Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1602587 | International Journal of Refractory Metals and Hard Materials | 2016 | 7 Pages |
Abstract
TiAlSiN coatings has been proposed and studied because of their desirable properties in hardness and coating-substrate adhesion. Further improvement of their performance can be achieved by better understanding the effect of the concentration of each element on the microstructure and mechanical properties of the coatings. In this paper, the TiAlSiN coatings with different Ti content were deposited by reactive DC magnetron sputtering method. The microstructure and mechanical properties of the coatings were analyzed by energy dispersive spectroscopy, X-ray diffraction, transmission electron microscope, scanning electron microscope, nano-indentor and Rockwell indentation tester. The results reveal that TiAlSiN coatings consisted of amorphous phase and crystalline phase. With a Ti content of 63Â at.%, as well as a Si content of 7Â at.%, a super-hard TiAlSiN coating with a nanoindentation hardness of 66Â GPa was achieved. What is more, in contrast to the well-described super-hard nanocomposite TiAlSiN coatings, another “nanocomposite” microstructure coating with a Ti content of 29Â at.% in which the amorphous phase is wrapped in a crystalline phase was identified, with a comparatively low hardness value of 20Â GPa. The highest adhesion strengths with a Rockwell indentation classes HF2 was achieved for a coating with a Ti content of 63 or 65Â at.%.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Quansheng Ma, Liuhe Li, Ye Xu, Xuan Ma, Yi Xu, Hongtao Liu,