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| CRYSTALLIZATION KINETICS OF Pd(Fe,Co,Ni)_(0.05-0.15)Si_(0.17) METALLIC GLASSES |
| ZHOU Xinming (Institute of Precious Metals Research; Kunming) |
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Cite this article:
ZHOU Xinming (Institute of Precious Metals Research; Kunming). CRYSTALLIZATION KINETICS OF Pd(Fe,Co,Ni)_(0.05-0.15)Si_(0.17) METALLIC GLASSES. Acta Metall Sin, 1986, 22(1): 99-106.
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Abstract The crystallization kinetics of Pd(Fe,Co,Ni)_(0.05-0.15)Si_(0.17) and Pd_(0.84) Si_(0.16) metallic glasses has been monitored by determining the time dependence of electrical resistance during isothermal annealing below their own crystallization temperatures. It is found that the total drop of electrical resistance in the crystallization process is 10—20% generally, but the metallic glasses Pd-Fe-Si seemed to be something special and their electrical resistance was measured to be directly related to their Fe content. The electrical resistance of the metallic glasses Pd_(0.78)Fe_(0.05)Si_(0.17) increases during isothermal crystallization, yet the reason is not clear. From the viewpoint of kinetics, an addition of Fe, Co or Ni into Pd-Si system may increase their crystallization activation energy and decrease their crystallization mode coefficient, thus, makes them more stable owing to retarding the nucleation. It is believed that the stability of metallic glasses would be considered by both thermodynamic and kinetic basises other than the crystallization temperature.
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Received: 18 January 1986
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