| abstract |
Silicon carbide matrix composite material ( 1 ) comprises silicon carbide matrix ( 2 ) as a host. The silicon carbide matrix ( 2 ) comprises first silicon carbide phase ( 3 ) of 0.1 to 10 μm average crystal grain diameter and second silicon carbide phase ( 4 ) of 0.01 to 2 μm average crystal grain diameter. In interstices of silicon carbide crystal grains constituting the silicon carbide matrix ( 2 ), liberated silicon phase ( 5 ) amounting to, for example, 5 to 50 mass % based on the composite material ( 1 ) is present continuously in network form. This fine structure enables realizing high strength and high toughness of the silicon carbide composite material ( 1 ). |