Formation of a Layered Structure on SiC-Al2O3-ZrO2 Ceramics during High-Temperature Oxidation

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

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, 2013, #01/02
http://www.materials.kiev.ua/article/913

Abstract

The high-temperature oxidation of SiC-Al2O3-ZrO2 composite material in air under the action of concentrated solar radiation at temperature close to the melting point leads to the formation of a three-layer wear- and corrosion-resistant protective scale with an outer layer of Al2SiO5 aluminum silicate about 180 µm in depth with fine fibrous structure. It is shown that preliminary high-temperature oxidation of the composite improves its service characteristics.


CONCENTRATED SOLAR RADIATION, LAMELLAR STRUCTURE, PRELIMINARY HIGH-TEMPERATURE OXIDATION, SERVICE CHARACTERISTICS OF COMPOSITES, SIC–AL2O3–ZRO2 COMPOSITE CERAMICS