Hardness enhancement by compositionally modulated structure of Ti/TiN multilayer films
Hardness enhancement by compositionally modulated structure of Ti/TiN multilayer films
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DOI:
10.1116/1.581273
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发表时间:
1998-10
期刊:
影响因子:
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通讯作者:
E. Kusano;Masaru Kitagawa;H. Nanto;A. Kinbara
中科院分区:
文献类型:
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作者:
E. Kusano;Masaru Kitagawa;H. Nanto;A. Kinbara
In this article results of an investigation into effects of multilayer structures of compositionally modulated Ti/TiN films on their hardness is presented. Compositionally modulated Ti/TiN multilayer films were deposited onto borosilicate glass substrates by a reactive gas flow rate modulation magnetron sputtering method using a combination of a Ti metal target and an Ar–N2 mixture discharge gas. In this method, a N2 gas flow rate was changed by a computer-controlled mass flow controller to produce films with a varying composition distribution. The film hardness was measured by nanoindentation. The film composition depth profiles were estimated by Auger electron spectroscopy and x-ray photoelectron spectroscopy. A TiN single layer film was also deposited to compare its hardness with those of the Ti/TiN multilayer films. Modulation periods examined in this study were 10, 15, 20, and 40 nm. It was found that the film with a modulation period of 20 nm showed a maximum hardness of 29 GPa and that the films wi...