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| SELF-DIFFUSION IN IRON-50% COBALT ALLOY |
| TSIEN CHIH-CHIANG;KAO SHU-CHUN;CHANG PEI-LIN Institute of Metal Research; Academia Sinica |
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Cite this article:
TSIEN CHIH-CHIANG;KAO SHU-CHUN;CHANG PEI-LIN Institute of Metal Research; Academia Sinica. SELF-DIFFUSION IN IRON-50% COBALT ALLOY. Acta Metall Sin, 1965, 8(3): 326-331.
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Abstract The self-diffusion coefficients of Fe~(55) and Co(60) in iron-50％ cobalt alloy in thetemperature range of 850-980℃ (α-region) have been measured by means of the"residual activity" method. The results are as follows: D_(Fe)= 0.26 exp(-55,600/RT) cm~2/sec, D_(Co)=14 exp(-65,000/RT) cm~2/sec. From quasi-chemical approach an approximate relationship between the activationenergies of self-diffusion in concentrated homogeneous solid solutions and those of self-diffusion and impurity diffusion in one of the components is derived as 7Q_(Fe)-3Q_(Co)=5Q_(Co)~0-Q_(Fe)~0. This relationship is found to be applicable in the Fe-50％ Co alloy (α-region).
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Received: 18 March 1965
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