IBARAKI materials design diffractometer (iMATERIA)—Versatile neutron diffractometer at J-PARC

Ishigaki, Tōru; Hoshikawa, Akinori; Yonemura, Masao; Morishima, Takahiro; Kamiyama, Takashi; Oishi, Ryoko; Aizawa, Katsuo; Sakuma, Takashi; Tomota, Yō; Arai, M.; Hayashi, Makoto; Ebata, K.; Takano, Yoshihiko; Komatsuzaki, K.; Asano, Hideo; Kasao, T.

doi:10.1016/j.nima.2008.11.137

Cited by 141 publications

(77 citation statements)

References 7 publications

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“…Since the slit size of the incident beam was 20 mm × 20 mm, the sample volume was fully irradiated in the diffraction experiment. The neutron diffraction measurement was conducted at iMATERIA, 20th beamline at J-PARC MLF [5]. The texture and phase fractions were analyzed by applying the Rietveld texture analysis The neutron diffraction measurement was conducted at iMATERIA, 20th beamline at J-PARC MLF [5].…”

Section: Methodsmentioning

confidence: 99%

“…The neutron diffraction measurement was conducted at iMATERIA, 20th beamline at J-PARC MLF [5]. The texture and phase fractions were analyzed by applying the Rietveld texture analysis The neutron diffraction measurement was conducted at iMATERIA, 20th beamline at J-PARC MLF [5]. The texture and phase fractions were analyzed by applying the Rietveld texture analysis (RTA) by using Materials Analysis Using Diffraction (MAUD) software [8].…”

Section: Methodsmentioning

confidence: 99%

“…The authors have recently developed a simultaneous measurement scheme for textures and phase fraction at iMATERIA, time-of-flight (TOF)-type neutron diffractometer at the Japan Proton Accelerator Research Complex (J-PARC) Materials and Life Science Experimental Facility (MLF), Ibaraki, Japan [3][4][5][6]. This measurement can also acquire a high-resolution diffractogram, which is suitable for line profile analysis to determine the dislocation density [6].…”

Section: Quantum Beam Sci 2018 2 X For Peer Review 2 Of 12mentioning

confidence: 99%

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Strain-Induced Martensitic Transformation and Texture Evolution in Cold-Rolled Co–Cr Alloys

Onuki

Sato

Nakagawa

et al. 2018

QuBS

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Co-Cr alloys have been used in biomedical purposes such as stents and artificial hip joints. However, the difficulty of plastic deformation limits the application of the alloys. During the deformation, Co-Cr alloys often exhibit strain-induced martensitic transformation (SIMT), which is a possible reason for the low formability. The distinct increase in dislocation density in the matrix phase may also result in early fractures. Since these microstructural evolutions accompany the textural evolution, it is crucial to understand the relationship among the SIMT, the increase in dislocations, and the texture evolution. To characterize those at the same time, we conducted time-of-flight neutron diffraction experiments at iMATERIA beamline at the Japan Proton Accelerator Research Complex (J-PARC) Materials and Life Science Experimental Facility (MLF), Ibaraki, Japan. The cold-rolled sheets of Co-29Cr-6Mo (CCM) and Co-20Cr-15W-10Ni (CCWN) alloys were investigated in this study. As expected from the different stacking fault energies, the SIMT progressed more rapidly in the CCM alloy. The dislocation densities of the matrix phases of the CCM and CCWN alloys increased similarly with an increase in the rolling reduction. These results suggest that the difference in deformability between the CCM and CCWN alloys originate not from the strain hardening of the matrix phase but from the growth behaviors of the martensitic phase.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Quantum Beam Sci 2018 2 X For Peer Review 2 Of 12mentioning

confidence: 99%

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Strain-Induced Martensitic Transformation and Texture Evolution in Cold-Rolled Co–Cr Alloys

Onuki

Sato

Nakagawa

et al. 2018

QuBS

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“…Neutron diffraction measurements were performed at 295 K with IBARAKI Materials Design Diffractometer (iMATERIA) installed at the Materials and Life Science Experimental Facility (MLF) in J-PARC [15]. The diffraction intensities were collected by time of flight (TOF) method.…”

Section: Experimental Methodsmentioning

confidence: 99%

Estimation of Phonon Dispersion Relations Using Correlation Effects Among Thermal Displacements of Atoms

et al. 2015

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Neutron diffraction measurement of powder -Fe sample at 295 K was carried out at the high resolution powder diffractometer installed at Japan Proton Accelerator Research Complex (J-PARC). Crystal parameters were determined from Rietveld analysis. The correlation effects among thermal displacements of atoms were estimated from a generalized equation based on the results of fomer diffuse scattering analysis. The force constants among atoms were obtained using an equation for transforming of the correlation effects to force constants. The force constants and the crystal structure of -Fe were used to estimate the phonon dispersion relations, phonon density of states, and specific heat by computer simulation. The obtained force constants among first-nearest-neighboring atoms is 2.3 eV/Å 2 at 295 K and the specific heat is 185 meV/K at 150 K. The calculated phonon dispersion relations and specific heat of -Fe are similar to those obtained from inelastic neutron scattering and specific heat measurements, respectively.

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“…The exposure time for data collection in the 0.12-MW operation was approximately 900 s for each sample contained in a 6-mm diameter cylindrical vanadium cell. A more detailed description of the diffractometer can be found elsewhere [11]. Rietveld refinements were performed using the program Z-Rietveld ver.…”

Section: Methodsmentioning

confidence: 99%

Structural and Magnetic Properties of Dilute Spinel Ferrites: Neutron Diffractometry and Magnetometry Investigations

Mamiya¹,

Terada²,

Kitazawa³

et al. 2011

Journal of Magnetics

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Magnetic properties of highly zinc-substituted manganese ferrites are discussed on the basis of cation distribution. High throughput neutron powder diffractometry indicates that the prepared samples possess a nearly normal spinel structure, where the substitution of nonmagnetic zinc ions mainly causes the dilution of magnetic ions in the A-sublattice and consequently affects bond-randomness in the B-sublattice. On the other hand, the estimated occupancy of manganese ions in the B site indicates that random anisotropy effects due to local Jahn-Teller distortions gradually weaken with the substitution. Bulk magnetometry indicates that the substitution smears the transition from a paramagnetic phase to a soft-magnetic phase. Furthermore, at lower temperatures, such a soft-magnetic phase is destabilized and a magnetic glassy state appears. These features of the magnetic properties of dilute spinel ferrites are discussed from the viewpoint of the above-mentioned various types of disorders.

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IBARAKI materials design diffractometer (iMATERIA)—Versatile neutron diffractometer at J-PARC

Cited by 141 publications

References 7 publications

Strain-Induced Martensitic Transformation and Texture Evolution in Cold-Rolled Co–Cr Alloys

Strain-Induced Martensitic Transformation and Texture Evolution in Cold-Rolled Co–Cr Alloys

Estimation of Phonon Dispersion Relations Using Correlation Effects Among Thermal Displacements of Atoms

Structural and Magnetic Properties of Dilute Spinel Ferrites: Neutron Diffractometry and Magnetometry Investigations

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