等离子喷涂常规和纳米ZrO_2-7%Y_2O_3热障涂层隔热性能  

Thermal Insulation Capability of Plasma-sprayed Conventional and Nano-structured ZrO_2-7%Y_2O_3 Thermal Barrier Coating

作　　者：王东生[1,2] 田宗军[2] 杨斌[1] 黄因慧[2] 

机构地区：[1]铜陵学院机械工程系,安徽铜陵244000 [2]南京航空航天大学机电学院,江苏南京210016

出　　处：《热加工工艺》2012年第14期141-144,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(21171131,51105204);安徽省自然科学基金资助项目(1208085QE84);安徽省高等学校省级优秀青年人才重点基金项目(2012SQRL190ZD);安徽省高等学校省级自然科学研究项目(KJ2011B185)

摘　　要：采用等离子喷涂工艺在TiAl合金表面制备常规和纳米ZrO2-7%Y2O3(质量分数)热障涂层,分析了两种涂层的组织结构,并对其隔热性能进行了比较。结果表明,等离子喷涂常规热障涂层呈典型的层状堆积特征,而纳米涂层为特殊的两相结构。相对于常规涂层,纳米涂层有较好的隔热性能;在1100℃时,等离子喷涂常规及纳米涂层的隔热温度分别为83、127℃。Conventional and nano-structured ZrO2-7%Y2O3 （mass fraction） thermal barrier coatings （TBCs） were deposite d on TiAl based alloy substrate by the plasma spraying technique. The microstructure and thermal insulation capability of the two types of coatings were comparatively researched. The results show that the tradition coating has a typical laminated structure. However, the nano-structured coating exhibits a bimodal microstructure consisting of fully melted regions and partially melted regions. The nano-structured coating has better thermal barrier effect than the conventional coating. The temperature drops of conventional and nano-structured coatings measured at 1100℃ are 83 ℃ and 127℃, respectively.

关 键 词：等离子喷涂 热障涂层 纳米涂层 隔热性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]