Surface modification of Ti-45Al-8.5 Nb alloys by microarc oxidation to improve high-temperature oxidation resistance

被引：2
|
作者：
Fang Cheng [1 ]
Shasha Li [1 ]
Wanyuan Gui [1 ]
Junpin Lin [1 ]
机构：
[1] State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing
来源：
Progress in Natural Science:Materials International | 2018年 / 28卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Cathode electrolytic plasma; Microarc oxidation; High temperature oxidation resistance; High Nb-Ti Al alloys; Coating;
D O I：
暂无
中图分类号：
TG174.4 [金属表面防护技术];
学科分类号：
080503 ;
摘要：
Microarc oxidation（MAO）electrolysis plasma deposition was used to prepare Al;O;coatings on Ti-45Al-8.5 Nb alloys to improve high temperature oxidation resistance.The surface and cross-section morphologies before and after high-temperature oxidation,the chemical composition,and the phase identification of the coatings were investigated by scanning electron microscopy（SEM）,electron probe microanalyses（EPMA）,and X-ray diffraction（XRD）.The results show that Al;O;coatings with a thickness of approximately 8μm can be obtained on the Ti-45Al-8.5 Nb alloys by MAO for 600 s.The samples with the Al;O;coatings exhibited better high-temperature oxidation resistance.A minimal weight gain of only 0.396 g/m;after 100 h oxidation at 900°C was observed for the coatings formed with a deposition voltage of 400 V and using a duty cycle of 3%.The deposition mechanism of the Al;O;coatings and the effect of the MAO parameters are also described.
引用
收藏
页码：386 / 390
页数：5
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