Surface Properties Contrast between Al Films and TiO2 Films Coated on Magnesium Alloys by Magnetron Sputtering

AUTOR(ES)

Zhu, Xiangrong, Zhu, Zhigang, Chen, Cheng, Bing, Naici, Xu, Zhongping, Li, Yang, Chen, Qiurong

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

20/02/2017

RESUMO

Al films and TiO2 films were separately coated on AZ31 magnesium alloy substrates by means of magnetron sputtering method. The surface properties of the samples were explored and compared. Scanning electron microscope (SEM) observed the compact structure characteristics of as-deposited Al films and TiO2 films. After heat treatment under 200ºC for half an hour the films kept the compact structure characteristics and there didn’t exist structural defects on the surface of the films. Nano-indentation measurement results display that the micro-hardness of as-deposited Al film and TiO2 film reaches about 1.90 Gpa and 1.51 Gpa, separately. Al film is a bit harder than TiO2 film. Finally, the corrosion experiments in simulated body fluid initially indicate the different corrosion properties for Al film and TiO2 film. Al film presents more effective anti-corrosion properties than TiO2 film.

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