Accession Number : ADP011866


Title :   The Influence of Mechanical Stress on the Growth of Crystals


Descriptive Note : Conference proceedings


Corporate Author : STRATHCLYDE UNIV GLASGOW (UNITED KINGDOM) DEPT OF PURE AND APPLIED CHEMISTRY


Personal Author(s) : Sherwood, John N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/p011866.pdf


Report Date : Jan 2001


Pagination or Media Count : 9


Abstract : A review is presented of the author's recent work on the influence of mechanical stress on the growth rate of materials. On the basis of the results, it is proposed that growth rate dispersion of secondary nuclei arises as a result of competition between stress reduction and dislocation enhancement of growth rates in the developing particles, with the former being the major influence at low particle sizes. The results are shown to account for the particle size and material dependence of the dispersion. Mechanistic studies suggest that the principal mechanism of stress reduction in growth rate is the influence of the applied stress on the surface free energy of the crystal. This effects both nucleation at the growth centre and the migration of growth steps across the crystal surface.


Descriptors :   *STRESSES , *MECHANICAL PROPERTIES , *CRYSTAL GROWTH , PARTICLE SIZE , SYMPOSIA , OPTIMIZATION , DISPERSING , COMPOSITE MATERIALS , CRYSTAL LATTICES , NUCLEATION , REDUCTION , DISLOCATIONS , FREE ENERGY , SURFACE ENERGY , SCOTLAND


Subject Categories : Crystallography


Distribution Statement : APPROVED FOR PUBLIC RELEASE