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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 的混合氧化物
Attempts have been made to improve the high temperature oxidation resistance of TiAl alloy by MAO treatment. The results show that ceramic coatings with different composition can be formed on the surface of TiAl alloy by MAO treatment, but it is difficult to form a single Al2O3 ceramic coating. Oxidation experiments at 850 ℃ showed that the ceramic coatings with different compositions had different effects on the oxidation resistance of TiAl. Some ceramic coatings peeled off during the oxidation process and did not improve the oxidation resistance of TiAl significantly. In addition, Good adhesion, no peeling during the oxidation process, can improve the oxidation resistance of TiAl to a certain extent, but the oxygen can still diffuse inward through the ceramic layer, forming a mixed oxidation of Al2O3 and Al2O3 mainly under the ceramic layer Things