| abstract |
【Task】 To provide a heat sink material having improved thermal conductivity in a composite heat sink material comprising metal-coated diamond particles in a metal matrix. [Solution] The heat sink material of the present invention is manufactured through the following steps: 1. a step of obtaining coated diamond particles by forming a metal carbide layer on the entire surface of the sized diamond particles by a pyrosol method; 2. A step of intimately mixing the coated diamond particles and the matrix metal material powder to form a mixed powder, and filling the mixture into a sintering reaction vessel; 3. A step of removing oxygen by heating the mixed powder in a reducing atmosphere. 4. The reaction vessel is subjected to a heating temperature higher than the melting point of the matrix metal material and a sintering pressure of 100 MPa or more, and the metal material is melted to flow into and fill the voids between the coated diamond particles, through the metal carbide layer. A process of integrating diamond particles and a metal material. [Selection figure] None |