Heterogeneous nucleation in a glass-forming alloy

被引：16

作者：

Wall, J. J. ^{[1
]}

Liu, C. T. ^{[2
]}

Rhim, W. -K. ^{[3
]}

Li, J. J. Z. ^{[3
]}

Liaw, P. K. ^{[2
]}

Choo, H. ^{[2
]}

Johnson, W. L. ^{[3
]}

机构：

[1] Los Alamos Natl Lab, LANSCE LC, Los Alamos, NM 87545 USA

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[3] CALTECH, Div Engn & Appl Sci, Pasadena, CA 91125 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 24期

关键词：

D O I：

10.1063/1.2948861

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nucleation in the undercooled liquid state in the bulk metallic glass-forming composition Zr52.5Cu17.9Ni14.6Al10Ti5 (VIT-105), produced using high purity (PA) and commercial purity (CA) raw materials was investigated using electrostatic levitation and ex situ neutron diffraction. The CA material was observed to have a lower density than the PA sample and crystallized at relatively shallow undercooling. The densities of the samples at temperatures above the solidus showed an oxygen-dependent hysteresis associated with the state change, indicating the presence of oxygen-stabilized intermetallics. The PA alloy exhibited three distinct crystallization modes dependent on the thermal history of the melt, one of which showed a net volume expansion.

引用

页数：3

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