抄録
Sintered boron carbide is famous for its ultimate lightness, rigidity and hardness. But boron carbide is difficult to sinter, so has been manufactured industrially by hot press only. So it is very expensive, and its shape and size are restricted to small tile or the like. In this study, new method of slip casting and pressureless sintering of boron carbide is proposed, which realize crystal structure without grain boundary layer. This new method set boron carbide ceramics free from restriction of size and shape. And boron carbide is also famous for its ability of neutron absorption or shielding. New boron carbide with free size and shape is applicable to this nuclear field, and neutron shielding design for nuclear installation has begun to be changed.
