With liquid-state sintering, in contrast to solid-state sintering, the system is heated until the temperature exceeds the solidus temperature of one of the components of the material system. There are three types of melting phases: limited melting of a homogeneous sintered material, formation of a phase in a heterogeneous sintered material without chemical reaction, and the formation of a melting phase by means of a chemical reaction. Factors influencing the compaction of the sintered objects are the quantity proportion of the liquid phase, the solubility of the solid in the liquid phase and the wetting of the solid by the liquid phase.
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