Sintering Kinetics Of Aluminium Oxide Ceramics With An Additive Of Eutectic Composition

Specifics of sintering of ceramics based on aluminium oxide with a eutectic additive are studied. It is shown that the sintering process proceeds in two stages: before liquid-phase formation in the system the main mechanism controlling sintering is rearrangement of the particles of the high-melting phase; after the liquid-phase formation in the system the main kinetic process is dissolution-precipitation. The main parameters controlling the kinetic process are the size of particles of the high-melting phase and the physicochemical characteristics of the eutectic melt.