| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat sink material that is a composite heat sink material obtained by including metal-coated diamond particles in a metal matrix and has improved thermal conductivity. <P>SOLUTION: A heat sink material according to the present invention is manufactured by the following steps of: (1) obtaining coated diamond particles by forming metal carbide layers on the entire surfaces of diamond particles, whose particle sizes are regulated, through a pyrosol method; (2) obtaining mixed powder by mixing the coated diamond particles and powder of a matrix metal material together at high density and loading the mixed powder into a sintering reaction vessel; (3) removing oxygen by heating the mixed powder in a reducing atmosphere; and (4) melting the metal material by placing the reaction vessel at a heating temperature equal to or higher than a melting point of the matrix metal material and a sintering pressure equal to or higher than 100 MPa, loading the metal material into gaps among the coated diamond particles by causing the metal material to flow into the gaps, and integrating the diamond particles and the metal material together through metal carbide layers. <P>COPYRIGHT: (C)2013,JPO&INPIT |
