Abstract: A composite material and a heat dissipation part composed of the composite material are provided. More particularly, a composite material comprising a metal matrix and a structure in which thermally conductive particles are dispersed inside the metal matrix is provided, wherein: the metal matrix is composed of Cu, Ag, Al, Mg, or an alloy thereof; the thermally conductive particles include diamond or SiC; the thermally conductive particles are included at a volume ratio of 15% to 80%; in a microstructure of the composite material, the distance between the center of any one thermally conductive particle and the center of a thermally conductive particle most adjacent to the any one thermally conductive particle is 200 ?m or greater; and the any one thermally conductive particle and the thermally conductive particle most adjacent thereto are not in contact with each other but have a metal matrix therebetween.

Abstract: The present invention relates to a composite material of a metal and a non-metal and a heat dissipation part composed of the composite material. More specifically, the present invention relates to a composite material including a structure in which diamond particles which have excellent thermal conductivity are dispersed in a metal matrix, and particularly, to a highly reliable composite material capable of maintaining excellent heat dissipation properties even in a use environment such as military, aviation, space, or the like to which severe thermal cycles are applied, and to a heat dissipation part including the composite material.

Abstract: A heat sink plate having a structure in which two or more kinds of materials are laminated, includes: a core layer in the thickness direction of the heat sink plate; and cover layers covering a top surface and a bottom surface of the core layer; wherein the cover layers comprise a material containing copper, wherein the core layer is formed of a matrix having a first thermal expansion coefficient and a plurality of layers extending in parallel along the thickness direction of the core layer in a lattice form in the matrix, wherein the plurality of layers are made of an alloy having a second thermal expansion coefficient.

Abstract: A heat sink plate having a structure in which two or more kinds of materials are laminated, includes: a core layer in the thickness direction of the heat sink plate; and cover layers covering a top surface and a bottom surface of the core layer; wherein the cover layers comprise a material containing copper, wherein the core layer is formed of a matrix having a first thermal expansion coefficient and a plurality of layers extending in parallel along the thickness direction of the core layer in a lattice form in the matrix, wherein the plurality of layers are made of an alloy having a second thermal expansion coefficient.

Abstract: A heat-dissipating plate comprises a core layer; and two cover layers formed by being laminated on the top and bottom face of the core layer, wherein, the core layer is composed of a composite material in which a carbon phase is composited in a Cu matrix, the cover layer is composed of a Mo—Cu alloy, and the thermal conductivity in the thickness direction of the heat-dissipating plate is at least 300 W/mK, and the thermal expansion coefficient of the heat-dissipating plate in a direction perpendicular to the thickness direction is at most 9×10-6/K.