Cel 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. Dziedzina nauki natural scienceschemical scienceselectrochemistryelectrolysisnatural scienceschemical sciencesinorganic chemistrytransition metalsnatural sciencesphysical sciencesthermodynamicsnatural scienceschemical sciencesinorganic chemistrymetalloidsengineering and technologymaterials engineeringceramics Program(-y) FP1-STIMULATION 1C - Plan (EEC) to stimulate European scientific and technical cooperation and interchange, 1985-1988 Temat(-y) Data not available Zaproszenie do składania wniosków Data not available System finansowania CSC - Cost-sharing contracts Koordynator UNIVERSITY OF LEEDS Wkład UE Brak danych Adres Woodhouse Lane LS2 9JT LEEDS Zjednoczone Królestwo Zobacz na mapie Koszt całkowity Brak danych Uczestnicy (2) Sortuj alfabetycznie Sortuj według wkładu UE Rozwiń wszystko Zwiń wszystko BELGIAN NUCLEAR RESEARCH CENTRE Belgia Wkład UE Brak danych Adres 200,Herrmann Debrouxlaan 40-42 1160 BRUXELLES Zobacz na mapie Koszt całkowity Brak danych Université de Limoges Francja Wkład UE Brak danych Adres 13 rue de Genève 87065 Limoges Zobacz na mapie Koszt całkowity Brak danych
