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Coarsening of Cobalt Precipitates in Copper- Cobalt Alloys

Published online by Cambridge University Press:  21 February 2011

T. Eguchi ,
Y. Tomokiyo ,
K. Oki  and
Y. Seno
T. Eguchi
Affiliation:
Department of Materials Science and Technology, Graduate School of Engineering Sciences
Y. Tomokiyo
Affiliation:
Research Laboratory of HVEM Kyushu University,
K. Oki
Affiliation:
Kasuga-shi 816
Y. Seno
Affiliation:
Fukuoka-shi 812, Japan
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Abstract

The Ostwald ripening of precipitates in Cu-Co alloys was investigated by electron microscopic observation. The variation of the mean particle radius r, and the distribution of relative particle sizes, f(r/r) , were obtained as functions of the aging time at 873K . The shape of f(r/r)was rather sharp and symmetrical around r = T in the early stage. It became broad with the aging and was similar, in the late stage, to the theoretical distribution of Ardell. It appeared that the shape of f(r/r) depends on the volume fraction but the growth rate of F scarcely depends on it. The rate of change of r was proportional to the cube root of the aging time from the early stage of aging.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 21: Symposium GREECE – Phase Transformations in Solids , 1983 , 475
Copyright
Copyright © Materials Research Society 1984

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References

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