Wear behavior and corrosion properties of Fe-based thin film metallic glasses

被引:74
作者
Li, Zhi [1 ]
Zhang, Cheng [1 ]
Liu, Lin [1 ]
机构
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Mould Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China
关键词
Magnetron sputtering; Fe-based thin film metallic glasses; Adhesion; Wear; Corrosion; MECHANICAL-PROPERTIES; CURRENT TRANSIENTS; AMORPHOUS-ALLOYS; STAINLESS-STEEL; RESISTANCE; CU; COATINGS; ADHESION; ELEMENT; TA;
D O I
10.1016/j.jallcom.2015.07.256
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Fe48Mo14Cr15Y2C15B6 (at%) thin film metallic glasses (TFMGs) with various thickness (125-745 nm) were deposited on glass and 304 stainless steel (SS) by using single-alloy target magnetron sputtering. X-ray diffraction and transmission electron microscopy verified the fully amorphous structure of the as-deposited films. Results of dry friction and wear tests against Si3N4 demonstrated that Fe-based TFMGs had lower friction coefficient and nearly three times higher wear resistance with respective to 304SS. The corrosion properties of the Fe-based TFMGs were evaluated in an artificial sweat solution by various electrochemical analytical techniques, including potentiodynamic, potentiostatic polarization and Mott-Schottky analysis. It was shown that the Fe-based TFMGs exhibited highly stable passivity and pitting resistance, which was significantly higher than that of uncoated 304SS. The good corrosion resistance of Fe-based TFMGs results from the lower defect density and higher thickness of the asformed passive film as compared to 304SS. The pitting of the Fe-based TFMGs follows three distinct stages, i.e., pitting initiation, metastable pitting and stable pitting, as well as substrate dissolution-induced film rupture due to the adsorption and penetration of chloride ions in the artificial sweat solution. These findings are expected to broaden the application of Fe-based TFMGs as a highly protective film for electronic device applications. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:127 / 135
页数:9
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