B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
B22F 9/04 (2006.01) B22F 1/00 (2006.01) C01B 3/00 (2006.01) C22C 1/04 (2006.01)
Patent
CA 2340403
A process is described for preparing a nanocrystalline powder of an alloy of at least two metals by an intensive mechanical grinding step performed upon powders of the metals which make up the alloy. The grinding is performed at atmospheric pressure under an inert atmosphere, and is carried out at a temperature in the range of 100-400 °C. In this manner, one obtains crystallites of the alloy having a grain size lower than 100 nm by grinding for a period of time lower by about an order of magnitude than the time necessary to achieve this grain size by a similar grinding step carried out at ambient temperature.
L'invention porte sur un procédé de préparation de poudres nanocristallines d'un alliage d'au moins deux métaux par broyage mécanique intense des poudres constitutives de l'alliage. Le broyage, qui s'effectue à la pression atmosphérique et à une température comprise entre 100 et 400 DEG C, produit des cristallites d'alliage d'une taille de grain inférieure à 100 nm. La durée du broyage nécessaire pour obtenir cette finesse de grain est inférieure d'environ un ordre de grandeur à celle d'un broyage identique s'effectuant à la température ambiante.
Boily Sabin
Huot Jacques
Rioux Reynald
Schulz Robert
Hydro-Quebec
Robic
LandOfFree
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