摘要
采用料浆法在涡轮叶片材料K4104镍基高温合金表面制备渗Al涂层,利用静态高温氧化以及多种物理测试方法研究了渗Al涂层的防护性能。对试验过程中氧化动力学特征及氧化膜形貌的变化进行了深入的分析。试验结果表明:渗Al涂层改善了合金的抗氧化性能;长时间的高温氧化使渗Al涂层/基体间出现空洞,导致氧化膜剥落,涂层的抗氧化性能有一定程度减弱。
By adopting a slurry process an aluminized coating is formed on the high-temperature nickel-base alloy surface of blade material K4104.By making use of static-state high-temperature oxidation and various physical testing methods,studied was the protective performance of the aluminized coating.An in-depth analysis was performed of the oxidation dynamic characteristics and the morphological change of an oxide film during the test process.The test results show that the aluminized coating has improved the oxidation-resistance performance of the alloy.A long-duration high-temperature oxidation can lead to the emergence of cavities between the aluminized coating and basal body,resulting in the peeling-off of the oxide film and the weakening of the oxidation-resistance performance of the coating to a certain extent.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2007年第6期601-604,686,共4页
Journal of Engineering for Thermal Energy and Power
关键词
涡轮叶片
渗Al涂层
氧化动力学
氧化膜形貌
短路通道
turbine blade,aluminized coating,oxidation dynamics,oxide film morphology,short-circuit passage
