical Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China

Received:2025-04-22 Revised:2025-08-14 Online:2025-10-25 Published:2025-11-04

摘要/Abstract

摘要： 采用磁控溅射技术在金刚石表面镀覆150 nm厚的Cr层,并采用低气压渗透法,通过调控不同温度(1050、1100、1150 ℃),制备金刚石(Cr)/Ag复合材料,研究不同制备温度对复合材料性能的影响。结果表明,制备温度对金刚石(Cr)/Ag复合材料的导热系数有显著影响。导热系数随着制备温度的升高而逐渐增加,在1150 ℃时达到最大值757 W/(m·K);在制备温度≥1100 ℃时,热膨胀系数低于5.5×10^-6 K^-1。此外,利用第一性原理计算了金刚石(Cr)/Ag界面处的电子态密度,表明界面处生成的Cr₃C₂能有效增强界面结合。

关键词: 金刚石/Ag复合材料, 界面结合, 热处理, 热物理特性, 第一性原理

Abstract: A 150 nm-thick Cr layer was deposited on the diamond surface via magnetron sputtering. Subsequently, diamond(Cr)/Ag composites were fabricated by low-pressure infiltration method at different temperatures (1050, 1100, and 1150 ℃). The effect of varying preparation temperatures on the composites properties was investigated. The results show that the thermal conductivity of the composites gradually increases with the rise of preparation temperature, reaching a maximum of 757 W/(m·K) at 1150 ℃. When the preparation temperature is greater than or equal to 1100 ℃, the coefficient of thermal expansion remains below 5.5×10^-6 K^-1. These findings indicate that the preparation temperature of diamond(Cr) particles has a significant impact on the thermal conductivity of diamond(Cr)/Ag composites. In addition, first-principles calculations were used to analyze the electronic density of states at the diamond(Cr)/Ag interface, confirming that Cr₃C₂ formed at the interface after heat treatment can effectively enhance interfacial bonding.

Key words: diamond/Ag composites, interfacial bonding, heat treatment, thermophysical properties, first-principles

中图分类号:

TB331

王永康, 苏振赫, 张志远, 李建伟. 制备温度对镀Cr金刚石/Ag复合材料界面结构和导热性的影响[J]. 金属热处理, 2025, 50(10): 62-69.

Wang Yongkang, Su Zhenhe, Zhang Zhiyuan, Li Jianwei. Effect of preparation temperature on interfacial structure and thermal conductivity of Cr-coated diamond/Ag composites[J]. Heat Treatment of Metals, 2025, 50(10): 62-69.

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制备温度对镀Cr金刚石/Ag复合材料界面结构和导热性的影响

Effect of preparation temperature on interfacial structure and thermal conductivity of Cr-coated diamond/Ag composites

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