Au基六元合金中的Ni固溶体研究

INVESTIGATION OF Ni SOLID SOLUTION IN Au-BASED HEXABASIC ALLOY

本文运用TEM.EDS等微观分析手段对Au基六元合金中的Ni固溶体进行了研究。结果表明,Ni固溶体为f,c,c结构(a_(Ni)=0.355nm).经调幅分解形成的置换式固溶体,成分为65at％Ni,10at％Au,18at％Fe,7at％cr,与基体有如下取向关系:(11-1)_(Ni)∥(11-1)_(Au),[011]_(Ni)∥[011]_(Au)。Ni固溶体在合金中起界面强化和弥散强化作用。

The Microstructure of Ni solid solution in Au-Ni-Fe-Cr-In-Zr alloy has been characterized by transmission electron microscopy (TEM) combined with quantitative X-ray microanalysis (EDS). The results show that Ni solid solution is a f. c. c structure substitutional solid solution produced by spinodal decomposition (a_(Ni) =0. 355nm). Its crystal oriention relationship with the matrix is (11-1)_(Ni),// (11-1)_(Au), [011]_(Ni) //[011]_(Au)·The compositions were determined by EDS analysis to be 65at%Ni-10at%Au-18at%Fe-7at% Cr. Ni solid solution plays a role of boundary and dispersion strengthening in this alloy.