Process for producing composite material combining a magnesium a

Coating processes – Immersion or partial immersion – Molten metal or fused salt bath

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4274442, 428608, 428614, B05D 118

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057052298

ABSTRACT:
The invention relates to a composite material combining a magnesium alloy containing zirconium with a carbon reinforcement, as well as to its production process.
According to the invention, such a composite material is prepared by the infiltration of a reinforcement formed from graphite or carbon fibres by a liquid magnesium alloy containing 0.3 to 1% by weight zirconium at a temperature of 650.degree. to 850.degree. C.
Under these conditions, on said fibres is formed a zirconium carbide layer containing magnesium in solid solution and e.g. complying with the formula ZrC.sub.x Mg.sub.y with 0.3<x<1 and 0.02<y<0.12, which leads to the wetting of the fibres by the melted magnesium and to a good adhesion between the fibres and the matrix, without any deterioration to the mechanical characteristics of the fibres.

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