表面技术2017，Vol.46Issue(5)：6-11,6.DOI:10.16490/j.cnki.issn.1001-3660.2017.05.002
TC4在锆盐体系下微弧氧化膜层的生长特性研究
Growth Characteristic of Micro-arc Oxide Coating on TC4 in Zirconium Salt System
摘要
Abstract
The work aims to explore influence law of coating growth on its micro-hardness and determine the best time of preparing high-hardness micro-arc oxide coating by establishing dynamic relationship between oxidation time and coating growth of ZrO2/TiO2 composite ceramic coating. Micro-arc oxidation was performed to TC4 for different time provided with zirconium salt system and optimized electrical parameters to analyze coating surface and cross-section morphology, elements distribution and phase composition, measure and analyze microhardness and porosity of the coating. The coating growth exhi-bited different dynamic characteristics and macroscopic appearance in the test oxidation time. There were two stages during the coating growth: the coating thickness increased linearly in the first stage, and then growth rate slowed down in the second stage. The surface porosity increased over time. The hardness was the highest when the oxidization has last for 15 min. And the mi-cro-hardness first increased and then decreased over time. The main factors influencing microhardness of MAO coating are phase composition and surface structure. The micro-hardness increases linearly as coating thickness exhibits linear growth; and the micro-hardness decreases as coating thickness exhibits slow growth.关键词
微弧氧化/钛合金/显微硬度/锆盐体系/ZrO2/TiO2/孔隙率Key words
micro-arc oxidation/titanium alloy/micro-hardness/zirconium salt system/ZrO2/TiO2/porosity分类
矿业与冶金引用本文复制引用
周勤勤,郝建民,陈永楠,陈宏,丁业立..TC4在锆盐体系下微弧氧化膜层的生长特性研究[J].表面技术,2017,46(5):6-11,6.基金项目
国家自然科学基金(51301022) The National Natural Science Foundation of China (51301022) （51301022）
