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Thermodynamic Predictions at Long Sintering Times and Their Relation to GPLE

Asymptotic ripening Adatom emission, diffusion, capture diffusion or interfacial control Universal CSD d as f(t). Analytical compare CSD or d with experiment to distinguish between diffusion or interfacial good for long times, sintering. Supersaturation must not be too large valid only after large process times needd  [Pg.70]

Kinetic ripening Adatom emission, diffusion, capture diffusion control numerical scheme. CSD,dasf(t) computation not elaborate large local loadings possible good for redispersion. Results depend on emission/ci rture model need initial conditions. [Pg.70]

Multiatom migration/ coalescence Crystallites of all sizes move contacting crystallites may coalesce coalescence or diffusion control. Analytical relate n and CSD shape to size-dependence, diffusion/ coalescence control. No redispersion time parameter difficult to calculate. [Pg.70]

Multiatom migration/ coalescence/ emission Crystallites of all sizes move, contacting crystallites or adatoms coalesce, crystallites and adatoms emitted diffusion or interfacial control. Reduce to KR or NMC models show effects of loading, solubility, emission, and diffusion good f( sintering or redispersion. Numerical computation elaborate multiatom emission very slow. [Pg.70]

Probability Large number of adatoms and/or crystallites random movement rules for emission, capture, diffusion. Industrially relevant processes simulatable (with adjustable parameters). Specific model required numerical computation elaborate many adjustable parameters. [Pg.70]


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