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The “Solidification” of Grain Boundaries with Increasing Temperature

Published online by Cambridge University Press:  15 February 2011

Witold Lojkowski  and
Bogdan Palosz
Witold Lojkowski
Affiliation:
High Pressure Research Center, Polish Academy of Sciences, Sokolowska 29, 01–142 Warsaw, Poland
Bogdan Palosz
Affiliation:
High Pressure Research Center, Polish Academy of Sciences, Sokolowska 29, 01–142 Warsaw, Poland
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Abstract

The aim of the paper is to explain the recently observed de-wetting grain boundary transition with increasing temperature. On the example of a bicrystal from the Fe-6at.%Si alloy, it was found recently that as temperature is increased, the following GB transitions take place: “solid” (or regular) GB-→“premelted” GB →“solid” GB. At the same time the wetting/de-wetting transitions have taken place. Another example of such GB behavior was discovered during sintering of alumina. The inverse melting behavior is explained as follows: low melting point impurities cause GB premelting at low temperatures, However de-segregation of impurities at high temperatures causes return of the GB structure to its regular “solid” state.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 357: Symposium C – Structure and Properties of Interfaces in Ceramics , 1994 , 337
Copyright
Copyright © Materials Research Society 1995

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References

1. Rabkin, E.I., Gust, W., in “Interfaces in Ceramics”, Nowotny, J. (ed.), in press.Google Scholar
2. Rabkin, E.I., Semenov, V.N., Shvindlerman, L.S., Straumal, B.B., Acta Met&Mat., 39, 627 (1991).Google Scholar
3. Rabkin, E.I., Lojkowski, W., Gust, W., Paidar, V., Interface Science, 1, 201 (1993).Google Scholar
4. Shvindlerman, L.S., Lojkowski, W., Rabkin, E.I., Straumal, B.B., Coil.de Physique, 1, p.C–629 (1990)Google Scholar
5. Bokstein, B.S., Kopetskii, V.V., Shvindlerman, L.S., “Thermodynamics and Kinetics of Grain Boundaries in Metals”, eds. Metallurgia, Moscow (1990)Google Scholar
6. Palosz, B., Boysen, H., Vogt, T., Materials Science Forum, Vols. 79–82, 665 (1991)Google Scholar