The carbon - boron carbide sintering body, the production manner and the phase microsphere meso material null which uses

摘要

PURPOSE:To obtain the subject sintered body suitable as anti-oxidative material, neutron-absorbing material and nuclear fusing material by sintering a mixture of carbon powder, boron carbide powder, etc., at specified temp. or above. CONSTITUTION:A carbon powder of so-called mesophase small spherical particles is compounded by 50-99.9wt.% with 0.1-50wt.% boron carbide powder having 1-50mum particle size. When coaks powder is used as the carbon powder, 10-50wt.% of carbon powder, 0.1-50wt.% of boron carbide powder and 15-50wt.% of binder component (e.g. aromatic polycyclic compd.) are compounded. These source materials are mixed, formed and sintered at 2000 deg.C to obtain a carbon- boron carbide sintered body containing 3-35wt.% boron carbide and having =20 average Shore hardness, =10MPa tensile strength, =1% tensile breaking strain, =1.05 anisotropic ratio, =35W/(m.k) thermal conductivity =4.0X10-6/K coefft. of thermal expansion(CTE) (average value in the range from normal temp. to 400 deg.C).