Net shape formation of sub-micron alumina with reduced flaws by high-speed centrifugal compaction process |
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Authors: | Email author" target="_blank">Hiroyuki?Y?SuzukiEmail author Hidenori?Kuroki |
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Affiliation: | (1) Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama Higashi-Hiroshima, 739-8527 Hiroshima, Japan |
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Abstract: | A new compacting method for powder materials is presented. High-Speed Centrifugal Compaction Process (HCP) utilizes centrifugal
force of about 10,000 g for the compaction. HCP is suitable for net shape compaction of fine sub-micron and nano-powders.
HCP possesses a unique compacting mechanism that is different from other colloidal processes including Pressure Casting (PC),
and has a number of useful characteristics. HCP has a higher compacting speed than PC, wide applicability for net shape formation,
as well as a defect removing function. Because of homogeneous and flawless green microstructure, HCP alumina shows superior
sinterability and higher strength and hardness than most of other aluminas.
This article is based on a presentation made in the symposium “The 3rd KIM-JIM Joint Symposium on Advanced Powder Materials“,
held at Korea University, Seoul, Korea, October 26–27, 2001 under auspices of The Korean Institute of Metals and Materials
and The Japan Institute of Metals. |
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Keywords: | high-purity alumina centrifugal force defect removing compaction |
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