Conferences

High-temperature oxidation of composite AlN-ZrB2-ZrSi2 ceramics

V.Lavrenko,
 
V.Lavrenko,
 
A.Panasyuk,
 
I.Podchernyaeva
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2008, #01/02
http://www.materials.kiev.ua/article/699

Abstract

Peculiarities of composite powders and compact ceramics of AlN-ZrB2-ZrSi2 system with various ZrB2-ZrSi2 solid solution content high-temperature (up to 1450oС) oxidation in air are studied with differential thermal analysis, thermogravimetry, X-ray phasic and X-ray microspectral analysis and scanning electron microscopy. High corrosion resistance of mentioned hot pressed (almost nonporous) ceramics is found under up to 1350-1400oС temperatures, when sinter components (individual oxides) interact with each other, with formation of solid solutions on base of alumina, 202 High-temperature oxidation of zirconium oxide and aluminium borate compositional ceramics sintering in the presence of В203 liquid phase with self-reinforced sinter formation.


ALUMINUM NITRIDE, COMPOSITE CERAMICS, HIGH-TEMPERATURE OXIDATION, SELF-REINFORCED SCALE, ZIRCONIUM BORIDE, ZIRCONIUM SILICIDE