Rheometry and crystallization of bulk metallic glass forming alloys at high temperatures

被引：24

作者：

Masuhr, A ^{[1
]}

Busch, R ^{[1
]}

Johnson, WL ^{[1
]}

机构：

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

来源：

MECHANICALLY ALLOYED, METASTABLE AND NANOCRYSTALLINE MATERIALS, PART 2 | 1998年 / 269-2卷

关键词：

bulk metallic glasses; crystallization; undercooled liquid; thermodynamics; rheology; phase separation;

D O I：

10.4028/www.scientific.net/MSF.269-272.779

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Melts of the Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 bulk metallic glass forming alloy contained in high purity graphite crucibles have been supercooled allowing for the measurement of thermodynamic and rheological properties of the equilibrium and supercooled liquid. Strong resistance to heterogeneous nucleation is found and amorphous samples can be formed with critical cooling rates of less than 2 K/s, comparable to results found from levitation experiments. Complementary experiments under isothermal conditions and linear continuous cooling cannot be described by an effective steady state nucleation rate in the framework of classical nucleation theory.

引用

页码：779 / 784

页数：6

共 20 条

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