抄録
Mechanical properties, especially high-temperature bending strength and bending creep strength, were investigated on self-healing fiber reinforced ceramics, shFRC, at elevated temperatures. shFRC consists of alumina continuous fiber bundle, Al_2O_3 matrix and SiC interlayer oriented along fiber bundle as self-healing agent. Bending strength of smoothed samples were obtained 82-120 MPa ranging at 1000-12000℃, higer than 85 MPa of ones at room temperature. Every specimens were deformed plasticaly. Bending creep was obtained over 100 h durability at 1000℃, weareas specimen was fractured for 2 h at 120℃. Both of specimen conducted high-temperature tests were broken from compressed surface at 1000℃, weareas and tensio surface at 1200℃. Different fracture mechanism would be resulted from tmeperature dependence of plasticity of Al_2O_3 matrix and leads higher bending strength than room temperature. Although bending test accomplished to evaluated the values of mechanical properties at high-temeprature, precise evaluation is expected using tensile test.
