摘要:
采用物理气相沉积技术,在TC4合金表面成功制备出CrN和DLC耐磨涂层。用扫描电镜和光学显微镜分析了耐磨涂层的表面/截面形貌和涂层厚度,VHM-I04显微硬度计测试了涂层的硬度,WS-1型划痕试验机研究了涂层的结合强度,IPC-208B原子力显微镜观察了DLC涂层的表面粗糙度,并采用TE66微磨损试验机系统考核了两种涂层的摩擦学性能。结果表明:CrN涂层厚度为5.12μm,硬度HV 1 267,结合力为22.95 N;DLC涂层由致密分布的纳米颗粒组成,厚度2.30μm,硬度HV 2 176,结合力24.85 N,表面粗糙度仅为4.86 nm;与裸TC4合金和CrN涂层相比,DLC涂层的摩擦系数较小,只有0.073,具有较好的减摩和抗磨性。
Abstract:
CrN and DLC coatings were deposited on TC4 titanium alloy by physical vapor deposition (PVD). Surface and section morphology, coating thickness, hardness were characterized by SEM, optical microscope, VHM-I04 microhardness tester.Bonding strength, surface roughness of DLC coating and the tribological properties were also investigated in this article.Resultsindicated that the thickness of CrN coating was 5.12 μm, the microhardness was HV 1 267, the bonding force between the TC4 substrate and CrN coating was about 22.95 N. DLC coating was composed of nanoparticles, the thickness was 2.30 μm, the microhardness was HV 2 176, the film substrate interfacial bonding force was 24.85 N, the surface roughness of DLC coating was 4.86 nm. Compared with naked TC4 alloy and CrN coating, the friction coefficient of DLC coating was only 0.073.
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