Fabrication and Wear Resistance of TiO2/Al2O3 Coatings by Micro-arc Oxidation

被引：6

作者：

Shen Yizhou ^{[1
]}

Tao Haijun ^{[1
]}

Lin Yuebin ^{[1
,2
]}

Zeng Xiaofei ^{[1
]}

Wang Tao ^{[1
]}

Tao Jie ^{[1
]}

Pan Lei ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Nanjing 211100, Jiangsu, Peoples R China

[2] Jiangsu Prov Key Lab Intervent Med Devices, Huaian 223003, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Ti-6Al-4V; oxidation; TiO2/Al2O3; wear; CORROSION-RESISTANCE; CERAMIC COATINGS; MAGNESIUM ALLOYS; MICROSTRUCTURE; GROWTH; NANOPOWDERS; SUBSTRATE; TITANIUM;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TiO2/Al2O3 composite coatings were prepared on the surface of Ti-6Al-4V alloy by micro-arc oxidation in the Na2SiO3-(NaPO3)6-NaAlO2 solution. The growth process reveals that O2- reacts rapidly with Ti4+ (from substrate) along the reaction channels to form TiO2, and because of the addition of AlO2-, Al2O3 and Al2TiO5 are simultaneously formed. Al2TiO5 is immediately decomposed into rutile TiO2 and alpha-Al2O3 owing to the high thermal energy caused by discharge. Finally the prepared composite phase coatings are mainly composed of anatase TiO2, rutile TiO2 and alpha-Al2O3 via XRD analysis. Furthermore, the microhardness HV increases and maintains at about 11 000 MPa, and the wear resistance of the TiO2/Al2O3 composite coatings is enhanced by about 9.5 times than higher that of Ti-6Al-4V alloy owing to the existence of ceramic layer.

引用

页码：23 / 27

页数：5

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