Correlation between icosahedral short range order, glass forming ability, and thermal stability of Zr-Ti-Ni-Cu-(Be) glasses

被引：21

作者：

Mechler, S. ^{[1
]}

Schumacher, G. ^{[1
]}

Zizak, I. ^{[1
]}

Macht, M.-P. ^{[1
]}

Wanderka, N. ^{[1
]}

机构：

[1] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 02期

关键词：

D O I：

10.1063/1.2755924

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structure and the crystallization behavior of the bulk metallic glass Zr46.8Ti8.2Ni10Cu7.5Be27.5 and of its Be-free derivative Zr64.5Ti11.4Ni13.8Cu10.3 are analyzed by means of differential scanning calorimetry, transmission electron microscopy, and x-ray diffraction. These alloys reveal different glass forming abilities. Thermal stability and crystallization behavior of the glasses are also different. These differences are correlated with the different degrees of icosahedral short range order in the glasses. Results fit to the model of geometric frustration, which describes the structure of metallic glasses as "highly defective quasicrystals." In the present case Be degrades the ideal quasicrystalline structure. (C) 2007 American Institute of Physics.

引用

页数：3

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