钛合金表面富锆微弧氧化涂层的原位形成及摩擦学行为

doi:10.19976/j.cnki.43-1448/TF.2026021

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Abstract In conventional phosphate-, silicate-, or aluminate-based electrolytes, micro-arc oxidation coatings often suffer from insufficient wear resistance due to their intrinsic brittleness. To address this limitation, a stable electrolyte composed of K₂ZrF₆ and (NaPO₃)₆ was employed in this study to fabricate wear-resistant micro-arc oxidation coatings containing multiple Zr-bearing phases on TC4 titanium alloy. By varying the micro-arc oxidation treatment time, the plasma discharge behavior of TC4 titanium alloy during processing, as well as the evolution of coating microstructure, adhesion strength, and tribological performance, were systematically investigated. The results show that, as the micro-arc oxidation treatment time increases form 2 min to 60 min, the plasma discharge density on the TC4 surface gradually decreases, while the discharge intensity continuously increases, and the anodic current eventually approaches zero. When the micro-arc oxidation duration increases from 2 min to 60 min, the coating thickness rises from (14.35±3.11) μm to (65.72±6.68) μm, and critical load force in scratch testing improves from 11.00 N to 40.69 N. The coating is mainly composed of ZrP₂O₇, K₂Zr(PO₄)₂, ZrTiO₄, m-ZrO₂ and t-ZrO₂, forming a multiphase synergistically reinforced structure. After 48 h of dry sliding tests, a dense transfer film is formed on the coating surface, and the wear rate reduces to (5.44±0.27)×10^-6 mm³/(N·m), an approximately 99.0% decrease compared with the metallic substrate, demonstrating excellent wear resistance.

Key words： surface modification micro-arc oxidation oxide coating wear-resistant coating in situ formation zirconia long service life

Received: 10 February 2026 Published: 03 July 2026

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	WEI Jianlei
	LI Siyu
	ZHAO Qingjie
	HUANG Qianli

Cite this article:

WEI Jianlei,LI Siyu,ZHAO Qingjie, et al. In situ formation and tribological behavior of Zr-rich micro-arc oxidation coatings on titanium alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2026, 31(3): 310-320.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2026021 OR http://pmbjb.csu.edu.cn/EN/Y2026/V31/I3/310

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