TY - JOUR
T1 - Heat of evolution and structural analysis on the non-Newtonian viscous flow of Pd40Ni40P20 glassy alloy
AU - Kato, Hidemi
AU - Matsubara, Ei ichiro
AU - Inoue, Akihisa
AU - Nishiyama, Nobuyuki
AU - Chen, H. S.
PY - 2004/7/15
Y1 - 2004/7/15
N2 - The evolution of specific heat of a Pd40Ni40 P20 glassy alloy subjected to different degrees of non-Newtonian flow condition near the glass transition temperature, Tg, was investigated by a differential scanning calorimetry (DSC) method. Three exothermic relaxation spectrums were observed in temperature dependence of the specific heat. One of the relaxations in T>490 K (=Tg-95 K) strongly depended on the flow condition, on the other hand, the others did weakly. This relaxation has previously been reported to be due to the long-range disordering between metal and metalloid constituents. The local atomic structure causing the non-Newtonian flow is therefore expected to show modification among metal and metalloid elements. Using a X-ray diffraction method followed radial distribution function analysis, this modification is observed.
AB - The evolution of specific heat of a Pd40Ni40 P20 glassy alloy subjected to different degrees of non-Newtonian flow condition near the glass transition temperature, Tg, was investigated by a differential scanning calorimetry (DSC) method. Three exothermic relaxation spectrums were observed in temperature dependence of the specific heat. One of the relaxations in T>490 K (=Tg-95 K) strongly depended on the flow condition, on the other hand, the others did weakly. This relaxation has previously been reported to be due to the long-range disordering between metal and metalloid constituents. The local atomic structure causing the non-Newtonian flow is therefore expected to show modification among metal and metalloid elements. Using a X-ray diffraction method followed radial distribution function analysis, this modification is observed.
KW - Glassy alloy
KW - Non-Newtonian viscous flow
KW - Structural relaxation
KW - X-ray diffraction analysis
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U2 - 10.1016/j.msea.2003.10.096
DO - 10.1016/j.msea.2003.10.096
M3 - Article
AN - SCOPUS:3142681598
SN - 0921-5093
VL - 375-377
SP - 444
EP - 448
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
IS - 1-2 SPEC. ISS.
ER -