论文部分内容阅读
采用在微弧氧化溶液中添加石墨烯的方法在镁合金表面制备一层微弧氧化层,用扫描电镜(SEM)、能谱仪(EDS)和四探针电阻测试仪对微弧氧化层的表面形貌、组成成分及导电性能进行分析测试。结果表明:添加石墨烯后微弧氧化层表面的孔洞数量明显增加,且均匀分布在整个表面,但孔洞的尺寸大大缩小;石墨烯在微弧氧化层孔洞中的含量明显高于致密部位;虽然镁合金微弧氧化层中局部的石墨烯原子数分数达到30%以上,但氧化层的导电性没有发生明显改变。
A micro-arc oxidation layer was prepared on the surface of magnesium alloy by adding graphene in the solution of micro-arc oxidation. The surface of micro-arc oxidation layer was characterized by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and four-probe resistance tester Surface morphology, composition and electrical conductivity of the analysis and testing. The results show that the number of pores on the surface of MAO coatings increases obviously and uniformly over the whole surface, but the size of the pores is greatly reduced. The content of graphene in the micro-arc oxide layer is obviously higher than that of the dense part. In the micro-arc oxidation layer of magnesium alloy, the local graphene atomic fraction reaches more than 30%, but the conductivity of the oxide layer does not change obviously.