Porous aluminum body and manufacturing method therefor

Abstract

A porous aluminum body having high porosity and a manufacturing method therefor are provided, wherein the porous aluminum body can be manufactured by continuous manufacturing steps. In the present invention, this porous aluminum body includes a plurality of aluminum fibers connected to each other. The aluminum fibers each have a plurality of columnar protrusions formed at intervals on an outer peripheral surface of the aluminum fibers, the columnar protrusions protruding outward from the outer peripheral surface. Adjacent aluminum fibers are integrated with the aluminum fibers and the columnar protrusions.

1 . (canceled) 
     
     
         2 . (canceled) 
     
     
         3 . A method for manufacturing a porous aluminum body comprising: adhering titanium powder and/or titanium hydride powder to an outer peripheral surface of aluminum fibers to obtain a mixture and sintering the mixture at a temperature in the range of 655° C. to 665° C. in an inert gas atmosphere. 
     
     
         4 . The method for manufacturing a porous aluminum body according to  claim 3 , wherein the titanium powder and/or titanium hydride powder has a particle size of 1 to 50 μm and is added in an amount of 0.5 to 20 relative to 100 of the aluminum fibers in terms of the weight ratio. 
     
     
         5 . The method for manufacturing a porous aluminum body comprising: adding a titanium powder and/or a titanium hydride powder to a member of the group consisting of: aluminum fibers and a mixture of aluminum fibers and aluminum powder; followed by mixing to obtain a mixture; spreading the mixture on a carbon sole plate or in a carbon container in a predetermined shape; and then sintering the spread mixture. 
     
     
         6 . The method for manufacturing a porous aluminum body according to  claim 5 , further comprising adding an organic binder solution, mixing with the fibers and drying at 40° C. or less. 
     
     
         7 . The method for manufacturing a porous aluminum body according to  claim 5 , wherein the aluminum powder is mixed with the aluminum fiber in an amount of 20 to 50 mass % in terms of a mass ratio of the aluminum powder to total amount of the aluminum fiber and the aluminum powder. 
     
     
         8 . A method for manufacturing a porous aluminum body, wherein the porous aluminum body comprises a plurality of sintered fibers, and the aluminum fibers each have a plurality of columnar protrusions protruding outward from an outer peripheral surface of the aluminum fibers and are integrated with the aluminum fibers and the columnar protrusions, the aluminum fibers each having a wire diameter of 40 to 300 um and the columnar protrusions each having a smaller diameter than the aluminum fibers,
 the method comprising:   adhering titanium powder and/or titanium hydride powder to an outer peripheral surface of aluminum fibers to obtain a mixture and sintering the mixture at a temperature in the range of 655° C. to 665° C. in an inert gas atmosphere.   
     
     
         9 . The method for manufacturing a porous aluminum body according to  claim 8 , further comprising heating at a temperature range of 350 to 500° C. before sintering. 
     
     
         10 . The method for manufacturing a porous aluminum body according to  claim 8 , wherein the inert gas atmosphere is an argon atmosphere. 
     
     
         11 . The method for manufacturing a porous aluminum body according to  claim 8 , wherein the inert gas atmosphere is an argon atmosphere at a dew point of −50° C. or less. 
     
     
         12 . The method for manufacturing a porous aluminum body according to  claim 8 , wherein the inert gas atmosphere is an argon atmosphere at a dew point of −65° C. or less.