Centre National De La Recherche Scientifique

Pierre Weinland

Jean-Marie Dubois

The invention relates to materials for coating metal alloys or metals, which materials are intended to improve the performance of said alloys or metals. These materials have a composition which corresponds to the general formula Al.sub.a Cu.sub.b Fe.sub.c X.sub.d I.sub.e, wherein X represents one or more elements chosen from V, Mo, Ti, Zr, Nb, Cr, Mn, Ru, Rh, Ni, Mg, W, Si and the rare earths, and I represents the inevitable manufacturing impurities, e.ltoreq.2, 14.ltoreq.b.ltoreq.30, 7.ltoreq.c.ltoreq.20, O.ltoreq.d.ltoreq.10, with c+d.ltoreq.10 and a+b+c+d+e=100% of the number of atoms, and they contain at least 40% by mass of an icosahedral quasi-crystalline phase and/or a decagonal quasi-crystalline phase and have a grain size greater than 1,000 nm in the quasi-crystalline phase. These materials are useful, in particular, for coating copper, aluminium alloys or copper alloys in the manufacture of cooking utensils, anti-friction bearings, anti-wear surfaces and reference surfaces.

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Houdemont, France

Pierre Weinland