Effect of Crystal Shape on the Grain Growth during Liquid Phase Sintering of Ceramics
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- Effect of Crystal Shape on the Grain Growth during Liquid Phase Sintering of Ceramics
- Jo, Wook; Hwang, Nong-Moon; Kim, DOH-YEON
- Liquid phase sintering; Grain growth; Crystal shape; Surface free energy; Interface structure
- Issue Date
- Korean Ceramic Society
- JOURNAL OF THE KOREAN CERAMIC SOCIETY, v.43, no.11, pp.728 - 733
- he equilibrium or growth shape of ceramic materials is classified largely into two categories according to the thermodynamic conditions imposed. One is a polyhedral shape where the surface free energy is anisotropic, and the other a spherical shape where the surface free energy is isotropic. In the case of grains with a polyhedral shape of anisotropic surface free energy, so- called abnormal grain growth usually takes place due to a significant energy barrier for a growth unit to be attached to the crystal surface. In the case of grains with a spherical shape of isotropic surface free energy, however, normal grain growth with a uniform size distribution takes place. In this contribution, the state-of-the-art of our current understanding of the relationship between the crystal shape and the microstructure evolution during the sintering of ceramic materials in the presence of a liquid phase was discussed.
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