| 摘要 |
A composite material according to the invention includes X parts by volume of boron carbide, Y parts by volume of silicon carbide, and Z parts by volume of silicon as main components, wherein 10<X<60, 20<Y<70, and 5<Z<30 are satisfied, and grains of 10 µm or more of the boron carbide and the silicon carbide are 10-50 parts by volume. According to this composite material, high specific rigidity and excellent grindability can be obtained. |
