Conferences

Composite powders of the Si3N4―ZrN system for electrical application

   
О.V.Shyrokov,
   
I.Uvarova
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Electrical Contacts and Electrodes - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2018, #14
http://www.materials.kiev.ua/article/2605

Abstract

The behavior of Si3N4 + Zr reaction mixtures has been investigated in vacuum in the temperature range 700―1450 °С. The product of the solid-state interaction at a temperature of 1000 оС is disperse powder, which, during its subsequent nitriding, enables us to obtain a-Si3N4―ZrN composite material. The process of preparation of the Si3N4―ZrN nitride ceramics in the wide concentration range (11―33% (vol.) ZrN) has been studied. The spark plasma sintering has made it possible to obtain specimens with a density of above 95% of the theoretical density at a temperature of 1750 оС. This is connected with the formation of a continuous conductive three-dimensional network consisting of ZrN particles.


SILICON NITRIDE, ZIRCONIUM NITRIDE, NITRATION, SPARK-PLASMA SINTERING, VACUUM