PURPOSE:To improve the hardness at room temp., the hardness and electric conductivity after holding at high temp. by uniformly dispersing a prescribed percentage of TiB2 of a prescribed particle size in a matrix of a solid soln. of Ag in Cu. CONSTITUTION:A Cu-Ag-TiB2 type sintered material is obtd. by uniformly dispersing 0.5-18wt% TiB2 of =1mum particle size in a matrix of a solid soln. of Ag in Cu. The hardness of the composite reinforced sintered material at room temp., the hardness and electric conductivity after holding at high temp. are improved and the material is used as a contact point material, an electrode material or a material for a lead frame or the like.
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