Estimaiton of Thermal Shock Strength for Porous Silicon Carbide

Abstract

Thermal shock fracture test using an infrared radiation heating (IRH) technique was performed on porous silicon carbide ceramics, which have various porosities (40-80vol%) and pore sizes (5-30 micrometer), for the diesel particulate filter (DPF). The thermal shock strength, R1c, of these materials were estimated experimentally, which were termed experimental R1c was measured by the IRH technique. It was possible to quantitatively evaluate the relationship between thermal shock resistance and microstructure of porous ceramics using R1c. Thermal shock strength, R1c, was decreased with the increase in porosity and pore size, and it was strongly dependent on the pore size.