[en] Ultrasonic high cycle fatigue test machine was installed. High cycle fatigue life decreased with increasing temperature. The difference of fatigue limit strength between 106 cycles and 1010 cycles was 46 MPa. Cyclic creep test machine was installed to evaluate creep-fatigue properties with holding time. Cyclic creep strength was higher than static creep strength. The fracture toughness test equipment operating at 10-6 torr and 900 .deg. C was installed. J-R fracture toughness at 500 .deg. C and air environment was the similar to J-R fracture toughness at RT and air environment for Mod. 9Cr-1Mo steel. In vacuum environment, J-R fracture toughness in vacuum environment was the similar to that in air environment for Mod. 9Cr-1Mo steel. Equipment was set up for compatibility test under helium coolant environment and assessment of material. Thicknesses of an outer oxide layer, an internal oxide layer, and a decarburized zone followed the parabolic rate law like mass change result. The oxidation rate of 950 .deg. C in helium was higher than that of air environment. Oxidation behaviors of high-purity CVD SiC and SiC/SiC composites were evaluated at 950 ∼ 1500 .deg. C in high purity He and at 850 ∼ 950 .deg. C in impurity-controlled He environments. SiC micropillars were fabricated successfully by using lithography and inductively-coupled plasma etching technique. Large number of identical SiC pillars can be fabricated