Tribological Properties of the Micro-arc Oxidation Scale of Al Coating on TC4 Titanium Alloy

Jun-tao FU, Lian YANG, Wei-jie LIU, Tong BU, En CHEN, Chang-jie FENG

Abstract


In this paper, an Al coating was deposited on the TC4 Titanium alloy by arc ion plating, and hence the Al coating was micro-arc oxidized (MAO) in the solution of Na2SiO3 + (NaPO3)6 for 30min. The pin-on-disc tribological properties of the scale at room temperature and 400 oC were tested. For comparison, the tribological properties of the TC4 Titanium alloy and its MAO scale for 30 min were also conducted in above conditions. The results show that MAO treated the TC4 sample, especially for the Al coating on the TC4 substrate after MAO treatment, had superior wear resistance both at room temperature and 400oC. The wear mechanism of the scale was discussed.

Keywords


Al coating, Micro-arc oxidation, Tribological properties, TC4 alloy.


DOI
10.12783/dtmse/mmme2016/10076

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