Chemical ordering around open-volume regions in bulk metallic glass Zr52.5Ti5Al10Cu17.9Ni14.6

被引：46

作者：

Asoka-Kumar, P ^{[1
]}

Hartley, J ^{[1
]}

Howell, R ^{[1
]}

Sterne, PA ^{[1
]}

Nieh, TG ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Dept Phys, Livermore, CA 94550 USA

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 13期

关键词：

D O I：

10.1063/1.1313367

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We provide direct experimental evidence for a nonrandom distribution of atomic constituents in Zr(52.5)Ti(5)Al(10)Cu(17.9)Ni(14.6) bulk metallic glass using positron annihilation spectroscopy. The Ti content around the open-volume regions is significantly enhanced at the expense of Ni and Cu. Our results indicate that Ni and Cu atoms closely occupy the volume bounded by their neighboring atoms while Al, Ti, and Zr are less closely packed, and more likely to be associated with the open-volume regions. The overall distribution of elements seen by the positron is not significantly altered by annealing or by crystallization. Theoretical calculations indicate that the observed elemental distribution is not consistent with the known crystalline phases Zr(2)Cu and NiZr(2), while Al(3)Zr(4) shows some of the characteristics seen in the experiment. (C) 2000 American Institute of Physics. [S0003-6951(00)05139-1].

引用

页码：1973 / 1975

页数：3

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