氧化时间对7A09超高强铝合金微弧氧化陶瓷膜的影响

Effects of Oxidation Time on Micro-arc Oxidation Ceramic Coatings of Super-high-strength Aluminum Alloy 7A09

采用NaAlO2-NaOH体系,对7A09超高强铝合金进行微弧氧化,研究了微弧氧化时间对陶瓷层厚度、显微硬度、表面及截面形貌、相组成的影响。结果表明:在其它参数一定的条件下,陶瓷层的厚度和硬度均随氧化时间的延长而不断增长,微弧氧化时间为45 min时,陶瓷层的显微硬度达到最高值1070HV0.1;陶瓷层主要由γ-Al2O3组成。

In sodium aluminate and sodium hydroxide system, the micro arc oxidation was used to 7A09 super-high strength aluminum alloy. The influence of oxidation time on ceramic layer thickness, micro hardness, surface and cross-section morphology and phase composition was studied. The results show that, in the condition of the same other parameters constant, with the micro arc oxidation time being 45 minutes, the highest micro hardness of Ceramic layer is 1070HV0.1, and the ceramic layer mainly consists of γ-Al2O3.