Objectif Assess the feasibility of a cartbon fibre Mg ma trix composite combining high longitudinal and good transverse properties together with a high dimensional stability, using a cost effective fabrication route, i.e. cheaper material than 'prepreg' in the form of unidirectional tows or woven tapes of coated-carbon fibres together with thin sheets of Mg alloy and consolidation in the semi-liquid state. The research programme involves: optimization of the composite processing coating of fibres and its influence on their mechanical properties microstructural and analytical examinations composite manufacture testing of the composites A processing route has been developed for carbon reinforced magnesium matrix composites. The research programme involves the following:optimisation of the composite processing by liquid hot pressing;coating of fibres and its influence on mechanical properties;microstructural studies and microanalytical studies;measurement of mechanical properties;manufacturing and testing of composite sheets.It has been demonstrated that liquid hot pressing (with moderate pressures of about 15MPa) is a viable and relatively simple process for fabricating carbon reinforced magnesium composites. Rupture strengths of 1400MPa have been obtained in tensile tests on unidirectional composites constituted of AZ61 matrix and M40J carbon fibres (volume fraction: 40%). Young's moduli close to the rule of mixture value has been measured.Microstructural and microanalytical investigations have revealed the following:a satisfactory infiltration provided the fibres are not too closely packed;no significant interface reaction zone except a slight aluminium enrichment near the fibres;the presence of a thin magnesium oxide layer at the fibre/matrix interface.A tool has been designed and fabricated in order to manufacture 300 mm x 300 mm x 1.5 mm sheets in industrial conditions.THE RESEARCH PROGRAMME ENVISAGES THE FOLLOWING ASPECTS: - COATING OF FIBRES AND ITS INFLUENCE ON THEIR MECHANICAL PROPERTIES - OPTIMISATION OF THE COMPOSITE PROCESSING - COMPOSITE MANUFACTURE - TESTING OF THE COMPOSITES THE PROPOSED FABRICATION ROUTE (PRESSING IN THE SEMI-LIQUID STATE) ALLOWS TO START FROM AVAILABLE AND RELATIVELY LOW COST RAW MATERIALS, IE THIN SELECTS OF MG ALLOYS AND UNIDIRECTIONAL TOWS OR WOVEN TAPES OF C FIBRES. Champ scientifique engineering and technologymaterials engineeringcompositesnatural scienceschemical sciencesinorganic chemistryalkaline earth metalsnatural scienceschemical sciencesinorganic chemistrypost-transition metalsengineering and technologymaterials engineeringcoating and films Programme(s) FP1-EURAM - Research programme (EEC) on materials (raw materials and advanced materials) - Advanced materials (EURAM) -, 1986-1989 Thème(s) Data not available Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur Office National d'Études et de Recherches Aérospatiales (ONERA) Contribution de l’UE Aucune donnée Adresse 29 avenue de la Division Leclerc 92322 Châtillon France Voir sur la carte Coût total Aucune donnée Participants (2) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire AEROSPATIALE France Contribution de l’UE Aucune donnée Adresse 78133 LES MUREAUX Voir sur la carte Coût total Aucune donnée Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt eV Allemagne Contribution de l’UE Aucune donnée Adresse Linder Höhe 51147 Köln Voir sur la carte Coût total Aucune donnée