Method for producing reinforced platinum material

Abstract

[Problems]Providing a strengthened platinum material with the use of melt-sprayed platinum alloy powder and through a simpler working process, which ensures strength of weld and is excellent in high temperature creep property. [Means for Solving the Problems]In a method for producing a strengthened platinum material, comprising the steps of: adding an organic solvent and wet-milling a platinum alloy powder obtained by melt-spray; degassing the milled platinum alloy fine powder by heating; sintering the fine powder; and forging the fine powder, wherein the method further comprises subjecting a sintered body formed by the sintering to oxidation treatment; and subjecting the sintered body to compression molding.

1 . A method for producing a strengthened platinum material, comprising the steps of: adding an organic solvent and wet-milling a platinum alloy powder obtained by melt-spray; degassing the milled platinum alloy fine powder by heating; sintering the fine powder; and forging fine powder, 
 wherein said method further comprising subjecting a sintered body formed by said sintering to oxidation treatment; and subjecting the sintered body to compression molding.    
     
     
         2 . The method for producing a strengthened platinum material according to  claim 1 , wherein said sintering is carried out so that the sintered body should have denseness of 25%-50%.  
     
     
         3 . The method for producing a strengthened platinum material according to  claim 1 , wherein said oxidation treatment is carried out at 1200-1400° C.  
     
     
         4 . The method for producing a strengthened platinum material according to  claim 1 , wherein said compression molding is carried out through hot pressing.  
     
     
         5 . The method for producing a strengthened platinum material according to  claim 4 , wherein hot pressing temperature is 20-1200° C.  
     
     
         6 . The method for producing a strengthened platinum material according to  claim 4 , wherein hot pressing pressure is 14 MPa-40 MPa.  
     
     
         7 . The method for producing a strengthened platinum material according to  claim 4 , wherein said hot pressing is carried out with a sintered body being arranged in a press die provided with a carbon sheet.  
     
     
         8 . The method for producing a strengthened platinum material according to  claim 1 , wherein said degassing is carried out by injecting said wet-milled platinum alloy fine powder into a heat resistant container provided with a carbon sheet.  
     
     
         9 . The method for producing a strengthened platinum material according to  claim 7 , wherein said carbon sheet is 0.03-0.5 mm in thickness.  
     
     
         10 . The method for producing a strengthened platinum material according to  claim 7 , wherein a carbon sheet firmly fixed to a sintered body due to hot pressing or a carbon sheet firmly fixed to an agglomeration of platinum alloy fine powder due to degassing is subjected to high-temperature heat treatment for oxidization combustion in an air atmosphere to get removed.  
     
     
         11 . The method for producing a strengthened platinum material according to  claim 1 , wherein said platinum alloy is any of Pt—Zr alloy, Pt—Rh—Zr alloy, or Pt—Au—Zr alloy.