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Shape Transformations of Ge Precipitates in Al

Published online by Cambridge University Press:  25 February 2011

P. Lours ,
K. H. Westmacott  and
U. Dahmen
P. Lours
Affiliation:
National Center for Electron Microscopy, Materials Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, Ca 94720
K. H. Westmacott
Affiliation:
National Center for Electron Microscopy, Materials Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, Ca 94720
U. Dahmen
Affiliation:
National Center for Electron Microscopy, Materials Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, Ca 94720
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Abstract

Ge precipitates in Al-Ge alloys have been observed to undergo a transformation in shape during in-situ temperature cycling in a high voltage electron microscope. Octahedral precipitates with a parallel-cube orientation relationship spheroidized on heating and refaceted to the octahedral shape on cooling. This shape transformation was essentially conservative if the temperature excursions were kept small. These observations are discussed in terms of an interface roughening transformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 238: Symposium Cb – Structure and Properties of Interfaces in Materials , 1991 , 207
Copyright
Copyright © Materials Research Society 1992

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References

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