期刊
CERAMICS INTERNATIONAL
卷 47, 期 2, 页码 2022-2033出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.09.034
关键词
CrAlN/TiSiN; Microstructure; Fracture; Wear resistance
资金
- Provincial Secretariat for Higher Education and Scientific Research of Vojvodina [142-451-2203/2019-01/02]
- Slovenian Research Agency (ARRS) [P2-0082]
The CrAlN/TiSiN nanolayer coating demonstrates superior tribological performance and lower wear rate compared to the nanocomposite TiSiN coating, despite requiring a lower indentation load for fracture. The nanolayer coating also exhibits better overall performance compared to the nanocomposite TiSiN coating.
With the goal to produce a hard and tough coating intended for tribological applications, CrAlN/TiSiN nanolayer coating was prepared by alternative deposition of CrAlN and TiSiN layers. In the first part of the article, a detailed study of phase composition, microstructure, and layer structure of CrAlN/TiSiN coating is presented. In the second part, its mechanical properties, fracture and tribological behavior are compared to the nanocomposite TiSiN coating. An industrial magnetron sputtering unit was used for coating deposition. X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy were used for compositional and microstructural analysis. Mechanical properties and fracture behavior were studied by instrumented indentation and focused ion beam techniques. Tribological properties were evaluated by ball-on-disk test in a linear reciprocal mode. A complex layer structure was found in the nanolayer coating. The TiSiN layers were epitaxially stabilized inside the coating which led to formation of dislocations at interfaces, to introduction of disturbances in the coating growth, and as a result, to development of fine-grained columnar microstructure. Indentation load required for the onset of fracture was twice lower for the nanolayer CrAlN/TiSiN, compared to the nanocomposite TiSiN coating. This agrees very well with their mechanical properties, with H-3/E-2 being twice higher for the TiSiN coating. However, the nanolayer coating experienced less severe damage, which had a strong impact on tribological behavior. A magnitude of order lower wear rate and four times lower steady state friction coefficient were found for the nanolayer coating.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据