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Preparation of Structure-Modulated Superhard Ti/TiN Nano-Multilayers and Size Effect |
Bobo YANG,Hui SUN( ),Tianlin YANG( ),Xiaolong ZHENG,Tao XU,Fangzheng LI,Shumei SONG |
School of Space Science and Physics, Shandong University Weihai, Weihai 264209, China |
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Cite this article:
Bobo YANG,Hui SUN,Tianlin YANG,Xiaolong ZHENG,Tao XU,Fangzheng LI,Shumei SONG. Preparation of Structure-Modulated Superhard Ti/TiN Nano-Multilayers and Size Effect. Chinese Journal of Materials Research, 2019, 33(2): 138-144.
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Abstract Multilayered films Ti/TiN with 5~40 nm modulation period were prepared on a high-speed steel substrate by multi-arc ion plating technology. The microstructure and mechanical property of the films were characterized by means of scanning electron microscopy (SEM), X-ray energy dispersive spectrometer (EDS), X-ray diffraction (XRD), nanoindentation and scratch test. The effect of modulation period on the performance of multilayered films Ti/TiN was investigated. Results show that the multilayered films Ti/TiN are uniform and dense with lamellar structure but without obvious features of columnar structure. TiN film is preferentially grown along the (111) direction. The film hardness increases firstly and then decreases with the decrease of the modulation period. The maximum hardness of 42.9 GPa and the maximum H/E value werer obtained when the modulation period is 7.5 nm, which indicates that the film possesses good combination of wear resistance and toughness. In addition, the adhesion of the multilayered films Ti/TiN is generally higher than that of the single-layered TiN film. When the modulation period is 7.5 nm, multilayered films Ti/TiN present a relatively high adhesion of (58±0.9) N.
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Received: 23 May 2018
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Fund: Shandong Provincial Natural Science Foundation(ZR2018QEM002);Young Scholars Program of Shandong University (Weihai) |
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