涡轮叶片用渗Al涂层高温氧化行为  

High-temperature Oxidation Behavior of Aluminized Coatings on Turbine Blades

作　　者：王永贵[1] 邱尔妮 杨立发[1] 丁明惠 

机构地区：[1]中国船舶重工集团公司第七三研究所涡轮机设计室,黑龙江哈尔滨150036 [2]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001

出　　处：《热能动力工程》2007年第6期601-604,686,共4页Journal of Engineering for Thermal Energy and Power

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.

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 

分 类 号：TK474.8[动力工程及工程热物理—动力机械及工程]