Effects of Rare Earth （RE） on the Formation and Properties of Ceramic Coating on ZAlSi12Cu2Mg1 Prepared by Micro-arc Oxidation

Zhang Jing; Liu Xiangdong; Liu Xiaoli; Lü Kai; Wu Di

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Effects of Rare Earth （RE） on the Formation and Properties of Ceramic Coating on ZAlSi12Cu2Mg1 Prepared by Micro-arc Oxidation
Issue 12, Pages: 966-968(2007)
Published： 2007 ，
DOI：

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[1]张静,刘向东,刘晓丽,吕凯,乌迪.稀土对ZAlSi12Cu2Mg1陶瓷层性能的影响[J].特种铸造及有色合金,2007(12):966-968+901.

Zhang Jing, Liu Xiangdong, Liu Xiaoli, et al. Effects of Rare Earth （RE） on the Formation and Properties of Ceramic Coating on ZAlSi12Cu2Mg1 Prepared by Micro-arc Oxidation. [J]. Special Casting & Nonferrous Alloys (12):966-968(2007)
[1]张静,刘向东,刘晓丽,吕凯,乌迪.稀土对ZAlSi12Cu2Mg1陶瓷层性能的影响[J].特种铸造及有色合金,2007(12):966-968+901. DOI：

Zhang Jing, Liu Xiangdong, Liu Xiaoli, et al. Effects of Rare Earth （RE） on the Formation and Properties of Ceramic Coating on ZAlSi12Cu2Mg1 Prepared by Micro-arc Oxidation. [J]. Special Casting & Nonferrous Alloys (12):966-968(2007) DOI：

摘要

通过在Na2SiO3电解液体系中同时添加0.2g/L的Ce3+和不同含量的La3+以调整电解液组成

研究了Na2SiO3电解液中添加稀土离子对ZAlSi12Cu2Mg1合金微弧氧化陶瓷层相结构和力学性能的影响。结果表明

电解液中添加Ce3+和La3+

可以显著提高陶瓷层质量

其中添加0.2g/L的Ce3+和0.3g/L的La3+

所得陶瓷层主要由α-Al2O3、γ-Al2O3、Al2SiO5和非晶相组成

陶瓷层厚为157μm

硬度（HV）为947

经6000r磨损后

ZAlSi12Cu2Mg1合金基体的磨损量为102.2mg

而陶瓷层S1磨损量为19.7mg

仅为铝合金基体的19%。

Abstract

The properties of ceramic coating could be improved by adjusting the compositions in electrolyte during microarc oxidation.The effects of RE ion Ce3+ and La3+ addition on microstructure and mechanical properties of ceramic coating on ZAlSi12Cu2Mg1 prepared by micro-arc oxidation were investigated through adding 0.2 g/L Ce3+ and varied La3+ in electrolyte.The results show that the Ce3+ and La3+ addition can greatly improve the quality of the coating.The ceramic coating prepared by micro-arc oxidation in electrolyte with 0.2 g/L Ce3+ and 0.3 g/L La3+ addition is composed of α-Al2O3

γ-Al2O3

Al2SiO5 and amorphous phase

whose thickness and hardness are 157μm

HV 947

respectively.The weight loss of ZAlSi12Cu2Mg1 matrix alloy is 102.2 mg while the weight loss of ceramic coating is 19.7 mg

19% of that of matrix alloy

after 6 000 rads abrasion.