铝合金在水玻璃-KOH-NaAlO2体系中的微等离子体氧化
来源期刊：中国有色金属学报2000年第4期
论文作者：姜兆华 辛世刚 王福平 吴晓宏 清水纪夫
文章页码：519 - 524
关键词：微等离子体氧化； 铝合金； 陶瓷膜； 莫来石
Key words：micro-plasma oxide； aluminum alloy； ceramic film；mullite
摘 要：研究了水玻璃KOH-NaAlO2体系对LY12铝合金微等离子体氧化过程的影响， 考察了不同的NaAlO2浓度下，氧化过程电压时间曲线的变化特点， 测定了膜层的硬度、 击穿电压。 运用XRD， SEM， EPMA研究了膜层的相组成、 形貌及元素分布， 发现膜层由莫来石相和γ-Al2O3相组成，具有疏松层和紧密层两层结构， 铝元素含量沿着从基体到膜层的方向逐渐减少， 而硅元素含量却逐渐增加。
Abstract: The effect of sodium silicateKOH-NaAlO2 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 breakdown-voltage 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 γ-Al2O3， 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.
