铌表面固体粉末包埋渗硅研究

无机材料学报, 2005, 20(3): 764-768.

铌表面固体粉末包埋渗硅研究

李明 , 宋力昕 , 乐军 , 宋学平 , 郭占成

2. 2. 中国科学院过程工程研究所, 北京 100080

1.1. Research &

Development Center for Special Inorganic Materials

Shanghai Institute of Ceramics

Chinese Academy of Sciences

Shanghai 200050

China

2. 2.Institute of Process Engineering

Beijing 100080

China

关键词：渗硅 , coating , niobium , niobium disilicide

Microstructure and Mechanism of Pack Siliconizing on Niobium

LI Ming , SONG Li-Xin , LE Jun , SONG Xue-Ping , GUO Zhan-Cheng

Keywords： siliconizing , 涂层 , 铌 , 二硅化铌

采用固体粉末包埋渗硅工艺在铌表面制备了二硅化铌涂层,研究了渗硅过程中Si沉积的反应机理和二硅化铌涂层的结构.结果表明:涂层由单相的二硅化铌组成;Si的输运和沉积主要依靠硅的低氟化物SiF₂完成.

NbSi2 coating was formed on niobium by halide-activated pack cementation process. The microstructure of the as-formed coating and the possible reactions of Si deposition were investigated. The results indicate that the as-formed coating consists of single phase of NbSi₂- SiF₂ is responsible for the transportation and deposition of Si in the pack.

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