Ti6242S合金中硅化物出现的条件

Conditiions for Producing Silicide in a Ti6242S Alloy

摘要:

分析了在含硅的钛合金中硅化物存在的条件；并用ＥＭ４００透射电镜对几种采用不同热处理的Ｔｉ６２４２Ｓ合金试样进行了分析，结果表明：在本实验条件下，硅化物的出现是有条件的，形核是非均匀的；其结构是六方，为（ＴｉＺｒ）５Ｓｉ３型，共点阵参数ａ＝０．７６７ｎｍ，ｃ＝０．５８５ｎｍ，ｃ／ａ＝０．７６３；该硅化物和ａ相存在位向关系。

Abstract:

The conditions for producing silicide in a si-containing titanium alloy have been studied. The microstructure of several heattreated specimens have been analyzed using EM400 TEM. The results show that the silicide produced under some conditions, and it'snucleation is heterogeneous. The silicide has hexagonal structure with the fo1lowing lattice parameters: a = 0. 767 nm, c = 0. 585 nm,c/a=0. 763. The silicide has a orientation relationship with a phase.