MULTILAYERS DIAMOND-LIKE CARBON FILM WITH GERMANIUM BUFFER LAYERS BY PULSED LASER DEPOSITION

Y. Cheng, Y. M. Lu (), Y. L. Guo, G. J. Huang, S. Y. Wang and F. T. Tian
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Y. Cheng: Opto-Electronics Facility of Wuhan Mechanical College, Wuhan 430075, P. R. China
Y. M. Lu: Opto-Electronics Facility of Wuhan Mechanical College, Wuhan 430075, P. R. China
Y. L. Guo: Opto-Electronics Facility of Wuhan Mechanical College, Wuhan 430075, P. R. China
G. J. Huang: Opto-Electronics Facility of Wuhan Mechanical College, Wuhan 430075, P. R. China
S. Y. Wang: Opto-Electronics Facility of Wuhan Mechanical College, Wuhan 430075, P. R. China
F. T. Tian: Opto-Electronics Facility of Wuhan Mechanical College, Wuhan 430075, P. R. China

Surface Review and Letters (SRL), 2017, vol. 24, issue 02, 1-6

Abstract: Multilayer diamond-like carbon film with germanium buffer layers, which was composed of several thick DLC layers and thin germanium island “layers” and named as Ge-DLC film, was prepared on the germanium substrate by ultraviolet laser. The Ge-DLC film had almost same surface roughness as the pure DLC film. Hardness of the Ge-DLC film was above 48.1GPa, which was almost the same as that of pure DLC film. Meanwhile, compared to the pure DLC film, the critical load of Ge-DLC film on the germanium substrate increased from 81.6mN to 143.8mN. Moreover, Ge-DLC film on germanium substrates had no change after fastness tests. The results showed that Ge-DLC film not only kept high hardness but also had higher critical load than that of pure DLC film. Therefore, it could be used as practical protective films.

Keywords: Multilayer diamond-like carbon film; pulsed laser deposition; adhesion strength; germanium buffer layers (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17500147

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