Reaction Bonded Silicon Nitride - Silicon Carbide and SiAlON - Silicon Carbide Refractories for Aluminium Smelting

Mark Ian Jones; Ron Etzion; Jim Metson; You Zhou; Hideki Hyuga; Yuichi Yoshizawa; Kiyoshi Hirao

doi:10.4028/www.scientific.net/KEM.403.235

Paper Titles

Fabrication and Mechanical Properties of TiN Nanoparticle-Dispersed Si₃N₄ Ceramics from Si₃N₄-Nano TiO₂ Composite Particles Obtained by Mechanical Treatment
p.221

Spark Plasma Sintering of Silicon Nitride-Boron Carbide Composites
p.225

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
p.231

Reaction Bonded Silicon Nitride - Silicon Carbide and SiAlON - Silicon Carbide Refractories for Aluminium Smelting
p.235

Tribological Characteristics of Carbon Nano-Fiber Dispersed Silicon Nitride Based Composites in High-Temperature Fuel
p.239

Preparation of β SiAlON-cBN Composites by Spark Plasma Sintering
p.241

A Novel Approach for Preparing Electrically Conductive SiAlON-TiN Composites by Spark Plasma Sintering
p.243

Fabrication of AlN Ceramics Using AlN and Nano-Y₂O₃ Composite Particles Prepared by Mechanical Treatment
p.245

HomeKey Engineering MaterialsKey Engineering Materials Vol. 403Reaction Bonded Silicon Nitride - Silicon Carbide...

Reaction Bonded Silicon Nitride - Silicon Carbide and SiAlON - Silicon Carbide Refractories for Aluminium Smelting

Abstract:

The widely used Si3N4-SiC sidewall refractories for aluminum smelting cells, and β SiAlON-SiC composites that can be potentially used for this purpose, have been produced by reaction bonding and their corrosion performance assessed in simulated aluminum electrochemical cell conditions. The formation of the Si3N4 and SiAlON phases were studied by reaction bonding of silicon powders in a nitrogen atmosphere at low temperatures to promote the formation of silicon nitride, followed by a higher heating step to produce β SiAlON composites of different composition. The corrosion performance was studied in a laboratory scale aluminum electrolysis cell where samples were exposed to both liquid attack from molten salt bath and corrosive gas attack. The corrosion resistance of the samples was shown to be dependent on the composition but more importantly on the environment during corrosion, with samples in the gas phase showing higher corrosion.

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Periodical:

Key Engineering Materials (Volume 403)

Pages:

235-238

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.403.235

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Online since:

December 2008

Authors:

Mark Ian Jones, Ron Etzion, Jim Metson, You Zhou, Hideki Hyuga, Yuichi Yoshizawa, Kiyoshi Hirao

Keywords:

Aluminum Smelting, Corrosion, Silicon Carbide (SiC), ß-SiAlON

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