Field Assisted Sintering of Nanocrystalline Titanium Nitride Powder

 
V.P.Popov,
  
L.Klochkov,
  
A.Raychenko,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2011, #03/04
http://www.materials.kiev.ua/article/1388

Abstract

The effect of field assisted sintering (FAS) on the densification of TiN ceramics is investigated using a nanosized TiN powder. Microstructural evolution at different stages of FAS processing is evaluated using electron microscopy. Coarse spherical particles (1–5 μm) are found at 700 °C. Apparently, these particles result from excessive heat on interparticle contacts when electrical current passes through agglomerates at certain stages. The specific surface area and pore size distribution in sintered samples are investigated with adsorption-structural static volumetric method. The densification and microstructural evolution are discussed in terms of electric field effects.


MICROHARDNESS, MICROSTRUCTURE, NANOCRYSTALLINE POWDER, SPARK PLASMA SINTERING, SPECIFIC PORE VOLUME, TITANIUM NITRIDE