Possible explanations of transient neck formation between pairs of100 faceted particles

TitlePossible explanations of transient neck formation between pairs of100 faceted particles
Publication TypeJournal Article
Year of Publication1996
AuthorsSearcy, AW, Bullard, JW, Carter, WCraig
JournalJournal of the American Ceramic Society
Volume79
Issue9
Pagination2443 - 2451
Date Published1996/09//
Abstract

Rankin and Boatner have observed that {100} faceted MgO particles in contact along either corners or edges developed, on heating, necks that initially grew, but then shrank and broke, General thermodynamic models are provided that predict this transient neck formation for any cubic particles that share only a small fraction of an edge and for particles that share an edge that is less than 0.6 times as long as the orthogonal edges, A third model, which assumes that reaction of MgO particles with their carbon substrate removes MgO from the MgO-carbon interface at a constant rate, explains the observation that the neck shrinkage rate greatly exceeds the neck growth rate, Application of the theory to explaining the seeming prevalence of rounded surfaces in sintering powders is described.