EVIDENCES OF TRANSITORY METASTABLE PHASES IN REFRACTORY-METALS SOLIDIFIED FROM HIGHLY UNDERCOOLED LIQUIDS IN A DROP TUBE

被引：76

作者：

CORTELLA, L

VINET, B

DESRE, PJ

PASTUREL, A

PAXTON, AT

VANSCHILFGAARDE, M

机构：

[1] INST NATL POLYTECH GRENOBLE,THERMODYNAM & PHYSICOCHIM MET LAB,F-38042 ST MARTIN DHERES,FRANCE

[2] SRI INT,MENLO PK,CA 94025

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.70.1469

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Brightness traces of the solidification of highly undercooled Ta and Re droplets processed in an ultrahigh vacuum drop tube give evidences of two successive phase transformations. First-principles calculations of the structural stability of these metals are developed in order to appreciate the possibilities of obtaining alternative phases. Some prototype transition metal crystal structures were examined and the fcc phase for Re and the A15 phase for Ta are possible candidates for the observed metastable phases. Good agreement is obtained between theoretical calculations and experimental measurements of their respective melting temperatures.

引用

页码：1469 / 1472

页数：4

共 30 条

[1] ELECTRONIC-STRUCTURE OF TRANSITION-METAL COMPOUNDS - GROUND-STATE PROPERTIES OF THE 3D-MONOXIDES IN THE ATOMIC SPHERE APPROXIMATION [J].