Production of alloys based on titanium aluminides

Abstract

In an alloy based on titanium aluminides, metal droplets are obtained from a titanium aluminide metal melt. The metal droplets are enriched with halogens resulting in halogen-enriched titanium aluminide metal droplets. The alloy is molded from the halogen-enriched titanium aluminide metal droplets by, preferably hot isostatic, pressing. Titanium aluminide powder can be heated in a container, for a predetermined period of time, wherein an atmosphere, enriched with halogens, is or will be provided in the container, so that a halogen-enriched titanium aluminide metal powder is formed, or metal droplets are formed from a titanium aluminide metal melt. The metal droplets are enriched with halogens so that halogen-enriched titanium aluminide metal droplets result. Subsequently, the alloy is molded from the halogen-enriched titanium aluminide metal droplets.

1 . A method for producing an alloy based on titanium aluminides, wherein metal droplets are obtained from a titanium aluminide metal melt using the gas atomization method, the metal droplets being enriched with halogens by exposure to a halogen-containing gas, so that halogen-enriched titanium aluminide metal droplets are formed and subsequently the alloy is molded from the halogen-enriched titanium aluminide metal droplets by, preferably hot isostatic, pressing. 
   
   
       2 . The method of  claim 1 , wherein at least one of the metal melt and the metal droplets is treated with a carrier gas, and wherein the carrier gas will be or is mixed with the halogen-containing gas. 
   
   
       3 . The method of  claim 1 , wherein a titanium aluminide metal powder is formed from the halogen-enriched metal droplets and molded into the alloy. 
   
   
       4 . The method of one of  claim 1 , wherein a component is produced from the alloy. 
   
   
       5 . A method for producing an alloy on the basis of titanium aluminides, wherein titanium-containing powder and aluminum-containing powder or powdery titanium aluminide, is milled wherein a halogen enriched atmosphere is provided during the milling process in the mill, so that a halogen enriched titanium aluminide metal powder is formed during the milling process and subsequently the powdery titanium aluminide, enriched with halogens, is molded into an alloy by, hot isostatic, pressing. 
   
   
       6 . The method of  claim 5 , wherein the atmosphere, enriched with halogens, is supplied as one of a gaseous and liquid atmosphere. 
   
   
       7 . The method of  claim 5 , wherein the atmosphere, enriched with halogens, is supplied with at least one inert gas. 
   
   
       8 . The method of  claim 5 , wherein a component is produced from the alloy. 
   
   
       9 . A method for producing an alloy based on titanium aluminides, wherein titanium aluminide powder, is heated for a predetermined time in a container, wherein an atmosphere, enriched with halogens is provided in the container, so that halogen-enriched titanium aluminide metal powder is formed during the heating time and subsequently the titanium aluminide metal powder, enriched with halogens, is molded into an alloy by, hot isostatic, pressing. 
   
   
       10 . The method of  claim 9 , wherein before the container is heated, the titanium aluminide powder is exposed to a vacuum in the container. 
   
   
       11 . The method of  claim 9 , wherein an atmosphere, enriched with halogens, is supplied with at least one inert gas, after evacuation of the container. 
   
   
       12 . The method of  claim 9 , wherein at least one of the container and the titanium aluminide powder is heated for a predetermined period of about 15 minutes to about 24 hours. 
   
   
       13 . The method of  claim 9 , wherein at least one of the container and the titanium aluminide powder is heated to a predetermined temperature between about 300° C. and about 1300° C. 
   
   
       14 . The method of  claim 9 , wherein after the container is heated, the titanium aluminide powder, is exposed to a vacuum. 
   
   
       15 . The method of  claim 9 , wherein a component is produced from the alloy.