氧化时间对ZL205A铝合金微弧氧化膜层的影响

Effect of oxidation time on micro-arc oxidation coating of ZL205A aluminum alloy

摘要:

在硅酸钠体系溶液中,研究了不同氧化时间对ZL205A铝合金表面微弧氧化层表面形貌、厚度、元素分布及相组成的影响。结果表明,随氧化时间的增加,氧化膜表面微孔数量减少、孔径增大,膜层厚度不断增大；膜层中的Al、Si元素略有变化,O、P元素变化并不明显；氧化膜主要由α- Al₂O₃和Mullite(Al₆Si₂O₁₃)组成,随着氧化时间的增加,膜层中的α- Al₂O₃和Mullite相含量不断提高,Mullite相主要由阳极反应中生成的SiO₂及Al₂O₃共同作用而产生。

Abstract:

The influences of different oxidation time on surface morphology, thickness, elemental distribution and phase composition of micro-arc oxidation coatings on ZL205A was studied. The results show that with the increase of oxidation time, the number of micro-pores decreases while the size of micro-pores,the thickness increase. The content of Al, Si has little changes, O, P element did not change significantly. The MAO coating are mainly composed of α- Al₂O₃ and Mullite(Al₆Si₂O₁₃), with increasing oxidation time, the content of α- Al₂O₃ and Mullite increased,the Mullite phase mainly generated by the anode reaction product of SiO₂ and Al₂O₃.