Density and Enthalpy Relaxation Behavior in a Bulk Pd40Ni40P20 Metallic Glass

Abstract:

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The kinetics of structural relaxation in a Pd40Ni40P20 bulk metallic glass was investigated by the volume relaxation due to density experiments and the enthalpy relaxation due to specific heat experiments. A two-step relaxation process was found in the volume relaxation, while the enthalpy relaxation seemed to be one-step relaxation process with a spectrum of relaxation times. First-step volume relaxation only in as-quenched glass was the process with a spread of relaxation times at lower relaxing temperature, while a Debye-type relaxation behavior was observed at higher temperature near Tg and in pre-annealed glass. The comparison of the kinetics of volume and enthalpy relaxations at the same temperature showed a disagreement with the prediction of free volume theory.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1283-1286

DOI:

10.4028/www.scientific.net/MSF.561-565.1283

Citation:

O. Haruyama and S. Yamada, "Density and Enthalpy Relaxation Behavior in a Bulk Pd40Ni40P20 Metallic Glass", Materials Science Forum, Vols. 561-565, pp. 1283-1286, 2007

Online since:

October 2007

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$35.00

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