Ti-6Al-4V合金表面陶瓷膜的制备.doc

文档介绍：
Ti-6Al-4V 合金表面陶瓷膜的制备#
于思荣,姚强,初宏超*
(中国石油大学(华东)机电工程学院,青岛 266580)
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摘要:采用微弧氧化技术,在 Ti-6Al-4V 合金表面制备出一层陶瓷膜。采用 X 射线衍射仪、
表面粗糙度测量仪、涡流测厚仪、共聚焦显微镜等对陶瓷膜层进行了表征。考察了电流密度、
占空比和氧化时间对微弧氧化陶瓷膜的厚度及粗糙度的影响。结果表明,Ti-6Al-4V 合金表
面微弧氧化陶瓷膜的主要相组成为 Ti、金红石型 TiO2 和锐钛矿型 TiO2。随微弧氧化电流密
度、占空比及氧化时间的增加,微弧氧化陶瓷膜的厚度和粗糙度均增大。占空比对粗糙度的
影响较复杂,当占空比较小时,随占空比的增大,粗糙度的增大幅度较小;当占空比大于
30%时,粗糙度增大速度较快。随氧化时间的增加,微弧氧化陶瓷膜的厚度和粗糙度均呈指
数增加。在 30min 前,随氧化时间增加,微弧氧化陶瓷膜的厚度和粗糙度增加较快;30min
后,随氧化时间增加,微弧氧化陶瓷膜的厚度和粗糙度增大幅度变小,趋于稳定。
关键词:钛合金;微弧氧化;表面形貌
中图分类号:
Preparation of the Ceramic Coating on Ti-6Al-4V Alloy
YU Sirong, YAO Qiang, CHU Hongchao
(College of Electromechanical Engineering, China University of Petroleum, Qingdao 266580)
Abstract: Micro-arc oxidation technology was applied for preparing a ceramic coating on
Ti-6Al-4V alloy surface. The ceramic coating was characterized by using X-ray diffraction,
surface roughness measuring instrument, eddy current thickness measuring instrument and
confocal microscopy. The effects of current density, duty cycle and oxidation time on the
thickness and roughness of MAO ceramic coating are examined. The results showed that the
phases of MAO ceramic coating on Ti-6Al-4V alloy surface mainly consist of Ti, rutile and
anatase. With the increase of current density, duty cycle and oxidation time, both thickness and
roughness of MAO ceramic coating increase