Nucleation in undercooled Zr41Ti14Cu12Ni10Be23 melts

被引：21

作者：

Schroers, J ^{[1
]}

Busch, R ^{[1
]}

Masuhr, A ^{[1
]}

Johnson, WL ^{[1
]}

机构：

[1] CALTECH, Keck Lab Engn Mat 138 78, Pasadena, CA 91125 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1999年 / 250卷

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/S0022-3093(99)00163-5

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The undercooling and solidification of bulk glass forming Zr41Ti14Cu12Ni10Be23 liquids is investigated by processing in high purity graphite crucibles. Isothermal nucleation studies are performed between the liquidus and the glass transition temperature. The resulting time-temperature-transformation diagram is similar to the diagram obtained from containerlessly processed samples. Heterogeneous surface nucleation at the container walls does not effect the crystallization. The solidification products of these differently processed specimens are investigated by scanning electron microscopy as well as by electron microprobe. The investigations reveal the morphology and typical length scale of the microstructure after crystallization at different degrees of undercooling. The number density of nuclei during primary crystallization is estimated from the microstructure. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：699 / 703

页数：5