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Finite size effects in the crystallization of a bulk metallic glass

Authors :
Jan Schroers
Golden Kumar
Manesh Gopinadhan
Sundeep Mukherjee
Chinedum O. Osuji
Yanhui Liu
Ryan C. Sekol
André D. Taylor
Zhen Shao
Source :
Applied Physics Letters. 103:111912
Publication Year :
2013
Publisher :
AIP Publishing, 2013.

Abstract

We explore finite size effects in the crystallization of a bulk metallic glass with nm-scale dimensions. Nanorods of Pt57.5Cu14.7Ni5.3P22.5 are produced by thermoplastic extrusion of supercooled liquid through a nanoporous template. The nanorods exhibit remarkable differences in their crystallization behavior above the glass transition. Crystallization for 100 and 200 nm diameter nanorods occurred at 6 and 24 °C lower, respectively, than the nominal crystallization temperature for bulk material while the glass transition temperatures were unchanged from the bulk value. Size dependent crystallization kinetics is discussed within a framework of classical nucleation theory, as well as possible shear and surface-induced effects.

Details

ISSN :
10773118 and 00036951
Volume :
103
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........d022842cef33880ae45293637f928ce5