TY - JOUR
T1 - Thermal expansion and specific volume of Pd40Cu30Ni10P20 alloy in various states
AU - Nishiyama, Nobuyuki
AU - Horino, Maki
AU - Inoue, Akihisa
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2000/11
Y1 - 2000/11
N2 - We measured the thermal expansion and specific volume of the Pd40Cu30Ni10P20 alloy by thermomechanical analyzer (TMA), fluid (H2O) displacement and volume dilatometric methods. At room temperature (293 K), the specific volumes of the Pd40Cu30Ni10P20 thermal expansion alloy in the relaxed glassy and crystalline states are 0.1070 and 0.1065 m3Mg, respectively. The average linear coefficients of are 17.0 × 10-6 K-1 at 323 to 523 K in the relaxed glassy state (αrelax), 14.2 × 10-6 K-1 at 323-673 K in the crystalline state (αcry) and 39.9 × 10-6 K-1 at 873-1223 K in the liquid (αliq). Based on these results, the specific volume of the Pd40Cu30Ni10P20 alloy as a function of temperature, V(T), is estimated. The extrapolation line of the specific volume for the equilibrium liquid is smoothly connected to the specific volume for the supercooled liquid. On the other hand, the intersection point of the specific volume between the extrapolation of equilibrium liquid and crystal is evaluated at 527 K. In the assumption that the temperature of the intersection point corresponds to the entropic stability limit for the undercooled liquid, it is much lower than that of previous thermodynamic study.
AB - We measured the thermal expansion and specific volume of the Pd40Cu30Ni10P20 alloy by thermomechanical analyzer (TMA), fluid (H2O) displacement and volume dilatometric methods. At room temperature (293 K), the specific volumes of the Pd40Cu30Ni10P20 thermal expansion alloy in the relaxed glassy and crystalline states are 0.1070 and 0.1065 m3Mg, respectively. The average linear coefficients of are 17.0 × 10-6 K-1 at 323 to 523 K in the relaxed glassy state (αrelax), 14.2 × 10-6 K-1 at 323-673 K in the crystalline state (αcry) and 39.9 × 10-6 K-1 at 873-1223 K in the liquid (αliq). Based on these results, the specific volume of the Pd40Cu30Ni10P20 alloy as a function of temperature, V(T), is estimated. The extrapolation line of the specific volume for the equilibrium liquid is smoothly connected to the specific volume for the supercooled liquid. On the other hand, the intersection point of the specific volume between the extrapolation of equilibrium liquid and crystal is evaluated at 527 K. In the assumption that the temperature of the intersection point corresponds to the entropic stability limit for the undercooled liquid, it is much lower than that of previous thermodynamic study.
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U2 - 10.2320/matertrans1989.41.1432
DO - 10.2320/matertrans1989.41.1432
M3 - Article
AN - SCOPUS:0034313868
VL - 41
SP - 1432
EP - 1434
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 11
ER -