Time-temperature superposition of structural relaxation in a viscous metallic liquid

Authors
Meyer, A Busch, R Schober, H
Citation
A. Meyer et al., Time-temperature superposition of structural relaxation in a viscous metallic liquid, PHYS REV L, 83(24), 1999, pp. 5027-5029
Citations number
17
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
24
Year of publication
1999
Pages
5027 - 5029
Database
ISI
SICI code
0031-9007(199912)83:24<5027:TSOSRI>2.0.ZU;2-P
Abstract
Bulk metallic glass-forming Pd40Ni10Cu30P20 has been investigated in its eq uilibrium liquid by quasielastic neutron scattering. The quasielastic signa l exhibits a structural relaxation as known from nonmetallic viscous liquid s. Even well above the melting point, the structural relaxation is nonexpon ential and obeys a universal time-temperature superposition. From the mean relaxation times average diffusivities have been determined, resulting in v alues on a 10(-10) m(2) s(-1) scale, 3 orders of magnitude slower than in s imple metallic liquids.