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研究Na2SiO3-NaOH体系电解液中Ce(NO3)3含量在0～0.20g/L范围内变化时对ZAlSi12合金表面微弧氧化陶瓷层组织和厚度的影响。采用SEM、XRD分析微弧氧化处理后陶瓷层的表面形貌和相组成。结果表明:随着Ce(NO3)3含量增加,陶瓷氧化层厚度逐渐增大,电解液中Ce(NO3)3加入量0.15g/L时可获得最大厚度为170μm的陶瓷层;电解液中加入Ce(NO3)3后,膜层仍主要由α-Al2O3和γ-Al2O3相组成,但α-Al2O3相的相对含量增加。
The effect of Ce (NO3) 3 content in the range of 0 ~ 0.20 g / L on the microstructure and thickness of the MAO coating on the surface of ZAlSi12 alloy was studied. The surface morphology and phase composition of the ceramic layer after microarc oxidation were analyzed by SEM and XRD. The results show that with the increase of Ce (NO3) 3 content, the thickness of the ceramic oxide layer increases gradually, and the ceramic layer with the maximum thickness of 170μm can be obtained by adding 0.15g / L Ce (NO3) 3 into the electrolyte. After Ce (NO3) 3, the film is mainly composed of α-Al2O3 and γ-Al2O3, but the relative content of α-Al2O3 increases.