TITLE

Bulk glassy Cu-based alloys with a large supercooled liquid region of 110 K

AUTHOR(S)
Akihisa Inoue; Wei Zhanga
PUB. DATE
September 2003
SOURCE
Applied Physics Letters;9/22/2003, Vol. 83 Issue 12, p2351
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The replacement of Cu by 5%Ag for Cu[sub 50]Hf[sub 45]Al[sub 5] glassy alloy was found to increase significantly the stability of supercooled liquid against crystallization. The supercooled liquid region reached as large as 110 K for Cu[sub 45]Hf[sub 45]Al[sub 5]Ag[sub 5]. The extension of the supercooled liquid region is due to an increase in the crystallization temperature, accompanying the change in the primary crystalline phases. The effectiveness of Ag addition was interpreted to result from the retardation of long-range atomic rearrangements for the progress of crystallization reaction. The selection of the quaternary composition enabled us to form bulk glassy alloys with diameters up to 3 mm. The Young’s modulus and compressive fracture strength of the 5%Ag-containing alloy are 119 GPa and 2220 MPa, respectively. © 2003 American Institute of Physics.
ACCESSION #
10848416

 

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