Mo-Ti-Ru三元系相平衡的实验研究

Experimental Investigation of Phase Equilibria in the Mo-Ru-Ti Ternary System

摘要:

本研究利用电子探针成分分析和X射线衍射分析等技术建立Mo-Ti-Ru三元系的1100°C和1300°C等温截面相图,实验结果表明：(1)在1100℃等温截面相图中存在三个三相区,而1300℃等温截面相图中存在两个三相区；(2)在1100℃等温截面中,由于Ti的加入,σ-Mo₅Ru₃相被稳定化并形成一个小单相区；(3)在1100℃和1300℃等温截面相图中,(βTi, Mo)相均从富Mo侧一直延伸至富Ti侧,并且具有较大的固溶度。Mo-Ti-Ru三元系相平衡的测定为Ti基合金热力学数据库的建立提供基础理论信息。

Abstract:

In this study, the isothermal sections of the Mo-Ru-Ti ternary system at 1100 and 1300 °C have been established using electron probe microanalysis and X-ray diffraction techniques. The results indicated that: (1) There were three three-phase regions at 1100 °C isothermal section and two three-phase regions at 1300 °C isothermal section; (2) the σ-Mo₅Ru₃ phase was stabilized to 1100 °C and formed a small single-phase region with the addition of Ti. (3) the (βTi, Mo) phase extended from Mo-rich side to Ti-rich side and dissolved a lot of Ru at 1100 and 1300 °C. The phase relationship of Mo-Ru-Ti system will provide the basic experimental data for the thermodynamic database of titanium alloys.