OBSERVATION OF THE UNDERCOOLABILITY OF QUASI-CRYSTAL-FORMING ALLOYS BY ELECTROMAGNETIC-LEVITATION

被引：123

作者：

HOLLANDMORITZ, D ^{[1
]}

HERLACH, DM ^{[1
]}

URBAN, K ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM JULICH, INST FESTKORPERFORSCH, W-5170 JULICH 1, GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.71.1196

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electromagnetic levitation technique is applied to undercool melts of quasicrystal-forming alloys of Al-Cu-Co and Al-Cu-Fe. Undercooling with respect to the solidification of the decagonal phase (quasiperiodic in two dimensions) and the icosahedral phase (quasiperiodic in three dimensions) is measured in situ by contactless temperature measurements. The undercoolings are analyzed within nucleation theory. The results indicate that the activation energy for the formation of the nuclei of quasicrystalline phases is lower than that of crystalline phases. The decrease of activation energy is more pronounced for the icosahedral phase than for the decagonal phase.

引用

页码：1196 / 1199

页数：4

共 19 条

[1] SOME THERMODYNAMIC AND KINETIC ASPECTS OF ICOSAHEDRAL PHASE NUCLEATION IN AL-MN [J].