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

E. Ayas; Alpagut Kara; Ferhat Kara

doi:10.4028/www.scientific.net/KEM.403.243

Paper Titles

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

Preparation of Precursors for Aluminum Nitride-Based Ceramic Composites from Cage-Type and Cyclic Building Blocks
p.249

Pressureless Melt Infiltrated Non-Oxide Ceramic-Metal Composites
p.251

The Oxidation Behavior of ZrB₂-Based Mixed Boride
p.253

HomeKey Engineering MaterialsKey Engineering Materials Vol. 403A Novel Approach for Preparing Electrically...

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

Abstract:

An effective approach for preparing electrically conductive SiAlON-TiN composites was developed. Granules of a designed composition of α- SiAlON was obtained by spray drying and coated with varying amounts of TiO2 powder homogenously by mechanical mixing. Fully dense composites were obtained by spark plasma sintering (SPS) under a pressure of 50 MPa at 1650°C for 5min. According to the SEM analysis, unique microstructures containing continuously segregated in-situ formed TiN phase in 3-D were achieved. Additionally, XRD studies revealed that all TiO2 was successfully converted to TiN. The resistivity of the α-β SiAlON (1x1011 .m) was drastically reduced with the addition of only 5 vol. % TiO2 (2x10-4 .m).