摘要
尝试了通过微弧氧化陶瓷化处理来提高ＴｉＡｌ 合金的抗高温氧化性能。结果表明， 通过微弧氧化处理能在ＴｉＡｌ 合金表面形成具有不同成分的陶瓷层， 但难以形成单一的Ａｌ２Ｏ３ 陶瓷层。在８５０ ℃的氧化实验表明， 不同成分的陶瓷层对ＴｉＡｌ 的抗氧化性能有不同的影响， 有些陶瓷层在氧化过程中剥落， 对ＴｉＡｌ 的抗氧化性能无明显改善； 另有一些陶瓷层与基体粘附性好， 在氧化过程不剥落，能在一定程度上提高ＴｉＡｌ 的抗氧化性能， 但氧仍能通过陶瓷层向内扩散， 在陶瓷层底下形成以Ａｌ２Ｏ３为主的ＴｉＯ２ 和Ａｌ２Ｏ３
The surface ceramics treatment has been tried on TiAl alloy by means of Micro Arc Oxidation (MAO) and their effect on oxidation resistance of TiAl alloy has been investigated. The results showed that ceramic coatings with different compositions can be obtained by different process. However, it seems very different to achieve a coating with only Al 2O 3. The oxidation test at 850 ℃ in air indicated that some ceramic coatings have very good adherence to the substrate, so they can effectively reduce the oxidation rate of TiAl, and in this situation, Al 2O 3 and TiO 2 mixture formed between the ceramic coatings and TiAl alloy may be due to the inward diffusion of oxygen through ceramic coatings.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1999年第A01期63-68,共6页
The Chinese Journal of Nonferrous Metals
基金
国家"八六三"计划资助项目7
国家杰出青年基金
