Mullite admixed with SiC particle were sintered for aim to attach with crack-healing ability. The effects of the crack-healing treatment on the structural integrity and reliability of machined components were investigated. The nominal bending strength of as-received specimens and heat-treated specimens at room temperature were investigated. As the result, by using crack-healing, the bending strength of machined specimens was increased about 50%〜130%. Local fracture strength was assumed to recover completely, and the cracks formed by machining were healed completely. A large self-crack-healing ability is desirable for obtaining a higher structural integrity in ceramic components.
