纳米氧化锆基热障烧蚀复合涂层的制备与研究  

Study on Nano-structure Zirconia-matrix Thermal Barrier and Ablative Composite Coating

作　　者：杨章富[1] 程旭东[1] 张子军[1] 邓飞飞[1] 高忠宝[1] 张覃轶[2] 章桥新[2] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070 [2]武汉理工大学材料学院,湖北武汉430070

出　　处：《表面技术》2007年第1期42-44,47,共4页Surface Technology

摘　　要：在纳米ZrO2中加入适量低熔点无机烧蚀材料S iO2和Cu,利用大气等离子喷(APS)技术,在TC4基体上制备出一种复合防热涂层。应用等离子火炬对涂层进行模拟烧蚀防热试验,运用X射线衍射(XRD)、扫描电镜(SEM)、电子探针(EPMA)等测试方法对粉末及涂层烧蚀前后的物相组成、显微结构和成分分布进行了观察和确定。研究结果表明,复合涂层表层烧蚀防热作用明显,内部仅出现液化现象,总体上涂层防热性能仍优于单一PYSZ涂层。涂层平均结合强度为47.7MPa。Nano-structure zirconia was doped with a certain amount of two kinds of inorganic ablative material, silica and copper. Then thermal protective composite coating was prepared on TC4-matrix by air plasma spraying. Ablative thermal protection test was simulated by plasma torch. Phase, microstructure and distribution of compositon were charactered by some test means such as XRD, SEM and EMPA. The results show that ablative thermal protection occurres in evidence on the surface of composite coating, but liquidation only appeares inside coating. As a whole, thermal protection capability of composite coating is superior to that of single PYSZ coating. Average bond strength of composite coating is 47.7Mpa.

关 键 词：大气等离子喷涂 热障烧蚀 防热性能 复合涂层 纳米材料 无机烧蚀材料 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TQ637[金属学及工艺—金属学]