王甜甜,田晓东,李梅,朱施荣

• 1:长安大学材料学院

摘要(Abstract)：

采用16Si-x Al-4NH4F-Bal.Al_2O_3(x=1,2,3,4,%,质量分数)渗剂经1200℃扩散共渗5 h在Mo表面制备了不同Al含量的Mo(Si,Al)_2涂层,分析了渗剂中Al含量对涂层组织及其氧化膜结构的影响。结果表明,不同渗剂所形成涂层均具有多层结构,涂层的外层均由Mo(Si,Al)_2相组成;渗剂Al含量为1和2%时,涂层中间层均为Mo_5(Si,Al)_3相,内层则分别为固溶有少量Al的Mo或Mo_3(Al,Si)相;渗剂Al含量为3和4%时,涂层中间层均由Mo5(Si,Al)_3和Mo_3Al_8相组成,内层则均为Mo_3(Al,Si)相。对含Al为1和4%的渗剂所制备的涂层在1250℃下氧化50 h,前者氧化膜厚度约为3μm,主要由SiO_2组成;后者氧化膜厚度约为10μm,上部由Al_2O_3和SiO_2的混合物组成,下部为Al_2O_3。

关键词(KeyWords)： Mo(Si,Al)2涂层;组织;氧化;氧化膜结构

Abstract:

Keywords:

基金项目(Foundation): 西安市科技计划项目(No.CXY1512(8));; 长安大学中央高校基本科研业务费资助项目(No.310831161012)

作者(Author): 王甜甜,田晓东,李梅,朱施荣

DOI: 10.13289/j.issn.1009-6264.2016.12.025

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