Fabrication and high temperature tribological properties of WC reinforced W-Cu composites

• Published in: Materials today communications Vol. 28; p. 102550
• Main Authors: Huang, Youting, Li, Xiaowei, Zha, Yuanfei, Zhou, Xiaolong, Peng, Dongliang, Hua, Nengbin, Chen, Wenzhe
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2021
• Subjects: Hot pressing sintering; Temperature; Tribological properties; Vacuum; W-Cu composites; W-Cu composites; Hot pressing sintering; Temperature; Vacuum; Tribological properties
• ISSN: 2352-4928; 2352-4928
• DOI: 10.1016/j.mtcomm.2021.102550

In this study, WC doped W-Cu composites with high hardness and excellent tribological properties were prepared using hot pressing sintering with Cu coated W composite powders. Friction and wear behaviors of W-Cu-WC composites and W-Cu composites against Si3N4 balls at room and high temperatures (e.g., 25 ℃, 700 ℃ and 900 ℃) were investigated using a ball-on-disk high temperature tribometer in vacuum. Results showed that the Vickers hardness of WC doped W-Cu composites (245 HV) was relatively higher than that of the W-Cu composites. The specific wear rate of WC doped W-Cu composites was lower than that of the W-Cu composites in the temperature range of 25–900, and that at 700 °C (56.3 × 10−5 mm3/Nm) was an order of magnitude lower than that of the W-Cu composites. The wear resistance of W-Cu composites doped with WC particles was dramatically improved in vacuum. The dominant wear mechanisms of W-Cu composites were abrasive wear, adhesive wear and delamination at various temperatures, whereas the dominant wear mechanisms of W-Cu-WC composites were abrasive wear and delamination at various temperatures. The data will be made available upon request.