The influence of carbon on the microstructure and mechanical properties of sintered boron carbide

摘要: Abstract It was found that boron carbide can be sintered pressureless to ultrafine-grained bodies with densities of more than 95% the theoretical density B 4 C, if small additions carbon are made powders submicron particle size and compacts heated in inert atmospheres temperatures near 2150 °C. In particular acts as an inhibitor surface-to-surface matter transport so densification via grain boundary and/or lattice diffusion is enhanced at lower sintering temperatures. The mechanical properties this new material summarized compared those commercial hot-pressed product.