Thermodynamic Analysis of the Mo-Nb-B Ternary Phase Diagram

被引：9
|
作者：
Yamada, Kenta [1 ]
Ohtani, Hiroshi [1 ]
Hasebe, Mitsuhiro [1 ]
机构：
[1] Kyushu Inst Technol, Fac Engn, Dept Mat Sci, Kitakyushu, Fukuoka 8048550, Japan
来源：
JOURNAL OF THE JAPAN INSTITUTE OF METALS | 2009年 / 73卷 / 03期
关键词：
phase diagram; thermodynamic analysis; CALPHAD(calculation of phase diagrams); first-principles calculations; borides; MOLYBDENUM-BORON SYSTEM; TI;
D O I：
10.2320/jinstmet.73.180
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A thermodynamic analysis of the Mo-Nb-B ternary system has been carried out by estimating the unknown thermodynamic properties of binary and ternary borides using a first-principles method. The calculated values for the binary Mo-borides were in reasonable agreement with those found by experiment. However, the results showed that the formation enthalpy Of Mo2B5 had a positive value, and further experimental investigation of the crystal structure would be necessary. The formation enthalpies for the (Mo, Nb) B-2, (Mo, Nb) 3134, (Mo, Nb) B, (Mo, Nb)(2)B phases were also determined. The thermodynamic functions determined using these theoretical values, as well as the available experimental information on the phase fields, successfully revealed the phase equilibria in the Mo-Nb-B ternary system over the entire composition and temperature ranges.
引用
收藏
页码：180 / 188
页数：9
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