Microstructure and Phase Constituent of Microarc Oxidation Ceramic Coating on the Surface of ZAlSi12

L Kai; Liu Xiangdong; Zhang Yaping; Wu Di

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Microstructure and Phase Constituent of Microarc Oxidation Ceramic Coating on the Surface of ZAlSi12
Issue 5, Pages: 392-394(2008)
Published： 2008 ，
DOI：

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[1]吕凯,刘向东,张雅萍,乌迪.ZAlSi12表面微弧氧化陶瓷层微观形貌与相组成分析[J].特种铸造及有色合金,2008(05):392-394+327.

L Kai, Liu Xiangdong, Zhang Yaping, et al. Microstructure and Phase Constituent of Microarc Oxidation Ceramic Coating on the Surface of ZAlSi12. [J]. Special Casting & Nonferrous Alloys (5):392-394(2008)
[1]吕凯,刘向东,张雅萍,乌迪.ZAlSi12表面微弧氧化陶瓷层微观形貌与相组成分析[J].特种铸造及有色合金,2008(05):392-394+327. DOI：

L Kai, Liu Xiangdong, Zhang Yaping, et al. Microstructure and Phase Constituent of Microarc Oxidation Ceramic Coating on the Surface of ZAlSi12. [J]. Special Casting & Nonferrous Alloys (5):392-394(2008) DOI：

摘要

研究了电解液中不同的NaOH加入量对ZAlSi12微弧氧化陶瓷层厚度的影响规律。通过SEM观察分析微弧氧化膜的微观形貌

采用XRD分析陶瓷层的相组成。研究结果表明

NaOH质量浓度为2.0g/L时

膜层厚度达169μm。膜层表面有明显的放电通道

且陶瓷膜与基体呈锯齿状结合。氧化膜的主要相组成为α-Al2O3和γ-Al2O3。

Abstract

Effects of NaOH concentration in the electrolyte on the thickness of micro-arc oxidization coating on ZASi12 alloy were observed. The microstructure and phase constituent of the ceramic coating were analyzed by SEM （scanning electron microscope） and XRD（X-ray diffraction）. The results reveal that a good coating with thickness of 169 μm can be obtained in electrolyte with 2.0 g/L NaoH concentration. It is found that there exist obvious electric discharge channels in the coating with the coating and the substrate inserting into each other. The film is composed of α-Al2O3 phase and γ-Al2O3 phase.