Heat of evolution and non-Newtonian viscous flow of Pd40Ni40P20 glassy alloy

被引：0

作者：

Nishiyama, Nobuyuki ^{[1
]}

Kato, Hidemi ^{[2
]}

Saida, Junji ^{[3
]}

Inoue, Akihisa ^{[2
]}

Chen, Ho-Sou ^{[4
]}

机构：

[1] Inoue Supercooled Glass Project, ERATO, Japan Science and Technology Corporation (JST), Sendai 982-0807, Japan

[2] Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

[3] Bell Laboratories, Murray Hill, NJ 07974, United States

[4] Graduate School of Materials Science, Chinese Culture University, Yangmingsan, Taipei, Taiwan

来源：

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers | 2002年 / 41卷 / 2 A期

关键词：

Differential scanning calorimetry - Glass - Glass transition - Non Newtonian flow - Relaxation processes - Specific heat - Viscous flow;

D O I：

10.1143/jjap.41.741

中图分类号：

学科分类号：

摘要：

The evolution of specific heat of a Pd40Ni40P20 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 and is due to the long-range disordering between metal and metalloid constituents. Thus, appearance of the non-Newtonian viscous flow in this glassy alloy is associated with the disordering of the glass skeleton framed with Pd-P and Ni-P coupling by the strong shear action.

引用

页码：741 / 745