TY - JOUR
T1 - Effect of Cu-coated diamond on the formation of Cu–Sn-based diamond composites fabricated by laser-powder bed fusion
AU - Tao, Yakun
AU - Sun, Wucheng
AU - Gan, Jie
AU - Wang, Xiaoqiang
AU - Zhou, Yan
AU - Duan, Longchen
AU - Wen, Shifeng
AU - Shi, Yusheng
PY - 2024/2
Y1 - 2024/2
N2 - 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[sbnd]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). © 2023 Elsevier Ltd. All rights reserved.
AB - 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[sbnd]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). © 2023 Elsevier Ltd. All rights reserved.
KW - Deep learning
KW - Densification
KW - Diamond thermal damage
KW - Diamond/Cu–Sn composite
KW - Frictional wear coefficient
KW - Laser-powder bed fusion (L-PBF)
UR - http://www.scopus.com/inward/record.url?scp=85179881845&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85179881845&origin=recordpage
U2 - 10.1016/j.ijrmhm.2023.106526
DO - 10.1016/j.ijrmhm.2023.106526
M3 - RGC 21 - Publication in refereed journal
SN - 0263-4368
VL - 119
JO - International Journal of Refractory Metals and Hard Materials
JF - International Journal of Refractory Metals and Hard Materials
M1 - 106526
ER -
