APPLICATIONS OF THE EMBEDDED-ATOM METHOD TO GLASS-FORMATION AND CRYSTALLIZATION OF LIQUID AND GLASS TRANSITION-METAL NICKEL

Authors
Citation
J. Lu et Ja. Szpunar, APPLICATIONS OF THE EMBEDDED-ATOM METHOD TO GLASS-FORMATION AND CRYSTALLIZATION OF LIQUID AND GLASS TRANSITION-METAL NICKEL, Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties, 75(4), 1997, pp. 1057-1066
Citations number
27
Categorie Soggetti
Physics, Applied","Material Science","Physics, Condensed Matter","Metallurgy & Metallurigical Engineering
ISSN journal
13642804
Volume
75
Issue
4
Year of publication
1997
Pages
1057 - 1066
Database
ISI
SICI code
1364-2804(1997)75:4<1057:AOTEMT>2.0.ZU;2-P
Abstract
The embedded-atom method (EAM) has been applied to investigate the eff ect of different cooling rates on the glass formation and crystallizat ion processes in supercooled metallic liquid nickel. The crystallizati on of metallic glass as a of increasing temperatures was also studied, using the constant-pressure molecular-dynamics simulation. The result s indicate that the agreements between the calculated and experimental pair distribution functions and atomic volumes for the liquid nickel are quite good. The microstructure is greatly affected by the quenchin g rate. The non-equilibrium phase obtained in a supercooled liquid thr ough a Fast quenching process is a metallic glass, and the equilibrium phase resulting from slow cooling rate is a fee-type crystal phase. M etallic glass is unstable during quenching and, with an increase in te mperature, crystallization of the metallic glass occurs. The crystal s tructure resulting from the crystallization process is a fee-type stru cture. The calculated relationships between the atomic volume, pair st ructural indexes and temperature provide a good picture of the structu ral transformations and results which are consistent with the results obtained experimentally.