(1. 哈爾濱工業(yè)大學 應用化學系， 哈爾濱 150001;
2. Department of Industrial Chemistry, Chiba Institute of Technology, Japan)
摘 要: 研究了水玻璃KOHNaAlO2體系對LY12鋁合金微等離子體氧化過程的影響， 考察了不同的NaAlO2濃度下，氧化過程電壓時間曲線的變化特點， 測定了膜層的硬度、 擊穿電壓。 運用XRD， SEM， EPMA研究了膜層的相組成、 形貌及元素分布， 發(fā)現(xiàn)膜層由莫來石相和γAl2O3相組成，具有疏松層和緊密層兩層結構， 鋁元素含量沿著從基體到膜層的方向逐漸減少， 而硅元素含量卻逐漸增加。
關鍵字: ［微等離子體氧化； 鋁合金； 陶瓷膜； 莫來石
（1. Harbin Institute of Technology, Harbin 150001, P.R.China;
2. Department of Industrial Chemistry, Chiba Institute of Technology, Japan）
Abstract:The effect of sodium silicateKOHNaAlO2 system on the microplasma oxidation process of LY12 aluminum alloy has been studied. The features of the voltagetime curve of oxidation process were studied under different concentration of NaAiO2. The hardness of the film layer and the breakdownvoltage were also measured. Finally by SEM and XRD and EPMA analysis, The characters of the composition, the distribution, and the content of the elements in the film were obtained. At the same time, it was found that the film is composed of mullite and γAl2O3， and there are two kinds of layer structure on ceramic film layer, which are surface porous zone and compact zone . The content of aluminum increases from the base to film, but the content of silicon decreases.
Key words: microplasma oxide； aluminum alloy； ceramic film；mullite
