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Meeting Materials Science & Technology 2015
Symposium Ceramic Optical Materials
Presentation Title Spark Plasma Sintering of Transparent Ceramics and Unusual Grain Growth
Author(s) Byung-Nam Kim
On-Site Speaker (Planned) Byung-Nam Kim
Abstract Scope During spark plasma sintering of transparent ceramics, the effects of heating rate, pressure and loading schedule on the grain size are examined. When alumina is densified at low temperatures, high heating rates accelerate grain growth, though the total heating time is reduced. The accelerated grain growth may result from the generation of defects during densification. The defects may enhance the grain-boundary mobility and accelerate the grain growth rate, that is the dynamic grain growth. It is considered, therefore, that the high deformation rate at high heating rates accelerates grain growth. The accelerated grain growth also appears for high-pressure sintering. The grain size after sintering increases with the applied pressure. In addition, the loading schedule during heating also affects the deformation and the grain growth. In this study, the unusual grain growth during sintering of transparent ceramics is explained by using the concept of dynamic grain growth.
Proceedings Inclusion? Planned: MS&T all conference proceedings CD

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Cladded Single Crystal Fibers
Creation of New Material Science on Optical Ceramics
Effects of Varied Heat Treatments on Precipitation of Alumina in Astoichiometric Magnesium Aluminate Spinel
Fabrication of Transparent Magnesium Aluminate Spinel Ceramics using Two Kinds of Spinel Powder with Different Particle Sizes
Fundamental Study in the Processing of Transparent Ceramics
Highly Transparent Polycrystalline YAG Ceramics for Optical Applications
Laser Oscillation of Lu-based Oxide Ceramics by Spark Plasma Sintering
Low Absorption Spinel Windows for High Energy Lasers
NMR Spectroscopy of Paramagnetic Doped Ceramics to Determine Site Occupancy and Distribution
Novel Glass and Glass Ceramic Scintillators for Gamma-ray and Neutron Detection
Polycrystalline Transparent Yttrium Aluminum Garnet for Optical Applications
Praseodymium-doped SiAlON Red Phosphors Prepared by Polymer-derived Method
Processes and Characterizations of Ceramic Optical Fibers
Spark Plasma Sintering of Transparent Ceramics and Unusual Grain Growth
Synthesis and Processing of Transparent Ceramic Scintillators for Nuclear Radiation Detection
The Role of Scattering and Absorption on the Optical Properties of Birefringent Polycrystalline Ceramics: Modeling and Experiments
Transparent Ceramic Scintillators
Transparent Magnesium Aluminate Spinel Prepared via Microfluidization and Aqueous Slip-casting
Transparent Spinel by Microwave Sintering

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