Koji Takahashi

TL;DR: In this article, Al2O3 reinforced by SiC whiskers was hot-pressed to investigate the crack-healing behavior of SiC-W. The results showed that SiC made their Al 2O3 tougher, and the surface cracks with length of 2 c = 100 μm could be healed at 1200° or 1300°C for 1 h in air.

TL;DR: In this article, a semicircular surface crack 100 μm in diameter was made on each sample, and the crack-healing behavior was systematically studied, as functions of crack healing temperature and healing time.

TL;DR: In this article, the authors investigated the bending strength at 1200°C of the crack-healed composites of an alumina reinforced by SiC whisker and determined that the threshold static and cyclic stress during crackhealing of alumina(w) has been determined to be 250 MPa and 300 MPa, respectively, while the residual stress was slightly larger than the intrinsic value.

TL;DR: In this article, a crack-healing behavior under cyclic stress of 5 Hz and resultant cyclic fatigue strength at healing temperatures of 1100° and 1200°C, were systematically investigated.

TL;DR: In this paper, a new methodology to guarantee the structural integrity of ceramic components using in situ crack-healing ability was proposed and the usefulness is discussed using the test results in terms of crackhealing behavior and proof test theory by the authors.