Method for manufacturing the metal coated amorphous powder

Abstract

A metal-coated amorphous powder having high toughness and plasticity is made by uniformly coating nano size metal on a powder surface through spray drying. The amorphous powder is added to a metallic salt solution and mixed. After mixing, the solution is spray dried. As the dried powder is heated, the salt is eliminated successively or at the same time to be reduced. The metal is a salt of any one of Cu, Nickel, Iron and Cobalt.

1 . A method of manufacturing amorphous powder comprising the steps of mixing metal salt solution with amorphous powder to prepare a mixture solution; spray-drying said mixture solution to obtain dried powder; and heating said dried powder to eliminate salt therefrom and to simultaneously be reduced.  
   
   
       2 . The method according to  claim 1 , wherein said metal salt solution comprise any one of Cu, Ni, Fe and Co.  
   
   
       3 . The method according to  claim 2 , wherein said metal salt solution contains an element selected from the group consisting of 30% wt or less of Cu, Ni, Fe and Co.  
   
   
       4 . The method according to  claim 1 , wherein ammonium hydroxide or caustic potash is added as an auxiliary substance after adding the amorphous powder to the metal salt solution in said mixing step.  
   
   
       5 . The method according to  claim 4 , wherein said auxiliary substance of 10 moles or less is added to the metal salt solution.  
   
   
       6 . The method according to  claim 1 , wherein said dried powder is heated to eliminate the salt therefrom, and then the reduction of the powder is carried out.