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Contribution of Lattice Matching to the Interfacial Energy between Dissimilar Materials

Fecht, H. J. (1988) Contribution of Lattice Matching to the Interfacial Energy between Dissimilar Materials. Journal de Physique Colloques, 49 (C5). pp. 171-176. ISSN 0449-1947. doi:10.1051/jphyscol:1988515. https://resolver.caltech.edu/CaltechAUTHORS:20200424-093920701

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Abstract

The interfacial energy of boundaries between dissimilar materials can be described as function of the lattice mismatch, the chemical interaction and the interfacial entropy of the boundaries. Based on experiments involving a sphere-rotation method and undercooling measurements of (solid/liquid) phase mixtures in a droplet dispersion, an attempt is made to separate the influence of the different contributions. The atomic structure of interphase boundaries between noble metals and ionic crystals can be described by the "lock-in" model : low energy interphase boundaries were found if close packed rows of atoms at the "surface" of the metal crystal lock into the "valleys" between close packed rows of atoms at the "surface" of the ionic crystal. At higher temperatures the relative stability of different interphase boundary structures may change depending on the degree of axial commensuration and the related interfacial entropies. Hence, the contribution of lattice matching to the interfacial energy can decrease or vanish completely in some cases, resulting in a commensurate/incommensurate phase transition (e.g. for Au/Al2O3). Furthermore, the droplet undercooling experiments demonstrate that good matching between two crystal lattices (substrate/nucleus) can favour formation of metastable phases due to the lowering of the activation barrier for nucleation during crystallization from a highly undercooled liquid.


Item Type:Article
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URLURL TypeDescription
https://doi.org/10.1051/jphyscol:1988515DOIArticle
Additional Information:© 1988 EDP Sciences.
Issue or Number:C5
DOI:10.1051/jphyscol:1988515
Record Number:CaltechAUTHORS:20200424-093920701
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200424-093920701
Official Citation:Contribution of Lattice Matching to the Interfacial Energy between Dissimilar Materials. H. J. Fecht. J. Phys. Colloques, 49 C5 (1988) C5-171-C5-176; DOI: https://doi.org/10.1051/jphyscol:1988515
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102772
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:24 Apr 2020 17:04
Last Modified:16 Nov 2021 18:15

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