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Significant Undercooled Liquid Region of Over 200K in Rare Earth Based Metallic Glasses

Published online by Cambridge University Press:  10 February 2011

Z. P. Lu ,
Y. Li ,
S. C. Ng  and
Y. P. Feng
Z. P. Lu
Affiliation:
Department of Materials Science, National University of Singapore, Singapore 119260
Y. Li
Affiliation:
Department of Materials Science, National University of Singapore, Singapore 119260
S. C. Ng
Affiliation:
Department of Physics, National University of Singapore, Singapore 119260
Y. P. Feng
Affiliation:
Department of Physics, National University of Singapore, Singapore 119260
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Abstract

Using a newly developed temperature modulated differential scanning calorimetry (TMDSC), glass transition has been detected in several RE-Fe-Al (RE = ND, Pr, Sm and Y) metallic glasses, which can not be observed by a conventional DSC. Our results show that the glass transition occurred together with a small fraction crystallization in the as-spun samples, the final main crystallization transition occurred at higher temperature (over 720K) in these rare-earth based alloys. Large undercooled liquid regions up to 200K at a underlying heating rate of 5K/min have been observed in these glasses.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 554: Symposium MM – Bulk Metallic Glasses , 1998 , 205
Copyright
Copyright © Materials Research Society 1999

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