Corrosion of technical ceramics by molten aluminium

U. Schwabe, L.R. Wolff, F.J.J. Loo, van, G. Ziegler

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Abstract

Corrosion investigations on various types of nonoxide technical ceramic materials, two types of silicon nitride (HIPRBSN and RBSN) and two types of silicon carbide (HIPSIC and SiSiC), were carried out in aluminum (Al99.99) melts. HIPRBSN showed nearly no corrosion attack under the most severe conditions (1273 K for 500 hrs). The RBSN material with relatively high open porosity and a small content of free silicon was attacked already after 48 hrs. The HIPSiC was considerably more attacked than the HIPRBSN, however it is also fairly corrosion resistant. The SiSiC material showed the poorest corrosion behaviour of the materials investigated. The results are explained in terms of thermodynamics, diffusion through the metal/ceramic interface and wetting effects.
Original languageEnglish
Title of host publicationEngineering ceramics, including bioceramics
EditorsG. With, de, R.A. Terpstra, R. Metselaar
Place of PublicationLondon
PublisherElsevier Applied Science Publishers
Pages3.522-3.526
ISBN (Print)1-85166-432-7
Publication statusPublished - 1989

Publication series

NameEuro-ceramics : European Ceramic Society conference (ECerS) : proceedings
Volume3

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