钛表面阴极微弧电沉积制备氧化铝涂层

无机材料学报

钛表面阴极微弧电沉积制备氧化铝涂层

李新梅; 李银锁; 憨勇

西安交通大学金属材料强度国家重点实验室, 西安710049

收稿日期:2004-09-22 修回日期:2004-11-09 出版日期:2005-11-20 网络出版日期:2005-11-20

Preparation of Alumina Coatings on Titanium by Cathodic Micro-arc Electrodeposition

LI Xin-Mei; LI Yin-Suo; HAN Yong State

State Key Laboratory for Mechanical Behavior of Materials; Xi an Jiaotong University; Xi an 710049, China

Received:2004-09-22 Revised:2004-11-09 Published:2005-11-20 Online:2005-11-20

摘要/Abstract

摘要： 采用阴极微弧电沉积在钛表面生成了厚度达100μm的氧化铝涂层,研究了不同电压下涂层的结构和组成,分析了涂层的生长规律和形成过程.结果表明:阴极微弧电沉积过程包括火花前、微弧和局部弧光三个阶段,期间伴随有Al(NO₃)₃的离解、Al(OH)₃的沉积与高温烧结等反应,微弧区产生的高温高压是形成Al₂O₃涂层的关键.涂层主要由γ-Al₂O₃和α-Al₂O₃组成,随电压升高,α-Al₂O₃的含量逐渐增加,在400V时其含量达76%.

关键词: 阴极微弧电沉积, 钛, 氧化铝涂层

Abstract: An alumina coating with a thickness of 100μm on a titanium substrate was prepared by cathodic micro-arc electrodeposition. The microstructures and phase compositions
of the coating at different voltages were studied, and the growth mechanism of the coating was analyzed. The results show that the coating grows by
the following steps: the stage of no electric spark, micro-arc discharge and local arc light. In these courses Al(NO₃)₃ is dissociated and Al(OH)₃
is deposited and dehydrated. The high temperature and pressure produced in micro-arc area are keys to the formation of the alumina coating. The coating
is mainly composed of γ-Al₂O₃ and α-Al₂O₃. The content of α-Al₂O₃ is increased with increasing voltage, which
amounts to 7% at 400V.

Key words: cathodic micro-arc electrodeposition, titanium, alumina coating

中图分类号:

YQ174

李新梅,李银锁,憨勇. 钛表面阴极微弧电沉积制备氧化铝涂层[J]. 无机材料学报.

LI Xin-Mei,LI Yin-Suo,HAN Yong State. Preparation of Alumina Coatings on Titanium by Cathodic Micro-arc Electrodeposition[J]. Journal of Inorganic Materials.

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