...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Experimental measurement and thermodynamic optimization on the solidus miscibility gap of the Mo-V binary and the Mo-Nb-V ternary systems
【24h】

Experimental measurement and thermodynamic optimization on the solidus miscibility gap of the Mo-V binary and the Mo-Nb-V ternary systems

机译：实验测量和热力学优化对MO-V二元和MO-NB-V三元系统的固定混溶性差距

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The solidus miscibility gap and the phase relations of the Mo-V binary system at the low temperature region below 851 degrees C have been determined by experimental approaches. The homogenized alloy samples were measured by differential scanning calorimetry (DSC), and the obtained results indicate that below 851 degrees C there exists an immiscible area. The observations of both the alloy samples and the diffusion couples isothermally treated at 600 and 750 degrees C by electron probe microanalysis (EPMA) reveal the separations of the solid solution phase (BCC_A2) into two phases, the Mo-rich Bcc_A2(Mo,V)1 (beta(Mo)) and the V-rich Bcc_A2(Mo,V)2 (beta(V)) phases, which have the same crystal structure but different compositions. Two typical phase decomposition mechanisms, the nucleation-growth and the spinodal decomposition, are confirmed by means of the transmission electron microscopy (TEM). By consideration of the present experimental data for the solidus miscibility gap and the related literature reports for the liquid-solid phase equilibria, the phase diagram of the Mo-V binary system was constructed. Then a set of self-consistent thermodynamic parameters for describing the Gibbs energies of the constituent phases was assessed. The thermodynamic calculations agree well with the experimental data of the solidus miscibility gap and the spinodal decomposition range of the Mo-V binary system. Furthermore, on the basis of the studies on the Mo-V and the Nb-V binary systems, the isothermal sections of the Mo-Nb-V ternary system at 600 and 750 degrees C were experimentally measured and thermodynamically optimized. The experimental isothermal sections compare well with the result of the thermodynamic calculations. (C) 2020 Elsevier B.V. All rights reserved.
机译：用实验方法测定了钼钒二元系在851℃以下低温区的固相混溶间隙和相关系。用差示扫描量热法（DSC）对均匀化的合金样品进行了测量，结果表明，在851℃以下存在不混溶区。通过电子探针显微分析（EPMA）对合金样品和在600和750℃等温处理的扩散偶的观察，揭示了固溶体相（BCC_A2）分离为两个相，即富钼BCC_A2（Mo，V）1（β（Mo））和富钒BCC_A2（Mo，V）2（β（V））相，它们具有相同的晶体结构，但组成不同。通过透射电子显微镜（TEM）证实了两种典型的相分解机制：成核生长和调幅分解。根据现有的固相混溶间隙实验数据和液-固相平衡的相关文献报道，构建了Mo-V二元体系的相图。然后评估了一组描述组成相吉布斯能的自洽热力学参数。热力学计算结果与Mo-V二元系固相混溶间隙和旋节分解范围的实验数据吻合良好。此外，在Mo-V和Nb-V二元系研究的基础上，对Mo-Nb-V三元系在600和750℃下的等温截面进行了实验测量和热力学优化。实验等温截面与热力学计算结果比较吻合。（C） 2020爱思唯尔B.V.版权所有。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号