Abstract
Recrystallization through the liquid phase plays an important role in sintering, since it brings about changes in the structure, phase composition, and size (shrinkage) of compacts. Up to now the process has been examined in greatest detail in investigations into the liquid-phase reactive sintering of hard metals and refractory compounds. Its kinetics is described in [i, 2], where it is shown that the driving force in the sintering of a system is a fall, brought about by the formation of a new phase, in the latter 's isobaric-isothermal potential. During the liquid-phase sintering of a mixture of silicon, silicon carbide, and carbon, the formation of the end product and production of a nonporous solid are linked with reactive diffusion on the carbon/melt interface in the system and also with dissolution of solid phases in liquid silicon and crystallization of secondary silicon carbide.
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