Instrumented Impact Test of Ceramics

Many researches on ceramics have been reported, but no authorized method on impact test of ceramics exists at present.In the present study, the absorbed energy of partially stabilized zirconia (PSZ) and SiC is analyzed in instrumented Charpy impact test and in static three-point bend test. Moreover, the influence of stress-induced phase transformation on the toughness in PSZ is investigated.As a result, it is shown that the real fracture energy of PSZ is 57-59% of the total absorbed one and that the one of SiC is 38-56%. It is also shown that the amount of stress-induced phase transformation in Charpy impact test is more than the one in static three-point bend test. Furthermore, it is shown that a singular screwed loading is found in impact test of PSZ, which is due probably to an inertia effect and a stress-induced phase transformation.