Isothermal Relaxation Behavior in a Pd42:5Cu30Ni7:5P20 Metallic Glass
Isothermal Relaxation Behavior in a Pd42:5Cu30Ni7:5P20 Metallic Glass
复制标题
Pd42:5Cu30Ni7:5P20 金属玻璃中的等温弛豫行为
DOI：
10.2320/matertrans.45.1184
复制
发表时间：
2004
影响因子：
1.2
通讯作者：
A. Inoue
中科院分区：
文献类型：
--
作者：
O. Haruyama;H. Kimura;N. Nishiyama;A. Inoue
的结构弛豫过程进行了研究，为Pd 4 2。5 Cu 3 0 Ni 7 . 5P20金属玻璃（块状和带状样品）在低于玻璃化转变温度Tg = 576K的566和573K等温退火。用差示扫描量热法（DSC）和电阻法研究了松弛过程。然后，从电阻率和样品的几何形状准确地估计了块体玻璃的电阻率。虽然DSC吸收峰出现在玻璃化转变后，随着松弛的进展而变大，但在566 K下退火6 × 103 s或在573 K下退火6 × 102 s后，生长终止，这意味着自由体积含量达到恒定值，达到完全松弛状态。在566 K弛豫过程中，室温剩余电阻率p（300）也发生了相应的变化。然后，p（300）在最初的6 x 10 3 s内随时间增加，在随后的6 x 10 4 s内保持不变。
The structural relaxation process was investigated for a Pd 4 2 . 5 Cu 3 0 Ni 7 . 5 P 2 0 metallic glass (bulk and ribbon samples) isothermally annealed at 566 and 573 K just below glass transition temperature T g = 576 K. The relaxation process was examined by differential scanning calorimetry (DSC) and electrical resistmetry. Then, the resistivity of bulk glass was exactly estimated from the resistance and the geometry of the sample. Although the DSC absorption peak appeared just after glass transition became larger with the progress of the relaxation, the growth was terminated after annealing for 6 x 10 3 s at 566 K or 6 x 10 2 s at 573 K, meaning that the free volume content reached a constant value and a fully relaxed state was attained. The corresponding change was also seen in the room temperature residual resistivity p(300) during relaxing at 566 K. Then, the p(300) increased with time for initial 6 x 10 3 s and was constant during further 6 x 10 4 s.