二硅化钼喷涂粉末的制备及其涂层组织结构

doi:10.3724/SP.J.1077.2011.00203

无机材料学报 ›› 2011, Vol. 26 ›› Issue (2): 203-208.DOI: 10.3724/SP.J.1077.2011.00203

二硅化钼喷涂粉末的制备及其涂层组织结构

颜建辉¹, 唐思文¹, 张厚安²

1. 湖南科技大学新材料制备及应用技术研究所, 湘潭411201; 2.厦门理工学院机械工程系, 厦门361024

收稿日期:2010-04-27 修回日期:2010-06-01 出版日期:2011-02-20 网络出版日期:2011-01-21
作者简介:颜建辉(1973-), 男, 博士, 副教授. E-mail: yanjianhui88@163.com
基金资助:
国防基础研究项目(A3720060115);湖南科技大学博士启动基金(E51060)

Preparation of Spraying Powders and Microstructureof MolybdenumDisilicide Coating

YAN Jian-Hui¹, TANG Si-Wen¹, ZHANGHou-An²

1. Advanced Materials Synthesis and ApplicationTechnology Laboratory, Hunan University of Science and Technology, Xiangtan 411201, China; 2. Department ofMechanical Engineering, Xiamen University of Technology, Xiamen 361024, China

Received:2010-04-27 Revised:2010-06-01 Published:2011-02-20 Online:2011-01-21
Supported by:
National Defense Basic Research of China ( A3720060115 ) ; Foundation of Hunan University of science and Technology ( E51060 )

摘要/Abstract

摘要： 以粒度为1~2μm的MoSi₂粉末为原料,采用喷雾干燥和真空烧结制备了喷涂用MoSi₂团聚粉末. 分别用平均粒度为9.68μm的MoSi₂粉末和团聚造粒MoSi₂粉末(38~72μm)为喂料, 大气等离子喷涂制备了二硅化钼涂层,分析了涂层的微观组织结构. 研究结果表明,喷雾干燥造粒后的近球形粉末在1300℃真空烧结1h后,粉末流动性和松装密度分别为17.1s/50g和2.16g/cm³,比烧结前分别增加了57.0%和46.0%.平均粒度为9.68μm 的MoSi₂粉末制备的涂层主要是由Mo和Mo₅Si₃等富钼相组成. 团聚粉末制备的涂层主要由MoSi₂相组成,涂层较致密, 内部出现了类似“网状”的组织结构.

关键词: 二硅化钼, 喷雾干燥, 大气等离子喷涂, 涂层

Abstract: With the size of 1-2μm MoSi₂powder as raw material, MoSi₂ powderideal for air plasma spraying was prepared by spray drying and vacuumsintering. By using MoSi₂ powders (9.68μm ) and agglomeration powders (38-72μm) as the spray feedstock, MoSi₂ coatings weresuccessfully prepared using air plasma spraying. The phase composition and microstructure of the coatingwere studied.The results show that the mobility and loosedensity of theagglomeration powders sintered at 1300℃ for 1h are 17.1s/50g and 2.1g/cm³, respectively. Compared with the unsintered powders, the mobility and loose density of the sintered agglomeration powders increaseby 57.0% and 46%, respectively. XRD patterns shows the main phasesare Mo and Mo₅Si₃ phases in the coating prepared by thepowders with the size of 9.68 μm.In case of spraying withagglomeration powders, the main phase of the dense coating is MoSi₂. The “mesh”microstructure of molybdenum-rich phase is produced in the coatingprepared by the agglomeration powders.

Key words: molybdenum disilicide, spraying drying, air plasma spray, coating

中图分类号:

TB35

颜建辉, 唐思文, 张厚安. 二硅化钼喷涂粉末的制备及其涂层组织结构[J]. 无机材料学报, 2011, 26(2): 203-208.

YAN Jian-Hui, TANG Si-Wen, ZHANGHou-An. Preparation of Spraying Powders and Microstructureof MolybdenumDisilicide Coating[J]. Journal of Inorganic Materials, 2011, 26(2): 203-208.

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二硅化钼喷涂粉末的制备及其涂层组织结构

Preparation of Spraying Powders and Microstructureof MolybdenumDisilicide Coating

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