CuS-Fe2O3纳米复合薄膜的制备、表征和摩擦学性能

采用溶胶-凝胶法制备了纳米CuS-Fe2O3复合薄膜,研究了其微结构和摩擦学性能,并探讨了复合薄膜的磨损机制。用XRD,XPS,及AFM研究了薄膜的晶体结构、化学价态与表面形貌,用UMT-2研究了薄膜的摩擦学性能。研究结果表明,所制备的薄膜是均匀致密的,表面粗糙度为0.30 nm,CuS为粒径20 nm的正六面体结构,并且均匀分散在Fe2O3基体中;薄膜与GCr15不锈钢球对磨过程中表现出了很好的耐磨抗摩性能。CuS的摩尔分数为8%时的CuS-Fe2O3复合膜在滑动速度为150 mm/m in,载荷为1.5 N的条件下,摩擦因数为0.08,磨损寿命为4 200次,通过SEM观察薄膜的膜痕发现薄膜的磨损机制主要是轻微的擦伤、粘着转移和磨粒磨损。

Prepation and Tribological Investigation of CuS-Fe2O3 Nanocomposite Thin Films

CuS-Fe2O3 nanocomposite thin films were prepared by a facile sol-gel process. The mircostructure, morphology, and tribological properties of the CuS- Fe2O3 films were investigated via X-ray diffractometry, Xray photoelectron spectroscopy, atomic force microscopy and UMT-2 tribometer. The results show that the surfaces of the films are uniform and compact with a root-mean square roughness about 0. 30 nm. CuS particles I hextognal phase are dispersed in Fe2O3 matrix with a size of about 20 nm in diameter. The films sliding against GCr15 steel ball display an excellent wear-resistance and friction-reduction performance. With mole ration of 8% CuS ,the friction coefficient is only 0. 08 and the wear life is about 4 200 sliding cycles at a sliding speed of 150 mm/min and a load of 1.5 N. SEM observation suggests that the wear mechanism of the films is slight scuffing, adhesion and abrasion.