摘要
采用IC10作为基体制备双层结构热障涂层,并对有、无涂层的试样进行了氧化循环试验.采用洛氏硬度计和努氏硬度计研究其界面结合力.结果表明,随着热循环时间的增加,有涂层和没有涂层的试样均有明显的增重,对于IC10高温合金,在1373K进行热循环,经过600 h后,其氧化增重大约为0.9 mg/cm2,而有粘结层的试样,其氧化增重大约为0.46 mg/cm2;有TBCs的试样,其氧化增重大约为0.42 mg/cm2.以IC10为基体的双层结构热障涂层在1373K下的热循环寿命为810 h,基体中的元素Mo、W、Ha和Ta向粘结层中少量的扩散.采用两种硬度压痕法对界面结合强度进行检测,结果表明,以IC10为基体的双层结构热障涂层的界面结合强度较高,但结合力随热循环时间的延长而下降.
In this study, superalloy IC10 was used as substrate for two-layered structured thermal barrier coatings （TBCs）. However, superalloy IC10 is a new kind of Ni3Al based alloy, with a rather complex composition. Rockwell hardness tester and knoop hardness tester were employed to evaluate the extent of adhesion between bond coat and top coat. The results showed that the lifetime was 810hs at 1373K for the TBCs on superalloy IC10 and a small amount of Mo、W、Ha and Ta from the substrate diffused into the bond coat during thermal cycling.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2006年第5期329-333,共5页
Corrosion Science and Protection Technology
关键词
电子束物理气相沉积(EB-PVD)
热障涂层
IC10合金
粘结层
热循环
electron beam physical vapor deposition （EB - PVD）
thermal barrier coatings （TBCs）
Ni3Al based alloy IC10
bond coat
thermal cycle
