TY - JOUR
T1 - Viscosity measurements of Zr55Cu30Al10Ni5 and Zr50Cu40-xAl10Pdx (x = 0, 3 and 7 at.%) supercooled liquid alloys by using a penetration viscometer
AU - Maeda, S.
AU - Yamasaki, T.
AU - Yokoyama, Y.
AU - Okai, D.
AU - Fukami, T.
AU - Kimura, H. M.
AU - Inoue, A.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2007/3/25
Y1 - 2007/3/25
N2 - Viscosity of Zr55Cu30Al10Ni5 and Zr50Cu40-xAl10Pdx (x = 0, 3 and 7 at.%) supercooled liquid alloys having bulk metallic glass forming ability has been measured by using a penetration viscometer with a cylindrical probe under high speed heating conditions at heating rates between 20 and 400 K/min in the temperature range from the glass transition temperatures (Tg) up to above the crystallization temperatures. Effect of Pd addition on the viscosity of Zr-base supercooled liquid alloys has been also examined. The viscosity of these alloys decreased with increasing the heating rate and tended to saturate at the heating rate of 200 K/min and above. These viscosities can be well represented by the Arrhenius relation. The activation energy for viscous flow for Zr55Cu30Al10Ni5 supercooled liquid alloys was about 350 kJ/mol. In the Zr50Cu40-xAl10Pdx (x = 0, 3 and 7 at.%) alloys, the viscosities increased with increasing the Pd-content, while the activation energy for viscous flow decreased from 337 to 276 kJ/mol.
AB - Viscosity of Zr55Cu30Al10Ni5 and Zr50Cu40-xAl10Pdx (x = 0, 3 and 7 at.%) supercooled liquid alloys having bulk metallic glass forming ability has been measured by using a penetration viscometer with a cylindrical probe under high speed heating conditions at heating rates between 20 and 400 K/min in the temperature range from the glass transition temperatures (Tg) up to above the crystallization temperatures. Effect of Pd addition on the viscosity of Zr-base supercooled liquid alloys has been also examined. The viscosity of these alloys decreased with increasing the heating rate and tended to saturate at the heating rate of 200 K/min and above. These viscosities can be well represented by the Arrhenius relation. The activation energy for viscous flow for Zr55Cu30Al10Ni5 supercooled liquid alloys was about 350 kJ/mol. In the Zr50Cu40-xAl10Pdx (x = 0, 3 and 7 at.%) alloys, the viscosities increased with increasing the Pd-content, while the activation energy for viscous flow decreased from 337 to 276 kJ/mol.
KW - Oxygen contamination
KW - Penetration viscometer
KW - Supercooled liquid
KW - Viscosity
KW - ZrCuAlNi
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U2 - 10.1016/j.msea.2006.02.288
DO - 10.1016/j.msea.2006.02.288
M3 - Article
AN - SCOPUS:33847194514
VL - 449-451
SP - 203
EP - 206
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -