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Mechanically Alloyed Amorphous Ti50(Cu0.45Ni0.55)44–xAlxSi4B2 Alloys with Supercooled Liquid Region

Published online by Cambridge University Press:  31 January 2011

L. C. Zhang ,
J. Xu  and
E. Ma
L. C. Zhang
Affiliation:
Shenyang National Laboratory for Materials Sciences, Institute of Metal Research, CAS, 72 Wenhua Road, Shenyang, 110016 China
J. Xu*
Affiliation:
Shenyang National Laboratory for Materials Sciences, Institute of Metal Research, CAS, 72 Wenhua Road, Shenyang, 110016 China
E. Ma
Affiliation:
Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, Maryland 21218
*
a)Address all correspondence to this author. e-mail: jianxu@imr.ac.cn
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Abstract

A high-energy ball milling procedure has been developed to produce amorphous alloys in Ti50(Cu0.45Ni0.55)44−xAlxSi4B2 (x= 0, 4, 8, 12) powder mixtures. The milling products were characterized using x-ray diffraction, differential scanning calorimetry, and transmission electron microscopy. The Ti-based amorphous alloy powders prepared through this solid-state process exhibit a well-defined glass transition and a supercooled liquid region (ΔTx =64 K) close to the largest achieved so far for Ti-based undercooled melts. The substitution of Al for Cu and Ni has beneficial effects on stabilizing the supercooled liquid. Residual nanocrystals of the αTi structure are uniformly dispersed in the amorphous matrix. The composite alloy powders offer the potential for consolidation in the supercooled liquid region to bulk lightweight amorphous alloys and the possibility to attain desirable mechanical properties.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 7 , July 2002 , pp. 1743 - 1749
Copyright
Copyright © Materials Research Society 2002

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