烧结温度对碳聚合物点/铜复合材料显微组织与性能的影响

doi:10.19976/j.cnki.43-1448/TF.2021066

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摘要以碳聚合物点(carbonized polymer dot,CPD)作为铜的增强体,采用粉末冶金法制备碳聚合物点/铜复合材料,分析和测试不同烧结温度(350~750 ℃)下CPD/Cu复合材料的致密度、硬度、拉伸性能与耐磨性能。结果表明：CPD在铜基体中均匀分散,并且CPD壳体网络中的非晶碳有利于CPD与铜基体形成良好的界面结合,CPD/Cu复合材料的致密化程度高,相对密度达到95%以上。CPD/Cu复合材料的力学性能和摩擦磨损性能均明显高于纯Cu。随烧结温度升高,CPD/Cu复合材料的致密度、硬度、抗拉强度先升高后降低,在550 ℃烧结的复合材料具有最佳的综合性能,硬度(HV)比Cu提高49.4、抗拉强度(334.0 MPa)比纯Cu提高约25.6%,体积磨损率为17.67×10^-12m³/m。

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	杨亚杰
	李兆杰
	赵文敏
	鲍瑞
	易健宏

关键词 ：粉末冶金, 碳聚合物点, 铜基复合材料, 力学性能, 摩擦性能

Abstract：Carbon polymer dot/copper composites were prepared by powder metallurgyusing carbon polymer dot (CPD) as copper reinforcement. The density, hardness, tensile properties and wear resistance of CPD/Cu composites at different sintering temperatures (350-750 ℃) were analyzed and measured. The results show that CPD is uniformly dispersed in the copper matrix, and the amorphous carbon in the CPD shell network is conducive to the formation of a good interface bond between the CPD and the copper matrix. The relative density of the CPD/Cu matrix composites is more than 95%, indicating that the compactness of the composites is high and the porosity is small. The mechanical properties and friction and wear properties of CPD/Cu composites are significantly higher than those of pure Cu materials. With the increase of sintering temperature, the density, hardness and tensile strength of the CPD/Cu composites show the rules of increase and then decrease. The hardness is higher than Cu matrix by 49.4 HV, the composite sintered at 550 ℃ obtains the best comprehensive properties, the tensile strength (334.0 MPa) is about 25.6% higher than that of pure Cu, and the volume wear rate is 17.67×10^-12m³/m.

Key words： powder metallurgy carbonized polymer dot copper matrix composites mechanical properties friction properties

收稿日期: 2021-07-29 出版日期: 2021-12-22

ZTFLH:

TB333

基金资助:国家自然科学基金资助项目(52064032,52174345); 云南省科技厅重大科技项目(2019ZE001,02002AB080001); 钨资源高效开发及应用教育部工程研究中心开放课题(W-2021ZD001)

通讯作者: 鲍瑞,教授,博士。电话：13888480327;E-mail: baorui@kust.edu.cn

引用本文:

杨亚杰, 李兆杰, 赵文敏, 鲍瑞, 易健宏. 烧结温度对碳聚合物点/铜复合材料显微组织与性能的影响[J]. 粉末冶金材料科学与工程, 2021, 26(6): 537-546.
YANG Yajie, LI Zhaojie, ZHAO Wenmin, BAO Rui, YI Jianhong. Effects of sintering temperature on microstructure and properties of carbon polymer dot/copper composites. Materials Science and Engineering of Powder Metallurgy, 2021, 26(6): 537-546.

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http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2021066 或 http://pmbjb.csu.edu.cn/CN/Y2021/V26/I6/537

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