《厦门大学学报（自然科学版）》

采用电子探针显微分析(EPMA)和X射线衍射(XRD)技术,对Nb-Cr-Mo三元系在1 000和1 200 ℃时全成分的等温截面相图进行了实验测定,并结合实验数据和已报道的相平衡实验信息,基于CALPHAD(calculation of phase diagrams)方法,对Nb-Cr-Mo三元系相图进行了热力学优化与计算,获得了自洽性良好的热力学参数,计算结果与实验数据取得了良好的一致性.

In this work,the phase diagrams of the Nb-Cr-Mo ternary system at 1 000 ℃ and 1 200 ℃ were experimentally determined using a combined method of electron probe microanalysis and X-ray diffraction on the equilibrated alloys.Based on the experimental results from this work and literatures,the Nb-Cr-Mo ternary system was thermodynamically calculated using CALPHAD(calculation of phase diagrams)method,and self consistent thermodynamic parameters were obtained.The calculated results agreed well with the experimental data.

引言
1 实验方法
2 热力学计算
3 结果与讨论
4 结论

表1 Nb-Cr-Mo三元系各个固体相的晶体结构以及热力学模型<br/>Tab.1 Crystal structures and thermodynamic models of the stable solid phases in the Nb-Cr-Mo ternary system

表1 Nb-Cr-Mo三元系各个固体相的晶体结构以及热力学模型
Tab.1 Crystal structures and thermodynamic models of the stable solid phases in the Nb-Cr-Mo ternary system

图2 Nb-Cr-Mo三元系中典型相平衡组织的XRD谱图<br/>Fig.2 XRD patterns of typical phase equilibrium in the Nb-Cr-Mo ternary system

图2 Nb-Cr-Mo三元系中典型相平衡组织的XRD谱图
Fig.2 XRD patterns of typical phase equilibrium in the Nb-Cr-Mo ternary system

图1 Nb-Cr-Mo三元系中典型相平衡组织的背散射电子图<br/>Fig.1 Backscattered electron images of typical phase equilibrium in the Nb-Cr-Mo ternary system

图1 Nb-Cr-Mo三元系中典型相平衡组织的背散射电子图
Fig.1 Backscattered electron images of typical phase equilibrium in the Nb-Cr-Mo ternary system

图3 实验测得的Nb-Cr-Mo三元系在1 000和1 200 ℃的等温截面相图<br/>Fig.3 Phase diagrams experimentally determined isothermal sections of the Nb-Cr-Mo ternary system at 1 000 and 1 200 ℃

图3 实验测得的Nb-Cr-Mo三元系在1 000和1 200 ℃的等温截面相图
Fig.3 Phase diagrams experimentally determined isothermal sections of the Nb-Cr-Mo ternary system at 1 000 and 1 200 ℃

表2 Nb-Cr-Mo三元系在1 000 和1 200 ℃时平衡相的成分<br/>Tab.2 Equilibrium phase compositions of the Nb-Cr-Mo ternary system at 1 000 and 1 200 ℃

表2 Nb-Cr-Mo三元系在1 000 和1 200 ℃时平衡相的成分
Tab.2 Equilibrium phase compositions of the Nb-Cr-Mo ternary system at 1 000 and 1 200 ℃

表3 Nb-Cr-Mo三元系的热力学参数<br/>Tab.3 Thermodynamic parameters of the Nb-Cr-Mo ternary system

表3 Nb-Cr-Mo三元系的热力学参数
Tab.3 Thermodynamic parameters of the Nb-Cr-Mo ternary system

图4 计算的Nb-Cr-Mo三元系在1 000和1 200 ℃的等温截面相图<br/>Fig.4 Phase diagrams calculated isothermal sections of the Nb-Cr-Mo ternary system at 1 000 and 1 200 ℃

图4 计算的Nb-Cr-Mo三元系在1 000和1 200 ℃的等温截面相图
Fig.4 Phase diagrams calculated isothermal sections of the Nb-Cr-Mo ternary system at 1 000 and 1 200 ℃

图5 计算的Nb-Cr-Mo三元系在1 115,1 225和1 550 ℃的等温截面相图<br/>Fig.5 Phase diagrams calculated isothermal sections of the Nb-Cr-Mo ternary system at 1 115,1 225 and 1 550 ℃

图5 计算的Nb-Cr-Mo三元系在1 115,1 225和1 550 ℃的等温截面相图
Fig.5 Phase diagrams calculated isothermal sections of the Nb-Cr-Mo ternary system at 1 115,1 225 and 1 550 ℃

图6 计算的添加不同量Nb元素对Cr-Mo二元系中BCC相两相分离的影响<br/>Fig.6 Calculated BCC phase separation of the Cr-Mo system with different Nb amount addition

图6 计算的添加不同量Nb元素对Cr-Mo二元系中BCC相两相分离的影响
Fig.6 Calculated BCC phase separation of the Cr-Mo system with different Nb amount addition

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备注

引言

1 实验方法

2 热力学计算

3 结果与讨论

4 结论

学报简介

备注

引言

1 实验方法

2 热力学计算

3 结果与讨论

4 结 论

学报简介

4 结论