| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing a metallic composite material having reduced vacancies by improving the permeability of a molten metal in a casting method according to a permeation process, and to provide a composite metallic material. <P>SOLUTION: The method for producing a composite metallic material comprises stages (a) to (c). In the stage (a), low oxygen metal grains and carbon nanofiber are mixed into an elastomer, and the mixture is dispersed by shearing force, so as to obtain a composite elastomer. In the stage (b), the composite elastomer A is heat-treated, and the elastomer contained in the composite elastomer is decomposed and vaporized, so as to obtain an intermediate material. In the stage (c), a molten metal is permeated into a space of the intermediate material within a furnace 50 in a reducing atmosphere, and is thereafter solidified, so as to obtain a composite metallic material. An oxygen content in the low oxygen metal grains is 0 to <0.3 mass%. The oxidation of the low oxygen metal grains is suppressed in the composite elastomer obtained by the stage (a). <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
