| Issue |
J. Phys. Colloques
Volume 49, Number C5, Octobre 1988
Interface Science and Engineering '87An International Conference on the Structure and Properties of Internal Interfaces |
|
|---|---|---|
| Page(s) | C5-551 - C5-556 | |
| DOI | https://doi.org/10.1051/jphyscol:1988567 | |
An International Conference on the Structure and Properties of Internal Interfaces
J. Phys. Colloques 49 (1988) C5-551-C5-556
DOI: 10.1051/jphyscol:1988567
COMMON FACTORS CONTROLLING GRAIN AND PHASE BOUNDARY ENERGY
W. LOJKOWSKI1 et H.J. FECHT21 UNIPRESS, High Pressure Research Centre, Sokolowska 27, PL-01-142 Warsaw, Poland
2 University of Wisconsin, Madison, U.S.A.
Abstract
The low energy interfaces identified recently for the case of silver-silver grain boundaries as well as gold-LiF and silver-nickel interfaces by the method of sintering of spheres to flat substrate, were analysed in a unified way. The special properties of some of those interfaces can be understood by taking into account that the following factors lead to a decrease of the interfacial energy : i. a high fraction of atoms of one crystal locked in valleys on the surface of the other crystal, ii. the locked atoms form close packed rows thus decreasing the elastic strain energy, iii. in sectors separated by the locked atomic rows both crystals surfaces are parallel to low energy planes, iv. the energy necessary to "unlock" an atom is higher than the energy of thermal vibrations.