Abstract

The effect on sintering of two such basic geometric parameters of a powder body as pore size distribution and the magnitude of the interphase specific surface is demonstrated. Nonuniform pore size distribution is the basis of the phenomenon of local volumetric shrinkage during sintering. The amount of interphase surface affects volumetric shrinkage and alloy formation. It is suggested that sintering is a two-stage process. The first stage is sintering of unbound powder system, and the second is sintering of a bound porous body.

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