PRESSURE-INDUCED METASTABLE AMORPHIZATION OF BAS - EVIDENCE FOR A KINETICALLY FRUSTRATED PHASE-TRANSFORMATION

被引：67

作者：

GREENE, RG ^{[1
]}

LUO, H ^{[1
]}

RUOFF, AL ^{[1
]}

TRAIL, SS ^{[1
]}

DISALVO, FJ ^{[1
]}

机构：

[1] CORNELL UNIV,DEPT CHEM,ITHACA,NY 14853

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.73.2476

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A transformation from the zinc blende (zb) to an amorphous crystal structure was observed at 125 GPa, just slightly above the calculated equilibrium transition pressure to the rock salt phase [Phys. Rev. B 36, 6058 (1987)]. This is the first evidence that pressure induced amorphization in AB compounds is a kinetically frustrated process. The amorphous state persisted on further loading to 165 GPa, and throughout down-loading to 0 GPa. The Birch coefficients of the equation of state for the zb phase were determined to be B-0 = 148 +/- 6 GPa and B'(0) = 3.9 +/- 0.3, in good agreement with theoretical calculations.

引用

页码：2476 / 2479

页数：4

共 23 条

[1] ENERGY DISPERSIVE-X-RAY DIFFRACTION FROM HIGH-PRESSURE POLYCRYSTALLINE SPECIMENS USING SYNCHROTRON RADIATION [J].