| abstract |
An object of the present invention is to provide a composite material having a very small thermal expansion coefficient difference with alumina and sufficiently high thermal conductivity, compactness and strength. The dense composite material of the present invention contains 37% by mass to 60% by mass of silicon carbide particles, contains titanium silicide, titanium silicon carbide and titanium carbide in a smaller amount than mass% of the silicon carbide particles, respectively, and has an open porosity of 1 It is% or less. Characteristics of such a dense composite material are, for example, an average linear thermal expansion coefficient of 7.2 ppm / K to 8.2 ppm / K at 40 ° C to 570 ° C, a thermal conductivity of at least 75 W / mK, and a four-point bending strength of at least 200 MPa. |