• Title/Summary/Keyword: microstructure effect

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Particle Agglomerate Effect on Intermediate/Final Microstructure (입자 응집이 중기/말기 미구조에 미치는 영향)

  • 손영돈;전병세
    • Journal of the Korean Ceramic Society
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    • v.29 no.11
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    • pp.843-850
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    • 1992

  • The purpose of this study was to describe the heterogeneity effects on Intermediate/Final microstructure in isothermal liquid phase sintering. Several kinds of pore shapes were made by the different in the heterogeneity stress level during Intermediate/Final stage. Specimen with 48% green density especially showed that the local regions of a sintered compact were subject to more rapid shrinkage than the surroundings. This densification limiting factors generally inhibited sintering and made the large isolated crack-like pore in heterogeneous microstructures.

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Effect of Suspension Property on Granule Characteristics and Compaction Behavior of Fine Si3Na4 Powder (분산계 특성이 질화규소 미분의 과립특성 및 충진거동에 미치는 영향)

  • 이해원;오성록
    • Journal of the Korean Ceramic Society
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    • v.32 no.4
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    • pp.462-470
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    • 1995

  • The characteristics of spray-dried granules are important for dry pressing operation since they have great influences on die-filling, compaction ratio, and resulting green microstructure. An attempt was made to control granule morphology and the packing structure of fine Si3N4 particles in granules by adjusting suspension property. Mercury porosimetry was used to characterize the pore structures of both granules and green compacts. Finally, the effects of particle packing structure in granules and green microstructure on sintering behavior were investigated.

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