Copper/diamond composite materials prepared via powder metallurgy were used to study the influence of different contents of the active element Nb on the modification mechanism of the copper interface and the thermal conductivity of the copper/diamond composite material.The interface and thermal conductivity of the composite material were characterized by XRD,SEM,EDS,and thermal conductivity coefficient tester.The results showed that with the addition of Nb content,a carbide interface layer could be formed during the sintering process,and the defects at the interface between copper and diamond gradually decreased,and the interface bonding gradually improved.When the content was 1％,the thermal conductivity of the composite material reached 370.3 W/(m·K),which was 1.34 times higher than that of the pure copper/diamond composite material.However,when the content exceeded 1％,the thickness of the niobium carbide intermediate layer increased.Due to the low thermal conductivity of niobium carbide itself,the thermal conductivity of the composite material decreased.
关键词
铜复合材料/真空热压烧结/热导率/粉末冶金
Key words
copper composite materials/vacuum hot pressing sintering/thermal conductivity/powder metallurgy
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基金项目
广西自然科学基金(2021GXNSFAA220088)
广西自然科学基金(2021GXNSFBA220080)
中央引导地方科技发展资金专项(桂科ZY21195030)
2022年广西科技基地和人才专项(桂科AD21238010)
广西重点研发计划项目(桂科AB22080015)
国家自然科学基金资助项目(51965005)
国家自然科学基金资助项目(51761002)
国家自然科学基金资助项目(51961008)
广西有色金属及特色材料加工重点实验室项目(2021GXMPSF06)
Special Fund for Guiding Local science and Technology Development(Guike ZY21195030)
2022 Guangxi Science and Technology Base and Talent Project(Guike AD21238010)
Guangxi Key Research and Development Project(Guike AB22080015)
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