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  4. № 14 2018
  5. P. 31

Composite powders of the Si3N4―ZrN system for electrical application

I.Kud,
 
L.Eremenko,
 
L.Krushynska,
 
О.V.Shyrokov,
 
O.Zgalat-lozinskyi,
 
D.Zyatkevich,
 
† I.Uvarova
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka 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

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