SANS of bulk metallic ZrTiCuNiBe glasses

被引：26

作者：

Schneider, S

Thiyagarajan, P

Geyer, U

Johnson, WL

机构：

[1] Argonne Natl Lab, IPNS Div, Argonne, IL 60439 USA

[2] Univ Gottingen, D-37073 Gottingen, Germany

[3] SFB, D-37073 Gottingen, Germany

[4] CALTECH, Pasadena, CA 91125 USA

来源：

PHYSICA B | 1997年 / 241卷

关键词：

SANS; bulk metallic glasses; decomposition; crystallization;

D O I：

10.1016/S0921-4526(97)00753-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The evolution of decomposition and succeeding primary crystallization in the bulk amorphous Zr41.2Ti13.8Cu12.5Ni10Be22.5 alloy have been studied by small-angle neutron scattering. Samples annealed isothermally in the supercooled liquid and in the solid-state exhibit correlation peaks indicating quasiperiodic inhomogeneities in the scattering length density. The peak positions vary as a function of temperature as predicted by the linear Cahn-Hilliard theory of spinodal decomposition. Variations of the Be-Ti composition ratio of the alloy leads to significant changes in scattering signals. The initially homogeneous alloy separates into two amorphous phases. In the decomposed regions, crystallization probability increases leading to polymorphic crystallization. Published by Elsevier Science B.V.

引用

页码：918 / 920

页数：3

共 10 条

[1] THERMODYNAMICS AND KINETICS OF THE UNDERCOOLED LIQUID AND THE GLASS-TRANSITION OF THE ZR41.2TI13.8CU12.5NI10.0BE22.5 ALLOY [J].