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Title
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A weak compatibility condition for precipitation with application to the microstructure of thermoelectrics
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Author
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Abstract
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| We propose a weak condition of compatibility between phases applicable to cases exhibiting full or partial coherence and Widmanstätten microstructure. The condition is applied to the study of Sb2Te3 precipitates in a PbTe matrix in a thermoelectric alloy. The weak condition of compatibility predicts elongated precipitates lying on a cone determined by a transformation stretch tensor. Comparison of this cone with the long directions of precipitates determined by a slice-and-view method of scanning electron microscopy combined with focused ion beam sectioning shows good agreement between theory and experiment. A further study of the morphology of precipitates by the Eshelby method suggests that interfacial energy also plays a role and gives an approximate value of interfacial energy per unit area of 250 dyn cm−1. |
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Language
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English
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Source (journal)
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Acta materialia. - Oxford
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Publication
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Oxford
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2011
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ISSN
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1359-6454
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DOI
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10.1016/J.ACTAMAT.2011.06.025
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Volume/pages
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59
:15
(2011)
, p. 6124-6132
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ISI
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000294086900026
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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