Effect of chromium transition layer on interface bonding strength between chromium nitride film and magnesium alloy substrate

doi:10.13251/j.issn.0254-6051.2021.01.027

Abstract

Abstract: To improve the bonding strength of magnetron sputtering chromium nitride film and magnesium alloy substrate,the chromium transition layer was deposited by different magnetron puttering processes between them,the influence of chromium transition layer on interface bonding strength between film and substrate and its mechanism were analyzed and discussed.The results show that adding chromium transition layer can increase the fracture critical load of film which characterizes the bonding strength of film and substrate,and the fracture critical load of film reaches the largest when the magnetron sputtering process of chromium transition layer is 100 W of sputtering power,30 V of negative bias voltage,25 ℃ of substrate temperature and 4 min of sputtering time,in which process the surface of chromium transition layer has the largest roughness and the smallest protuberance interval.The enhancing action of chromium transition layer on interface bonding is mainly reflected by improving the bonding between chromium nitride and magnesium alloy substrate,it is related to the larger contact area and the effective mechanical interlock between chromium transition layer and chromium nitride film,as well as the reduction of interface stress by chromium transition layer.

Key words: magnesium alloy, magnetron sputtering, chromium nitride film, chromium transition layer, bonding strength of film and substrate

CLC Number:

G174.444

Liu Ruixia, Guo Feng, Han Haipeng. Effect of chromium transition layer on interface bonding strength between chromium nitride film and magnesium alloy substrate[J]. Heat Treatment of Metals, 2021, 46(1): 143-148.

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