Solidification Kinetics of Silicon Nitride Suspension by Direct Coagulation Casting

Abstract

Abstract: Direct coagulation casting (DCC) is a novel-net-shape method for forming ceramic green bodies, which is based on the principle of the in-situ coagulation of a
powder suspension via a reaction-rate-controlled enzyme-catalyzed reaction after casting. Combining the rheology with the shape-forming technology of ceramic suspension,
the coagulation kinetics of silicon nitride suspension for DCC forming were investigated. The experimental results indicate that the coagulation kinetics can be successfully
studied by the dynamic relaxation experiments in terms of “coagulation time”, which provides a convenient and practicable way to research the coagulation kinetics of
ceramic suspension. After optimizing the processing conditions of the silicon nitride suspension for DCC forming, a green body with uniform, narrow and unimodal pore size distribution was prepared.

Key words: silicon nitride, direct coagulation casting, solidification kinetics

CLC Number:

O648

LIU Xue-Jian,HUANG Li-Ping,GU Hong-Chen,XU Xin,FU Xi-Ren. Solidification Kinetics of Silicon Nitride Suspension by Direct Coagulation Casting[J]. Journal of Inorganic Materials.

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Solidification Kinetics of Silicon Nitride Suspension by Direct Coagulation Casting

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