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Glass-forming ability of the Ni–Zr and Ni–Ti systems determined by interatomic potentials

Published online by Cambridge University Press:  31 January 2011

W. S. Lai  and
B. X. Liu
W. S. Lai*
Affiliation:
Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China and State Key Laboratory of Solid State Microstructure Physics, Nanjing University, Nanjing 200093, People's Republic of China
B. X. Liu
Affiliation:
Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China and State Key Laboratory of Solid State Microstructure Physics, Nanjing University, Nanjing 200093, People's Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Employing the n-body potentials of the Ni–Zr and Ni–Ti systems, we performed molecular dynamics simulation to study the relative stability of the terminal solid solutions versus the corresponding amorphous states as a function of solute concentrations. The terminal solid solutions transformed into amorphous states spontaneously when the solute concentrations were beyond the maximum allowable values; i.e., the critical solubilities were determined to be 14 at.% Zr in Ni and 25 at.% Ni in Zr for Ni–Zr system and 38 at.% Ti in Ni and 15 at.% Ni in Ti for the Ni–Ti system. The physical implication of the critical concentrations, as well as their correlation with the glass-forming abilities of the Ni–Zr and Ni–Ti systems, is discussed.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 2 , February 2001 , pp. 446 - 450
Copyright
Copyright © Materials Research Society 2001

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References

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