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Fabrication of High-Density Nanostructured Alumina by the Combined Processes of Magnetic Pulsed Compaction (MPC) and Spark Plasma Sintering (SPS)

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Abstract:

In this study the nanostructured α-Al2O3 ceramics has been fabricated by the combined application of magnetic pulsed compaction (MPC) and spark plasma sintering (SPS), and their density and hardness properties were investigated. The α-Al2O3 prepared by the combined processes showed an increase of 8.4 % in density, approaching a value close to the theoretical density, a enhancement by 210∼400 Hv in hardness, compared to those for the ones by the MPC or static compaction method followed by a sintering treatment. Its grain size was almost equivalent to or slightly higher than the size of the starting Al2O3 powder, suggesting that the grain growth was remarkably reduced during the MPC and SPS processes.

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Periodical:

Solid State Phenomena (Volume 118)

Pages:

597-602

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.118.597

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Online since:

December 2006

Authors:

Jong Keuk Lee, Soon Jik Hong, Min Ku Lee, Chang Kyu Rhee

Keywords:

Alpha Alumina, Hardness, Magnetic Pulsed Compaction (MPC), Nanostructure, Relative Density, Spark Plasma Sintering (SPS)

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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