Preparation of β SiAlON-cBN Composites by Spark Plasma Sintering

Mikinori Hotta; Takashi Goto

doi:10.4028/www.scientific.net/KEM.403.241

Paper Titles

In Situ Synthesis and Mechanical Properties of TiN-Si₂N₂O-Si₃N₄ Composites
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Dispersion of Carbon Nanotubes in Polysilazanes for the Preparation of Reinforced Si-C-N Composites
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Reaction Bonded Silicon Nitride - Silicon Carbide and SiAlON - Silicon Carbide Refractories for Aluminium Smelting
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Tribological Characteristics of Carbon Nano-Fiber Dispersed Silicon Nitride Based Composites in High-Temperature Fuel
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Preparation of β SiAlON-cBN Composites by Spark Plasma Sintering
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A Novel Approach for Preparing Electrically Conductive SiAlON-TiN Composites by Spark Plasma Sintering
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Fabrication of AlN Ceramics Using AlN and Nano-Y₂O₃ Composite Particles Prepared by Mechanical Treatment
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Preparation of Precursors for Aluminum Nitride-Based Ceramic Composites from Cage-Type and Cyclic Building Blocks
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Pressureless Melt Infiltrated Non-Oxide Ceramic-Metal Composites
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 403Preparation of β SiAlON-cBN Composites by Spark...

Preparation of β SiAlON-cBN Composites by Spark Plasma Sintering

Abstract:

SiAlON-cubic boron nitride (cBN) composite was prepared by spark plasma sintering (SPS) using -SiAlON and cBN powders as starting materials, and the effect of holding time on densification, phase transformation and hardness of the composite was investigated. The SiAlON-cBN composite containing 20 vol% cBN sintered at 1650oC for 60s was densified to >97% of theoretical density. cBN phase transformed to hexagonal boron nitride (hBN) in the SiAlON-cBN composite with increasing holding time at 1650oC. Vickers hardness of the SiAlON-20vol%cBN composite sintered at 1650oC for 60-300s was 17.7GPa, and the hardness decreased with increasing holding time.

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Periodical:

Key Engineering Materials (Volume 403)

Pages:

241-242

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.403.241

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Online since:

December 2008

Authors:

Mikinori Hotta, Takashi Goto

Keywords:

Cubic Boron Nitride (CBN), Hardness, Holding Time, Phase Transformation, Spark Plasma Sintering (SPS), ß-SiAlON

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References

[1] T. Ekstrom and M. Nygren: J. Am. Ceram. Soc., Vol. 75 (1992), p.259.

Google Scholar

[2] R. H. Wentorf, R. C. DeVries and F. P. Bundy: Science, Vol. 208 (1980), p.873.

Google Scholar

[3] F. P. Bundy and R. H. Wentorf: J. Chem. Phys., Vol. 38 (1963), p.1144.

Google Scholar

[4] M. Hotta and T. Goto: Materials Science Forum, Vol. 561-565 (2007), p.599 Fig. 1 Effect of holding time on the hardness of βSiAlON-20vol%cBN composite sintered at 1650 o C by SPS.

DOI: 10.4028/www.scientific.net/msf.561-565.599

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