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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.42  No.4 (2001)  >  pp.606-612

MATERIALS TRANSACTIONS
<<Previous article Vol.42  No.4 (2001)   pp.606 - 612 Next article>>

Pressure Effects on Elastic Properties and Glass Transition of Zr-, Pd-based Bulk Metallic Glasses

W. K. Wang1)2)
1) Center for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
2) College of Material Sciences and Chemical Engineering, Yanshan University


The structures and properties of materials are profoundly altered under high pressure due to a large change of atom spacing, chemical bonding and Gibbs free energies. Therefore, materials with novel structures and properties can be created via a process known as pressure-induced phase transition. Here we report the investigations of pressure effects on the elastic properties and the glass transition of Zr-, Pd-based bulk metallic glasses (BMGs). The elastic constants and the Debye temperatures, of a Zr41Ti14Cu12.5Ni10Be22.5C1 and a Pd39Ni10Cu30P21 BMGs are measured by using an ultrasonic technique, and their pressure dependence is exhibited. The equations of state (EOS) of the two BMGs are established. The acoustic attenuation behaviors are also monitored with various pressure in the two BMGs, and a marked difference between the two BMGs is revealed. The effects of pressure-induced structural relaxation on the glass transition of the Pd39Ni10Cu30P21 BMG are investigated by a temperature-modulated differential scanning calorimetry technique. The pressure dependence of the reversible and irreversible glass transition is explained.


Keyword:
bulk metallic glasses, phase transition, elastic constants, ultrasonic attenuation, glass transition, high pressure

Received: December 06, 2000
Accepted: February 01, 2001 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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