Copper porous body, copper porous composite member, method for producing copper porous body, and method for producing copper porous composite member

Abstract

This porous copper body includes: a skeleton which is formed of a sintered body of a plurality of copper fibers and has a three-dimensional network structure, wherein the copper fibers forming the skeleton consist of copper or a copper alloy, and the copper fibers have a diameter R in a range of 0.01 mm to 1.0 mm, a ratio L/R of a length L to the diameter R in a range of 4 to 200, and a circularity of a cross section orthogonal to a length direction in a range of 0.2 to 0.9, and the porous copper body has a porosity of 50% to 95%.

1 . A porous copper body comprising:
 a skeleton which is formed of a sintered body of a plurality of copper fibers and has a three-dimensional network structure,   wherein the copper fibers forming the skeleton consist of copper or a copper alloy, and the copper fibers have a diameter R in a range of 0.01 mm to 1.0 mm, a ratio L/R of a length L to the diameter R in a range of 4 to 200, and a circularity of a cross section orthogonal to a length direction in a range of 0.2 to 0.9, and   the porous copper body has a porosity of 50% to 95%.   
     
     
         2 . A porous copper composite member comprising:
 a bonded body of a member main body and a porous copper body including a skeleton of a three-dimensional network structure,   wherein the porous copper body is the porous copper body according to  claim 1 .   
     
     
         3 . The porous copper composite member according to  claim 2 ,
 wherein a bonded surface of the member main body bonded to the porous copper body consists of copper or a copper alloy, and   a bonded portion between the porous copper body and the member main body is a sintered layer.   
     
     
         4 . A method for producing a porous copper body including a skeleton which is formed of a sintered body of a plurality of copper fibers and has a three-dimensional network structure, the method comprising:
 a copper fiber lamination step of laminating the copper fibers, wherein with regard to the copper fibers, a diameter R is in a range of 0.01 mm to 1.0 mm, a ratio L/R of a length L to the diameter R is in a range of 4 to 200, and a circularity of a cross section orthogonal to a length direction is in a range of 0.2 to 0.9; and   a sintering step of sintering the plurality of laminated copper fibers together.   
     
     
         5 . A method for producing a porous copper composite member including a bonded body of a member main body and a porous copper body including a skeleton of a three-dimensional network structure, the method comprising:
 a bonding step of bonding the porous copper body according to  claim 1  and the member main body to each other.   
     
     
         6 . The method for producing a porous copper composite member according to  claim 5 ,
 wherein a bonded surface of the member main body, to which the porous copper body is bonded, consists of copper or a copper alloy, and   in the bonding step, the porous copper body and the member main body are bonded to each other by sintering.