Objetivo The nonoxide technical ceramics of the silicon carbide and silicon nitride groups have been developed specifically for a number of high temperature applications, of which gas turbine engine components and heat exchangers provide 2 well studied examples. In these and similar applications the materials are exposed to substances, already well known in the metallurgical area, likely to cause accelerated oxidation through interaction with protective oxide films. 2 examples are sodium sulphate and vanadium pentoxide. For this reason considerable effort has been put into studying silicon nitride based materials in oxidising environments at high temperature in the presence of fluxing metal salts and oxides. Chemical stability is determined by 2 sets of factors, the thermodynamic and the kinetic, which must be examined separately.Specific aspects in the present context are : the thermodynamic stability at high temperature of a system prepared by equilibration under conditions of low oxygen potential but now exposed to a high oxygen potential; the rate at which a new state of equilibrium can be attained, initially at least at the surface of the material. Because of the importance of silicon dioxide, as the primary oxidation product for the corrosion process, this material is examined first. Ámbito científico natural scienceschemical scienceselectrochemistryelectrolysisnatural scienceschemical sciencesinorganic chemistrytransition metalsnatural sciencesphysical sciencesthermodynamicsnatural scienceschemical sciencesinorganic chemistrymetalloidsengineering and technologymaterials engineeringceramics Programa(s) FP1-STIMULATION 1C - Plan (EEC) to stimulate European scientific and technical cooperation and interchange, 1985-1988 Tema(s) Data not available Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador UNIVERSITY OF LEEDS Aportación de la UE Sin datos Dirección Woodhouse Lane LS2 9JT LEEDS Reino Unido Ver en el mapa Coste total Sin datos Participantes (2) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo BELGIAN NUCLEAR RESEARCH CENTRE Bélgica Aportación de la UE Sin datos Dirección 200,Herrmann Debrouxlaan 40-42 1160 BRUXELLES Ver en el mapa Coste total Sin datos Université de Limoges Francia Aportación de la UE Sin datos Dirección 13 rue de Genève 87065 Limoges Ver en el mapa Coste total Sin datos
