In situ phase separation and flow behavior in the glass transition region

被引：24

作者：

Louzguine-Luzgin, Dmitri V. ^{[1
,2
]}

Wada, Takeshi ^{[2
]}

Kato, Hidemi ^{[2
]}

Perepezko, John ^{[1
,3
]}

Inoue, Akihisa ^{[1
,2
]}

机构：

[1] Tohoku Univ, WPI Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[3] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

来源：

INTERMETALLICS | 2010年 / 18卷 / 06期

关键词：

Bulk metallic glass; Viscosity; Transmission electron microscopy (TEM); X-ray diffraction (XRD); BULK METALLIC-GLASS; CU-ZR SYSTEM; SUPERCOOLED LIQUID; AMORPHOUS-ALLOYS; MECHANICAL-PROPERTIES; FORMING ABILITY; BINARY; MICROSTRUCTURE; PLASTICITY; VISCOSITY;

D O I：

10.1016/j.intermet.2010.03.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The temperature dependence of length change and viscous flow of the Cu36Zr48Al8Ag8 glassy alloy is examined in both the glass transition and supercooled liquid regions. Moreover, this alloy is found to exhibit phase separation rather by binodal mechanism in the glassy phase prior to crystallization. There is an apparent decrease in viscosity observed upon crystallization that is connected with the densification of the sample, but the intrinsic viscosity does not rise significantly until the initial crystallization process is almost complete. During the process the partly crystallized supercooled liquid still behaves like a fluid until a large fraction of the crystalline phase (similar to 90%) is formed. This new insight on flow behavior opens up possibilities for innovative processing of precise bulk shapes with high nanocrystal densities. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1235 / 1239

页数：5

共 33 条

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