Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-29T08:49:58.787Z Has data issue: false hasContentIssue false
  • English
  • Français

Grain Boundary Diffusivity Measurement Through Kinetic Analysis Of Discontinuous Precipitation

Published online by Cambridge University Press:  25 February 2011

I. Manna ,
J. N. Jha ,
S. K. Pabi  and
W. Gust
I. Manna
Affiliation:
Department of Metallurgical Engineering, Indian Institute of Technology, Kharagpur, W.B. 721 302, India
J. N. Jha
Affiliation:
Department of Metallurgical Engineering, Indian Institute of Technology, Kharagpur, W.B. 721 302, India
S. K. Pabi
Affiliation:
Department of Metallurgical Engineering, Indian Institute of Technology, Kharagpur, W.B. 721 302, India
W. Gust
Affiliation:
Max-Planck-Institut fur Metallforschung, Seestrasse 92, 7000 Stuttgart 1, Federal Republic of, Germany
Get access

Abstract

Discontinuous precipitation involves formation of a two phase aggregate from a supersaturated solid solution behind a migrating boundary. It is established that the solute transport occurs primarily through the migrating boundary, called the reaction front. This report presents a systematic study of discontinuous precipitation in a Zn-Ag alloy and measurement of grain boundary chemical diffusivity of Ag in Zn-Ag using a suitable analytical model for the first time. The necessary kinetic parameters were determined by optical and scanning electron microscopes. The activation energy for boundary chemical diffusion of Ag in Zn-Ag has been estimated to be 65.8 kJ/mol.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 238: Symposium Cb – Structure and Properties of Interfaces in Materials , 1991 , 517
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Williams, D.B. and Butler, E.P., Inter. Met. Rev. 26. 153 (1981).CrossRefGoogle Scholar
2. Gust, W., in Phase Transformations. Series 3, No.11, Vol.1, edited by The Inst. of Metallurgists, (The Chameleon Press, London, 1979) pp. 11/27.Google Scholar
3. Friesel, M., Manna, I. and Gust, W., Colloque de Physique 51, Cl–381 (1990).Google Scholar
4. Watanabe, R. and Koda, S., Nippon Kinzoku Gakkai-si (in Japanese) 21, 290 (1957).Google Scholar
5. Lucke, K., Z.Metalik. 52. 1 (1961).Google Scholar
6. Manna, I. and Pabi, S. K., J. Mater. Sci. Lett. 9, 854 (1990).CrossRefGoogle Scholar
7. Bogel, A. and Gust, W., Z. Metalik. 79 296 (1988).Google Scholar
8. Manna, I., Gust, W. and Predel, B., Ser. Metall. 24, 1635(1990).Google Scholar
9. Murr, L. E., Interfacial Phenomena in Metals and Alloys (Addison-Wesley, London, 1975), p. 133.Google Scholar
10. Petermann, J. and Hornbogen, E., Z.Metalik. 59. 814 (1968).Google Scholar
11. Rosolowski, J.H., Phy. Rev. 124, 1828 (1961).CrossRefGoogle Scholar
12. Bergner, D. and Lange, W., Phy. Stat. Solidi 18, 75 (1966).CrossRefGoogle Scholar