Pyrophoric material

C - Chemistry – Metallurgy – 06 – C

Patent

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Details

C06C 15/00 (2006.01) C23C 4/04 (2006.01) C23C 10/00 (2006.01)

Patent

CA 2725280

A pyrophoric material comprises a pyrophoric metal coated onto a wire mesh substrate. Iron and nickel are the preferred metals and a steel wire mesh is suitable. A process for making the pyrophoric material involves spraying an alloy of iron and/or nickel with aluminium onto a mesh using a high velocity oxy-fuel (HVOF) process following by leaching out at least a proportion of the aluminium by treatment with an alkaline solution. The product has application as a supported catalyst or as either an ignition medium or as a flare material in military countermeasures in which applications it is capable of burning at a high temperature.

L'invention porte sur un matériau pyrophore comprenant un métal pyrophore revêtant un substrat en mailles de fil. Le fer et le nickel sont les métaux préférés et des mailles de fil d'acier conviennent. L'invention porte également sur un procédé d'obtention dudit matériau consistant à pulvériser par procédé HVOF (oxy combustible haute vitesse) un alliage de fer et/ou de nickel et d'aluminium sur les mailles, puis à enlever par lixiviation au moins une proportion de l'aluminium par traitement par une solution alcaline. Le produit peut servir de catalyseur supporté ou soit de milieu d'allumage, soit de matériau pour fusée éclairante dans des contremesures militaires, étant capable de brûler à haute température dans ces applications.

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