处理液浓度对铝合金微弧氧化陶瓷膜成膜速率和硬度的影响

处理液浓度对铝合金微弧氧化陶瓷膜成膜速率和硬度的影响

于凤荣^1,2, 吴汉华¹, 龙北玉¹, 王乃丹¹, 毕冬梅¹, 于松楠¹

(1. 吉林大学物理学院, 长春 130021; 2. 燕山大学材料与工程学院, 河北省秦皇岛 066004）

收稿日期:2005-08-24 修回日期:1900-01-01 出版日期:2005-11-26 发布日期:2005-11-26
通讯作者: 吴汉华

Effects of Treating Solution Concentration on Growth Rate and Microhardness of MAO Coatings on Aluminum Alloy

YU Feng-rong^1,2, WU Han-hua¹, LONG Bei-yu¹, WANG Nai-dan¹, BI Dong-mei¹, YU Song-nan¹

(1. College of Physics, Jilin University, Changchun 130021, China; 2. College of Materials Science & Engineering, Yanshan University, Qinhuangdao 066004, Hebei Province, China)

Received:2005-08-24 Revised:1900-01-01 Online:2005-11-26 Published:2005-11-26
Contact: WU Han-hua

摘要/Abstract

摘要： 分别在Na₂SiO₃, NaAlO₂和(NaPO₃)₆溶液体系中, 研究了处理液种类和浓度对LY12铝合金微弧氧化陶瓷膜微观结构、成膜速率和显微硬度的影响. 结果表明: 氧化陶瓷膜分表面疏松层和内部致密层, 处理液种类对陶瓷膜的微观结构影响较大, 而同种处理液浓度的变化对其影响不明显; 当处理液浓度小于8 g/L时, 陶瓷膜的成膜速率和显微硬度随处理液浓度的增加而逐渐增加; 当处理液浓度高于8 g/L时, 陶瓷膜的成膜速率和显微硬度随浓度的变化而出现较大的波动, 这种现象符合Albella杂质中心放电模型.

关键词: 微弧氧化, 微观结构, 陶瓷膜, 生长速率, 显微硬度

Abstract: The effects of treating solution concentration on the microstructure, growth rate, and microhardness of Al-alloy MAO coatings, which were prepared in individual Na₂SiO₃, NaAlO₂, and (NaPO₃)₆ solutions, were studied, respectively. The experimental results show that (1) the coating consists of the superficial porous layer and the interior compact layer, the coating microstructure is closely related to the treating solution category while the effect of the treating solution concentration on it is unobvious; and (2) the coating growth rate and microhardness increase gradually with the increased treating solution concentration when the concentration is less than 8 g/L, but both the growth rate and the microhardness are fluctuating with the increased solution concentration when the concentration is more than 8 g/L. This phenomenon accords with Albella’s discharge model of impurity center.

Key words: microarc oxidation, microstructure, coating, growth rate, microhardness

中图分类号:

TG174

于凤荣, 吴汉华, 龙北玉, 王乃丹, 毕冬梅, 于松楠. 处理液浓度对铝合金微弧氧化陶瓷膜成膜速率和硬度的影响[J]. J4, 2005, 43(06): 825-829.

YU Feng-rong, WU Han-hua, LONG Bei-yu, WANG Nai-dan, BI Dong-mei, YU Song-nan. Effects of Treating Solution Concentration on Growth Rate and Microhardness of MAO Coatings on Aluminum Alloy[J]. J4, 2005, 43(06): 825-829.

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