Tribological properties of surface modified Cu nanoflakes prepared by plasma assisted ball milling
JI Guang-pu1,2, HE Xiu-fang1,2, LIAO Hai-feng1,2, DAI Le-yang1,2, SUN Di1,2, CAI Gu-chang3
1. Fujian Provincial Key Laboratory of Naval Architecture and Ocean Engineering, School of Marine Engineering, Jimei University, Xiamen 361021, Fujian, China;
2. Fujian Engineering Research Center of Marine Engine Detecting and Remanufacturing, Xiamen 361021, Fujian, China;
3. Unit 73131 of Chinese People's Liberation Army, Zhangzhou 363113, Fujian, China
Abstract：Surface modified nano-flake Cu powder was prepared by plasma assisted ball milling by adding stearic acid as a process agent and its tribological properties were tested. The results indicate that the Cu particle exhibiting an excellent superplasticity has severe plastic deformation induced by a synergistic effect of plasma high-rate heating and electroplasticity, and the 20nm-thick flake-like Cu particles are obtained after 5h milling time of plasma milling. These nano-flake Cu particles owning oleophobicity characteristics exhibit good dispersion in the 40CA marine lubricating oil due to that the surface of Cu nano-flake adsorbs and chemically bonds with some non-polar groups under the plasma assisted ball milling with stearic acid. The severe deformation of the nano-flake Cu particles displaying high activation are easily adsorbed and spread on the surface of the friction counterpart in the process of sliding, which promotes a better wear resistance for compound lubricant with nano-flake Cu addition. Under a high rotating speed and excessive load, the nano-flake Cu powder provides excellent friction-reducing and self-repairing characters and improves the anti-wear performance under an extreme pressure condition.
冀光普, 何秀芳, 廖海峰, 戴乐阳, 孙迪, 蔡谷昌. 等离子体辅助球磨制备表面修饰片状纳米Cu粉及摩擦学性能[J]. 材料工程, 2019, 47(6): 114-120.
JI Guang-pu, HE Xiu-fang, LIAO Hai-feng, DAI Le-yang, SUN Di, CAI Gu-chang. Tribological properties of surface modified Cu nanoflakes prepared by plasma assisted ball milling. Journal of Materials Engineering, 2019, 47(6): 114-120.
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