TY - GEN
T1 - Relaxation kinetics of bulk metallic glasses below glass transition temperature
AU - Haruyama, O.
AU - Yokoyama, Y.
AU - Kimura, H. M.
AU - Inoue, A.
AU - Nishiyama, N.
PY - 2007
Y1 - 2007
N2 - The free volume relaxation just under the glass transition region was investigated by the high-resolution density measurement using the bulk metallic glasses with the compositions of Pd40Ni40P20 and Zr55Cu30Ni5Al10. The relaxation process was well described by a stretched exponential function with Kohlrausch exponent values less than unity. The reduced free volumes in an as-quenched state were estimated as 0.0117 and 0.0353 for Pd40Ni 40P20 glass and Zr55Cu30Ni 5Al10 glass, respectively. The specific heat curves C P(T) for Pd42.5Cu30Ni7.5P 20 alloy were obtained for the supercooled liquid, the equilibrium liquid and the crystallized alloy. The isenthalpic Kauzmann temperature T KH and isentropic Kauzmann temperature TKS were estimated as 471 K and 522 K, respectively, from the specific heat data.
AB - The free volume relaxation just under the glass transition region was investigated by the high-resolution density measurement using the bulk metallic glasses with the compositions of Pd40Ni40P20 and Zr55Cu30Ni5Al10. The relaxation process was well described by a stretched exponential function with Kohlrausch exponent values less than unity. The reduced free volumes in an as-quenched state were estimated as 0.0117 and 0.0353 for Pd40Ni 40P20 glass and Zr55Cu30Ni 5Al10 glass, respectively. The specific heat curves C P(T) for Pd42.5Cu30Ni7.5P 20 alloy were obtained for the supercooled liquid, the equilibrium liquid and the crystallized alloy. The isenthalpic Kauzmann temperature T KH and isentropic Kauzmann temperature TKS were estimated as 471 K and 522 K, respectively, from the specific heat data.
KW - Bulk metallic glass
KW - Free volume
KW - Glass transition
KW - Kauzmann temperature
KW - Structural relaxation
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U2 - 10.4028/0-87849-428-6.2059
DO - 10.4028/0-87849-428-6.2059
M3 - Conference contribution
AN - SCOPUS:38349031040
SN - 0878494286
SN - 9780878494286
T3 - Materials Science Forum
SP - 2059
EP - 2064
BT - Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006
PB - Trans Tech Publications Ltd
T2 - 5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
Y2 - 4 July 2006 through 8 July 2006
ER -