Influence of electrical parameters on particle uptake during plasma electrolytic oxidation processing of AM50 Mg alloy

SURFACE & COATINGS TECHNOLOGY

卷:289

Article

Lu, Xiaopeng¹  Blawert, Carsten¹  Mohedano, Marta¹  Scharnagl, Nico¹  Zheludkevich, Mikhail L.¹  Kainer, Karl Ulrich¹ 

[1] Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Plank Str 1, D-21502 Geesthacht, Germany

关键词: Magnesium;    Coatings;    Plasma electrolytic oxidation;    SiO2 particle;    Electrical parameter;   

DOI  :  10.1016/j.surfcoat.2016.02.006

来源: Elsevier

【 摘 要 】

The influence of electrical parameters on microstructure and composition of coatings by plasma electrolytic oxidation (PEO) with particle addition was investigated. PEO coatings were produced on AM50 magnesium alloy from an alkaline phosphate based electrolyte (1 g/l KOH + 20 g/l Na3PO4) with 5 g/l SiO2 particle (1-5 mu m) addition. Besides the most common electrical parameters (voltage and current density), frequency and duty ratio have effect on the uptake of particles during PEO processing. Higher duty ratio and lower frequency allow to incorporate more particles into the PEO coating. The area of the melting pools, as indicated by the size and area of the open pores on the coating surface, can be considered as one important factor to determine the particle uptake during PEO processing. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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