Ni-Pt-Ta三元系1 423 K等温截面的测定

来源期刊：中南大学学报(自然科学版)2002年第3期

论文作者：王日初 柳春雷 金展鹏

文章页码：266 - 269

关键词：Ni-Pt-Ta三元系;扩散偶;扩散层;相平衡;等温截面

Key words：Ni-Pt-Ta ternary system; diffusion triple; diffusion layers; phase equilibria; isothermal section

摘    要：运用三元扩散偶技术测定了Ni-Pt-Ta三元系1 423 K的等温截面,用电子探针微区成分分析方法分析了Ni-Pt-Ta三元扩散偶的相区成分,并对其相关系进行了研究.测得Ni-Pt-Ta三元扩散偶中有6个二元化合物:Pt₃Ta, Pt₂Ta,Ni₃Ta, Ni₂Ta, NiTa和NiTa₂.Ni₃Ta与Pt₃Ta形成了一个有较小固溶度的线性化合物(Ni,Pt) ₃Ta,未发现三元中间化合物.实验发现Ni-Pt-Ta三元系1423K的等温截面有4个三相区,即:Pt₂Ta+(Ta)+NiTa₂ ;Pt₂Ta+NiTa₂+NiTa;Pt₂Ta+(Ni,Pt) ₃Ta+NiTa;(Ni,Pt) ₃Ta+NiTa+Ni₂Ta.

Abstract: The isothermal sections of the Ni-Pt-Ta ternary system at 1 423 K are determined by means of diffusion triple technique and the electron microprobe analysis. The results indicate that there form sixbinary intermetallics in the Ni-Pt-Ta system at 1423 K, which are Pt₃Ta, Pt₂Ta,Ni₃Ta, Ni₂Ta, NiTa and NiTa₂. Ni3Ta and Pt₃Ta form a line compound (Ni,Pt) ₃Ta, but no ternary compound is observed. There occur four three-phase fields of is othermal sections in Ni-Pt-Ta system at 1423 K, which are: Pt₂Ta+(Ta)+NiTa₂ ;Pt₂Ta+NiTa₂+NiTa;Pt₂Ta+(Ni,Pt) ₃Ta+NiTa;(Ni,Pt) ₃Ta+NiTa+Ni₂Ta.