Effect of Cu-coated diamond on the formation of Cu-Sn-based diamond composites fabricated by laser-powder bed fusion

被引:10
作者
Tao, Yakun [1 ]
Sun, Wucheng [1 ]
Gan, Jie [2 ]
Wang, Xiaoqiang [3 ]
Zhou, Yan [4 ]
Duan, Longchen [1 ]
Wen, Shifeng [3 ]
Shi, Yusheng [3 ]
机构
[1] China Univ Geosci Wuhan, Fac Engn, Natl Ctr Int Res Deep Earth Drilling & Resource De, Wuhan 430074, Peoples R China
[2] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong 999077, Peoples R China
[3] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
[4] Huazhong Univ Sci & Technol, Natl Ctr Technol Innovat Digital Construct, Sch Civil & Hydraul Engn, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
Laser-powder bed fusion (L-PBF); Diamond/Cu-Sn composite; Densification; Deep learning; Diamond thermal damage; Frictional wear coefficient; MECHANICAL-PROPERTIES; THERMAL-CONDUCTIVITY; METAL; MICROSTRUCTURE; FE;
D O I
10.1016/j.ijrmhm.2023.106526
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this study, Cu-Sn-based diamond composites were fabricated using L-PBF. The effects of the Cu-coated diamond on the melt-pool evolution, diamond-metal matrix bonding, thermal damage, and friction behavior of Cu in the Cu-Sn-based diamond composites were investigated. Moreover, the optimum L-PBF parameters for processing Cu-coated diamond/Cu-Sn composites were investigated. A convolutional neural network based on deep learning was used to process laser-scanned diamond images and evaluate the diamond thermal damage by model-feature visualization. The thermally damaged Cu-coated diamond and percentage of severely damaged parts were reduced compared to those of the uncoated diamond. Thick Cu coating changed the wettability of the diamond and matrix, thereby increasing the friction of the molten pool and unmelted metal particles and introducing the friction of the Cu microfluidic flow on the diamond. Hence, the mechanical holding force of the Cu-Sn alloy matrix on the diamond substantially increased, and the bending strength of the Cu-coated diamond/Cu-Sn composites fabricated using L-PBF reached 720 MPa, which is approximately twice that of diamond/Cu-Sn (365 MPa).
引用
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页数:13
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