摘要:
A stress of a c-axis-oriented specimen (10) of a tetragonal polycrystal is measured using X-ray diffraction under the assumption of a plane stress state. An X-ray optical system is set in the location of ϕ = 0°, 45° or 90°. An X-ray (16) diffracted at a crystal plane (the direction of the normal thereto is the direction of an angle of ψ) with the Miller indices (hk1) is detected. A diffraction angle θ in a strain state is measured in the vicinity of a Bragg's angle θ 0 in a non-strain state. Strains s with respect to a plurality of ψ are calculated from the difference between the measurement values θ and the Bragg's angle θ 0 . Specific stress calculation formulae are determined with respect to the tetragonal system having the Laue symmetry 4/mmm. The stress is calculated from the slope of the linear line of plotted measurement results.
摘要:
A novel diffraction condition simulation device for calculating a reciprocal lattice to a crystal sample and displaying, on a computer screen, a Bragg reflection condition of X rays caused by the crystal sample, characterized in that a section where a plurality of reciprocal lattice points in a limiting sphere which rotates with rotation of a crystal intersect a diffraction plane is displayed with a section of the limiting sphere on the computer screen, is provided, thereby realizing quick and easy calculation and display of a desired Bragg reflection satisfying various diffraction conditions necessary for structure analysis and characterization of structure of a crystal, without any limitation as to diffraction conditions, diffraction information and the like.
摘要:
A stress of a c-axis-oriented specimen (10) of a tetragonal polycrystal is measured using X-ray diffraction under the assumption of a plane stress state. An X-ray optical system is set in the location of φ = 0°, 45° or 90°. An X-ray (16) diffracted at a crystal plane (the direction of the normal thereto is the direction of an angle of ψ) with the Miller indices (hk1) is detected. A diffraction angle θ in a strain state is measured in the vicinity of a Bragg's angle θ 0 in a non-strain state. Strains s with respect to a plurality of ψ are calculated from the difference between the measurement values θ and the Bragg's angle θ 0 . Specific stress calculation formulae are determined with respect to the tetragonal system having the Laue symmetry 4/mmm. The stress is calculated from the slope of the linear line of plotted measurement results.
摘要:
A novel diffraction condition simulation device for calculating a reciprocal lattice to a crystal sample and displaying, on a computer screen, a Bragg reflection condition of X rays caused by the crystal sample, characterized in that a section where a plurality of reciprocal lattice points in a limiting sphere which rotates with rotation of a crystal intersect a diffraction plane is displayed with a section of the limiting sphere on the computer screen, is provided, thereby realizing quick and easy calculation and display of a desired Bragg reflection satisfying various diffraction conditions necessary for structure analysis and characterization of structure of a crystal, without any limitation as to diffraction conditions, diffraction information and the like.