Method for the obtaining cost effective powder
AssigneeInnomaq 21, S.L.
InventorIsaac Valls Angles
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Abstract
A production method of particulate materials, through centrifugal atomization (CA) is disclosed. The method is suitable for obtaining fine spherical powders with exceptional morphological quality and extremely low content, or even absence, of nonspherical shape particles and internal voids. An appropriate cost effective method for industrial scale production of metal alloy, intermetallic, metal matrix composite or metal-like material powders in large batches is also disclosed. The atomization technique can be extended to other than the centrifugal atomization with rotating element techniques.
Claims20
A method for producing metal based alloy powders by means of centrifugal atomization in a closed chamber comprising the steps of:
- a) providing a composition comprising at least one metal,
- b) melting the composition, and
- c) atomizing the molten composition by means of centrifugal atomization with an atomizing disk;
- wherein the atmosphere in the dosed atomization chamber is pressurized and/or cooled;
- and wherein the contact angle between the molten composition and the atomizing disk is above 96° and smaller than 168°, measured using the sessile drop method.
A method for producing, metal-based alloy powders by means of centrifugal atomization in a closed chamber comprising the steps of:
- a) providing a composition comprising at least one metal,
- b) melting the composition, and
- c) atomizing the molten composition by means of centrifugal atomization with an atomizing disk;
- wherein the atmosphere in the closed atomization chamber is pressurized and/or cooled, and wherein the atmosphere in the chamber is modified by introducing a gas and/or a liquid, trapping the oxygen, changing the temperature and/or changing the pressure, so that there is an increase of surface tension between the molten composition and the atomizing disk which is at least 55 mN/m with respect to the surface tension in air.
Dependencies are inferred from the claim text.