V. Tikare et Jd. Cawley, NUMERICAL-SIMULATION OF GRAIN-GROWTH IN LIQUID-PHASE SINTERED MATERIALS - I - MODEL, Acta materialia, 46(4), 1998, pp. 1333-1342
Citations number
37
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
The simulation technique based on the Potts model, originally applied
to microstructural coarsening by Srolovitz et al. [Scripta metall., 19
83, 17, 241] has been extended to study grain growth by Ostwald ripeni
ng in liquid phase sintered materials. The model, which makes no assum
ptions about solid fractions, grain shapes or diffusion fields around
grains, has been developed and characterized in this investigation. A
two-dimensional, square lattice is used to digitize the microstructure
. The representation of the two phases. solid grains in a liquid matri
x, were achieved by populating the lattice with a two-component, canon
ical ensemble, where the two components were designated as A and B. Gr
ain growth was driven by the reduction in interfacial free energy, whi
ch was defined by the bond energies between neighboring sites. The sol
ution-reprecipitation mechanism was simulated by allowing neighboring
sites to exchange places via the classical Metropolis algorithm. (C) 1
998 Acta Metallurgica Inc.