Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v6.i4.10
10 pages

WETTABELITY AND CORROSION OF SOME NITRIDE OR ALUMINA CERAMICS BY A Si-Ca TREATED LIQUID STEEL

A. Amadeh
Metallurgy and Materials Department, Faculty of Engineering, Tehran University P.O.Box 11365-4562, Tehran, Iran
J. C. Labbe
Faculte des Sciences et Techniques, L.M.C.T.S. - C.N.R.S. E.S.A. 6015 Universite de Limoges -123, av. Albert Thomas - 87065 LIMOGES Cedex, France
P. E. Quintard
Laboratoire de Science des Precedes Ceramiques et Traitements de Surface (S.P.C.T.S, UMR 6638 du CNRS); Institut Universitaire de Technologie du Limousin, Allee Andre Maurois F-87065 Limoges, France

ABSTRACT

The wettability and the corrosion of some AlN based or Al2O3 ceramics by a Si-Ca treated liquid steel were studied at 1550°C during one hour. All of the substrates exhibited a non-wetting behaviour. The evolution of the liquid-vapour and solid-liquid interfacial tensions and the work of adhesion show that wetting mechanism is governed by chemical interactions at the solid-liquid and liquid-vapour interfaces. The investigation of these interfaces with SEM and EDAX paint out that:
1) In the case of pure AlN, the corrosion of the substrate takes place by a decomposition of AlN and grain boundary attack.
2) In the case of an AlN-BN mixture, the corrosion is focused over the BN grains which are, from a thermodynamical point of view, less stable than AlN ones.
3) Carbon addition inhibits the corrosion of the substrate through its dissolution in the liquid phase that provides a reducing micro-atmosphere at the solid-liquid interface.
4) In the case of alumina, the corrosion is practically absent.


Articles with similar content:

TESTING OF METAL POWDERS BEHAVIOR IN A HOT STAGE MICROSCOPE
International Journal of Energetic Materials and Chemical Propulsion, Vol.5, 2002, issue 1-6
Alon Gany, Valery Rosenband
INDUSTRIAL APPLICATIONS WITH THE ATMOSPHERE AND TEMPERATURE CONTROLLED PLASMA SPRAYING PROCESS
Progress in Plasma Processing of Materials, 2001, Vol.0, 2001, issue
A. Freslon, Erick Meillot, E. Roussel, L. Bianchi
INDUSTRIAL APPLICATIONS WITH THE ATMOSPHERE AND TEMPERATURE CONTROLLED PLASMA SPRAYING PROCESS
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.5, 2001, issue 1
A. Freslon, Erick Meillot, E. Roussel, L. Bianchi
Alumina coatings from aluminium electrodeposited in molten salts
Advances in Molten Salts, Vol.0, 1998, issue
Pr. V. Hasthorpe, Ir. S. Delhaye
EXPERIMENTAL INVESTIGATION OF SURFACE HARDNESS AND DRY SLIDING WEAR BEHAVIOR OF AA7050/B4Cp
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.19, 2015, issue 3-4
P. K. Giridharan, Ranjith Rajamanickam