Systematic measurement of thermal diffusivity of Pd 40 Cu 40 − x Ni x P 20 ( x = 0 ,10,40) alloys in liquid, glassy, crystallized, and supercooled liquid states by the laser flash method
Systematic measurement of thermal diffusivity of Pd 40 Cu 40 − x Ni x P 20 ( x = 0 ,10,40) alloys in liquid, glassy, crystallized, and supercooled liquid states by the laser flash method
复制标题
DOI：
10.1103/physrevb.70.174204
复制
发表时间：
2004-11
影响因子：
3.7
通讯作者：
T. Nishi;H. Shibata;H. Ohta;N. Nishiyama;A. Inoue;Y. Waseda
中科院分区：
文献类型：
--
作者：
T. Nishi;H. Shibata;H. Ohta;N. Nishiyama;A. Inoue;Y. Waseda
The availability of the thermal diffusivity values, $\ensuremath{\alpha}$, of alloy liquids and their glassy states is very limited at the present time, although the thermal diffusivity values of alloy liquids might have a close relationship with their glass-forming ability. Thus, the purpose of this work is to determine the thermal diffusivity values of three particular alloys, ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{30}{\mathrm{Ni}}_{10}{\mathrm{P}}_{20}$, ${\mathrm{Pd}}_{40}{\mathrm{Ni}}_{40}{\mathrm{P}}_{20}$, and ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{40}{\mathrm{P}}_{20}$, in the liquid state, systematically obtained using a laser flash method involving a novel sample cell. In the liquid state, the thermal diffusivity value of the ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{30}{\mathrm{Ni}}_{10}{\mathrm{P}}_{20}$ alloy showing an outstandingly high glass-forming ability is lower than that of the ${\mathrm{Pd}}_{40}{\mathrm{Ni}}_{40}{\mathrm{P}}_{20}$ alloy and it is much lower than that of the ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{40}{\mathrm{P}}_{20}$ alloy which has a low glass-forming ability. With respect to the thermal diffusivity values of the ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{30}{\mathrm{Ni}}_{10}{\mathrm{P}}_{20}$ alloy, a positive temperature dependence was certainly obtained in all conditions: The glassy, supercooled liquid, and liquid states.
The availability of the thermal diffusivity values, $\ensuremath{\alpha}$, of alloy liquids and their glassy states is very limited at the present time, although the thermal diffusivity values of alloy liquids might have a close relationship with their glass-forming ability. Thus, the purpose of this work is to determine the thermal diffusivity values of three particular alloys, ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{30}{\mathrm{Ni}}_{10}{\mathrm{P}}_{20}$, ${\mathrm{Pd}}_{40}{\mathrm{Ni}}_{40}{\mathrm{P}}_{20}$, and ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{40}{\mathrm{P}}_{20}$, in the liquid state, systematically obtained using a laser flash method involving a novel sample cell. In the liquid state, the thermal diffusivity value of the ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{30}{\mathrm{Ni}}_{10}{\mathrm{P}}_{20}$ alloy showing an outstandingly high glass-forming ability is lower than that of the ${\mathrm{Pd}}_{40}{\mathrm{Ni}}_{40}{\mathrm{P}}_{20}$ alloy and it is much lower than that of the ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{40}{\mathrm{P}}_{20}$ alloy which has a low glass-forming ability. With respect to the thermal diffusivity values of the ${\mathrm{Pd}}_{40}{\mathrm{Cu}}_{30}{\mathrm{Ni}}_{10}{\mathrm{P}}_{20}$ alloy, a positive temperature dependence was certainly obtained in all conditions: The glassy, supercooled liquid, and liquid states.