Paper Titles
Synthesizing Silicon Nitride Whiskers by Solvothermal and Carbothermal Methods
p.868
Texturing of Si3N4 Ceramics via Strong Magnetic Field Alignment
p.871
Fabrication of Thick Silicon Nitride Substrates by Tape Casting
p.875
Effects of Sintering Additives on Properties of Porous Silicon Nitride Ceramics Fabricated by Carbothermal Reduction
p.878
Preparation of Si3N4 Ceramics by Aligning α-Si3N4 Whiskers
p.881
Oxidation and Corrosion of Silicon Nitride at 1200°C and 1500°C
p.885
Synthesis of Rod-Like α-SiAlON by Carbothermal Reduction-Nitridation
p.888
Optimization of α-SiAlON Microstructure by Heat Treatment
p.891
Abrasive Erosion Comparison for a Ceramics and a High Chrome Cast Iron Applied in a Slurry Pump
p.894

Preparation of Si3N4 Ceramics by Aligning α-Si3N4 Whiskers

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Abstract:

In this paper, silicon nitride (Si3N4) ceramics by aligning α-Si3N4 whiskers were prepared via tape casting, hot-press sintering technique using Y2O3 and MgO as sintering additives. Aligned α-Si3N4 whiskers were realized by modifying the tape casting technique. After tape casting, Si3N4 tape with good flexibility and uniform pores can be obtained. Microstructures of the tape, green body and sintered sample were observed by SEM images. The results show α-Si3N4 whiskers in Si3N4 tape and green body were aligned preferentially along the tape casting direction. Si3N4 ceramics with aligned elongated grains are developed by hot-press sintering technique based on the reaction between Si3N4 and the sintering additives which lead to the liquid phase.

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Periodical:

Key Engineering Materials (Volumes 368-372)

Pages:

881-884

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.368-372.881

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Online since:

February 2008

Authors:

Yu Hui Bi, Jun Li, Fei Chen, Dong Ming Zhang, Qiang Shen, Lian Meng Zhang

Keywords:

Alignment, Hot-Press Sintering, Tape Casting

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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