Method for producing components from mmcs (metal matrix composites) using a powder that has been melt-atomised in an inert gas atmosphere

Abstract

The invention relates to a method for producing components using a powder that has been melt-atomised in an inert gas atmosphere from an aluminium or Al alloy with integrated hard materials, in particular from MMCs (metal matrix composites), reinforcing particles being added to the molten and atomised metal, in particular aluminium or an aluminium alloy, during or consecutive to the spraying process, and subsequently the powder particles being compressed by way of an SPS method in order to produce a component or a semi-finished product.

What is claimed: 
     
         1 . Method for producing components using a powder melt-atomized in an inert gas atmosphere from aluminum or Al alloy with integrated hard materials, in particular from MMCs (metal matrix composites), characterized in that reinforcing particles are added to the molten and atomized metal, in particular aluminum or aluminum alloy, during the melting process or subsequently, and the powder particles are afterwards compressed to create a component or a semi-finished material using an SPS process. 
     
     
         2 . Method from  claim 1 , wherein the metal, or aluminum, content to which the MMC particles are added, consists of a hypereutectic aluminum alloy having a silicone content of 5 to 25 percent by weight, an iron content of 2 to 10 percent by weight, a nickel content of 2 to 5 percent by weight, a manganese content of 0 to 3 percent by weight, and a magnesium content of 0 to 1 percent by weight, the remainder is aluminum. 
     
     
         3 . Method from  claim 1  or, wherein the globular MMC or hard material particles have a size of 1 to 30 μm. 
     
     
         4 . Method from  claims 1  to  3 , wherein the reinforcing particle content is 5 to 70 percent by weight. 
     
     
         5 . Method from  claims 1  to  4 , wherein further reinforcing particles, e.g. carbon short fibers are introduced into the metal during spraying or by mixing to improve further the mechanical properties of the material, or component or semi-finished material, produced in this way. 
     
     
         6 . Component, in particular brake rotor or friction ring, characterized in that it was produced using a method in accordance with one of the  claims 1  to  5 .