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Your search keyword '"Kim, Doh Yeon"' showing total 6 results
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6 results on '"Kim, Doh Yeon"'

4. Effect of heating rate on the exaggerated grain growth during the sintering of Sr-hexaferrite

Author

Kim Doh-Yeon and Yoon Han-Ho

Subjects
Grain growth, Materials science, Mechanics of Materials, Mechanical Engineering, Metallurgy, food and beverages, Sintering, Liquid phase, General Materials Science, Condensed Matter Physics, Nuclear chemistry
Abstract

The sintering of Sr-hexaferrite has been carried out with slow and fast heating rates and the resultant variation of exaggerated grain growth investigated. The exaggerated grain growth was observed to occur in the presence of a liquid phase, and the fast heating resulted in a high initiation rate for exaggerated grain growth.

Published
1994
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5. Exaggerated grain growth during the sintering of YBaCuO superconducting ceramics

Author

S.J. Kwon, Z.G. Khim, Jeong In-Kwon, and Kim Doh-Yeon

Subjects
Materials science, High-temperature superconductivity, Mechanical Engineering, Metallurgy, Mineralogy, Sintering, Condensed Matter Physics, Microstructure, Grain size, law.invention, Grain growth, Mechanics of Materials, law, visual_art, visual_art.visual_art_medium, General Materials Science, Grain boundary, Ceramic, Electroceramics
Abstract

The exaggerated grain growth during sintering of YBaCuO superconducting ceramics was investigated. Due to the local presence of a small amount of liquid at 1000°C, a few grains of abnormally large size were present in the microstructure. Inside these large grains, entrapped small grains were observed.

Published
1989
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6. Temperature dependence of the shape of ZnO grains in a liquid matrix

Author

Chung Young-Keun, Cho Sang-Hee, Han Joo-Hwan, Duk N. Yoon, and Kim Doh-Yeon

Subjects
Physics::Fluid Dynamics, Ostwald ripening, Crystallography, symbols.namesake, Grain shape, Materials science, Chemical engineering, General Engineering, symbols, Liquid matrix, Dissolution, Surface energy
Abstract

The shape of ZnO grains in Bi 2 O 3 liquid solution is investigated as a function of temperature. The grains of a characteristic angular shape at low temperature become spherical with the increase of temperature. The grain shape dispersed in liquid is discussed in terms of interfacial energy minimization and growth (dissolution) rate during Ostwald ripening.

Published
1989
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