东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (3): 352-355.DOI: -

• 材料与冶金 • 上一篇    下一篇

LC4表面纳米SiC和PTFE双颗粒复合阳极氧化膜的制备

陈岁元，王静，梁京，刘常升   

  1. (东北大学材料各向异性与织构教育部重点实验室，辽宁沈阳110819)
  • 收稿日期:2012-08-08 修回日期:2012-08-08 出版日期:2013-03-15 发布日期:2013-01-26
  • 通讯作者: 陈岁元
  • 作者简介:陈岁元(1964-)，男，甘肃天水人，东北大学教授，博士生导师；刘常升(1963-)，男，内蒙古奈曼旗人，东北大学教授，博士生导师.
  • 基金资助:
    辽宁省教育厅科学技术研究项目(LT2010031)；沈阳市科技工业攻关项目(F11-042-2-00)；中央高校基本科研业务费专项资金资助项目(N100702001).

Preparation of Composite Anode Oxide Film with NanoSiC and PTFE Double Particles on the Surface of LC4 Aluminum Alloy

CHEN Suiyuan， WANG Jing， LIANG Jing， LIU Changsheng   

  1. Key Laboratory for Anisotropy and Texture of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China.
  • Received:2012-08-08 Revised:2012-08-08 Online:2013-03-15 Published:2013-01-26
  • Contact: CHEN Suiyuan
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摘要： 以250g/L硫酸+15g/L草酸为基础电解液，通过添加2g/L表面改性的纳米SiC颗粒和15ml/LPTFE乳液，组成双颗粒复合阳极氧化电解液，利用脉冲电源在LC4铝合金表面制备双颗粒复合的阳极氧化膜.结果表明:在脉冲电源频率80Hz、占空比80%、电流密度3A/dm2、温度0℃、氧化时间40min等条件下，在LC4铝合金表面成功制备出厚度为20μm，硬度为4340MPa的双颗粒复合的Al2O3-SiC-PTFE阳极氧化膜；复合氧化膜结构中存在着大量的微米级的孔隙缺陷为复合沉积双颗粒提供了复合场所，形成了具有纳米SiC颗粒增强膜的硬度和PTFE颗粒增强膜的自润滑性能的双颗粒复合氧化膜.

关键词: LC4铝合金, 复合阳极氧化, 颗粒增强, 氧化膜结构, 硬度

Abstract: Using 250g/L H2SO4 and 15g/L H2C2O4 as the basic electrolyte， by adding 2g/L surface modified nanoSiC particles and 15ml/L PTFE emulsion， a kind of double particle composite anodizing electrolyte was composed. A composite anode oxide film with double particles was prepared on the surface of LC4 aluminum alloys using pulse power supply. The results showed that under the anodic oxidation processing condition such as the oxidation temperature of 0℃， the current density of 30Adm-2， the duty ratio of 80%， and the oxidation time of 40min， a double particle Al2O3SiCPTFE composite anodic oxide film with thickness of 20μm and the hardness 4340MPa was successfully prepared on the surface of the LC4 aluminum alloy. There were a lot of micron pore defects in the structure of the composite oxide film， which provided composite places for the composite deposition of the double particles. A double particle composite film that has nano SiC particles reinforced hardness and PTFE particle reinforced self lubricating properties was formed.

Key words: LC4 aluminum alloys, composite anodic oxidation, particle reinforced, oxide film structure, hardness

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