结构、力学以及摩擦学特性
(1. 重庆大学 材料科学与工程学院，重庆 400044；2. 重庆科技学院 冶金与材料工程学院，重庆 401331；
3. Teer Coatings Ltd., West Stone House, Berry Hill Industrial Estate, Droitwich, Worcestershire WR9 9AS, UK)
摘 要: 采用反应非平衡磁控溅射技术制备出一系列LY12铝合金基CrTiAlN多层涂层，并通过X射线衍射仪、纳米压痕仪以及多功能摩擦磨损测试仪来研究CrTiAlN涂层的结构、力学以及摩擦学特性。结果表明：CrTiAlN涂层为以TiN0.9和CrN为主要组织取向的FCC结构，N2水平和衬底负偏压对涂层的力学特性和粘附强度有显著的影响。经过优化参数，在衬底偏压−55V和中N2水平条件下，CrTiAlN涂层的结合强度为10 N，显微硬度达到29.87 GPa。
关键字: CrTiAlN涂层；力学性能；结构特性；摩擦因数
CrTiAlN coatings on Al alloy deposited by sputtering
（1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
2. School of Metallurgical and Materials Engineering,
Chongqing University of Science and Technology, Chongqing 400050, China;3. Teer Coatings Ltd., West Stone House, Berry Hill Industrial Estate, Droitwich, Worcestershire WR9 9AS, UK
）
Abstract:A series of CrTiAlN multi-layer coatings on LY12 Al alloy substrates were prepared using unbalanced reactive magnetron sputtering system. The structural, mechanical and tribological properties of coatings were studied by X-ray diffractometry, microhardness tester and multi-functional ball-on-disc tester. The results show that the CrTiAlN coatings belong to FCC structure consisting of TiN0.9 and CrN, and the N2 level and negative bias voltage have a significant effect on CrTiAlN multi-layer coatings. The adhesion strength of optimized CrTiAlN coatings is 10 N at −55 V and medium N2 level, and its microhardness value is about 29.87 GPa.
Key words: CrTiAlN coatings; mechanical property; structural property; friction coefficient
