Fabrication of Highly Electroconductive Ceramics by Spark Plasma Sintering of Si3N4-Based Particles Coated with Nanosized TiN Prepared via Chemical Route

Shiro Shimada; Shuichi Kawano

doi:10.4028/www.scientific.net/KEM.352.223

Paper Titles

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Sintering Mechanism of Fine Zirconia Powders with Alumina Added by Various Ways
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Fabrication of Highly Electroconductive Ceramics by Spark Plasma Sintering of Si₃N₄-Based Particles Coated with Nanosized TiN Prepared via Chemical Route
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Densification and Thermal Conductivity of Y₂O₃-Doped AlN Ceramics by Spark Plasma Sintering
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Thermal Conductivity Improvement by Heat-Treatment in Si₃N₄ Ceramics Using SiO₂-MgO-Y₂O₃ Additive System
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Development of Ceramic Thermoelectric Oxides for Generator
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 352Fabrication of Highly Electroconductive Ceramics...

Fabrication of Highly Electroconductive Ceramics by Spark Plasma Sintering of Si₃N₄-Based Particles Coated with Nanosized TiN Prepared via Chemical Route

Abstract:

TiO2 coating on Si3N4-based materials powders (Si3N4, α-Y-sialon, β-sialon) was accomplished by heating the powder suspension containing the precursor (1.0 vol% H2O + Ti(O-i-C3H7)4) from 15 to 40 °C. The success of homogenous coating was confirmed by TEM observation. TiO2 coated on the powder is nitrided with NH3 gas at 800 oC to TiN with uniform particle size 10–20 nm. Spark plasma sintering of composite TiN/ Si3N4-based particles at 1400 - 1600 °C yielded the composite ceramics with a relative density > 96% without sintering additives. Sintered TiN/ Si3N4-based composite ceramics containing 17.5 - 25 vol.% TiN showed a higher electrical conductivity > 103 −1 cm-1, enabling these ceramics to be suitable for electric discharge machining.

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Periodical:

Key Engineering Materials (Volume 352)

Pages:

223-226

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.352.223

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Online since:

August 2007

Authors:

Shiro Shimada, Shuichi Kawano

Keywords:

Coating, Electrical Conductivity, Nanosized, Spark Plasma Sintering (SPS), Titanium Nitride TiN

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