Affiliations: Research Reactor Institute, Kyoto University, Kupatori-cho, Sennan-gun, Osakafu 590 0494, Japan | Nuclear Physics Institute, Řež 250 68 near Prague, Czech Republic | Institute of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan | Japan Ultra-high Temperature Materials Research Center, Ubeshi, Yamaguchi-ken 755 0001, Japan | Advanced Institute of Materials Research, Sendai-shi 982-0252, Japan
Note: [] Corresponding author Address: Research Reactor Institute, Kyoto University, Kumatoricho, Sennan-gun, Osaka-fu 590 0494, Japan.
Abstract: Bragg diffraction angle analysis with a high-resolution strain diffractometer and time-of-flight analysis with backscattering powder diffractometer were complementarily applied to neutron residual strain investigations in an ultra-high temperature resistant composite of eutectic two-phase Al2O3/Y3A15O12 (YAG) single-crystal. It was found that the YAG phase was in tension and the A12O3 phase was in compression which resulted in strains ε in the range of ∼10−4 at room temperature, when the measured lattice spacings of the sintered YAG and sintered Al2O3 w ere used as the reference values of strain-free materials. Discussions are given on the methodological points of both analyses with respect to evaluation of a strain value for each phase in the two-phase single crystal materials.
Keywords: Ductile composite, Single crystals Al2OS3/YAG, High temperature resistant materials, Strain measurement: Neutron diffraction
