Preparation of WS2-Cu Composites Under Different SPS Sintering Temperatures and Their Friction and Wear Properties
JIANG Ye1, YAN Jianhui1,2,3, LI Maojian1
1 College of Materials Science and Technology, Hunan University of Science and Technology, Xiangtan 411201, China 2 Hunan Provincial Key Defense Laboratory of High Temperature Wear Resisting Materials and Preparation Technology, Hunan University of Science and Technology, Xiangtan 411201, China 3 Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan 411201, China
Abstract: WS2 powder coated with copper was prepared using electroless plating technology. The WS2-Cu matrix composites were prepared by spark plasma sintering technique (SPS) using pure Cu and Cu coated WS2 powders as raw materials. The microstructure, mechanical properties and friction and wear properties of WS2-Cu matrix composites prepared at different sintering temperatures were studied. The results show that WS2 is distributed uniformly in the copper matrix and the interface between Cu and WS2 bond well. With an increase in the sintering temperature, the hardness of composites shows an increasing trend. WS2-Cu composites prepared at 500—750℃ have low friction coefficients (0.15—0.18). However, the composites prepared over 750℃ have high friction coefficients (0.42—0.54). The composites prepared at 700—750℃ has the lowest wear rate of (1.6—1.8)×10-5 mm3/(N·m). The surface treatment of WS2 powder coated with Cu improves the wear resistance of WS2-Cu composites. The suitable SPS sintering temperature for preparing WS2-Cu composites is 700—750℃. The plastic deformation, oxidative wear and adhesive wear were occurred during the friction and wear process in the WS2-Cu composites. There was a significant abrasive wear on the wear surface of the WS2-Cu composite when the WS2 was transformed into W.
蒋晔, 颜建辉, 李茂键. 不同SPS烧结温度下制备WS2-Cu复合材料及其摩擦磨损性能[J]. 材料导报, 2020, 34(18): 18025-18029.
JIANG Ye, YAN Jianhui, LI Maojian. Preparation of WS2-Cu Composites Under Different SPS Sintering Temperatures and Their Friction and Wear Properties. Materials Reports, 2020, 34(18): 18025-18029.
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