SUPERHEATING AND SUPERCOOLING OF LEAD PRECIPITATES IN ALUMINUM

被引：152

作者：

GRABAEK, L ^{[1
]}

BOHR, J ^{[1
]}

JOHNSON, E ^{[1
]}

JOHANSEN, A ^{[1
]}

SARHOLTKRISTENSEN, L ^{[1
]}

ANDERSEN, HH ^{[1
]}

机构：

[1] HC ORSTED INST, PHYS LAB, DK-2100 COPENHAGEN 0, DENMARK

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.64.934

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Thermal hysteresis is observed in x-ray-diffraction studies of the melting and solidification of small crystalline precipitates of lead in aluminum. Reproducible superheating as well as supercooling is present in succesive heating sequences demonstrating that they are intrinsic physical phenomena. For lead precipitates of mean size 140 and 270 A the width of the hysteresis loop is 88 and 62 K, respectively. These results are discussed in a phenomenological context considering the lack of free surfaces. © 1990 The American Physical Society.

引用

页码：934 / 937

页数：4

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