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11 Result(s)

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  1. No Access

    Article

    Study of the Crystal Structure and Phase Transition of Li2NH System

    Neutron diffraction at different temperatures has been used to study the crystal structure and possible phase transitions of Li2NH. It was found that the crystal structure and phase transition are related to the ...

    **bo Yang, J. Lamsal, Q. Cai, W. B. Yelon, W. J. James in MRS Online Proceedings Library (2008)

  2. No Access

    Article

    Structural Studies of the Superconducting La2.5Y0.5CaBa3(Cu1−xFex)7Oz (0 ≤ x ≤ 0.1) Perovskite System by Neutron Diffraction

    We have investigated the effect of Fe substitution on the structural and superconducting properties of La2.5Y0.5CaBa3(Cu1−x Fe x )7O z system b...

    M. V. Subbarao, Darshan C. Kundaliya, R. G. Kulkarni… in Journal of Superconductivity (2001)

  3. No Access

    Article

    Neutron Structural Studies of the Superconducting (Nd1−yCay)Ba2(Cu0.94Ga0.06)3Oz System

    We investigate the influence of Ca ions on the structural and superconducting properties of (Nd1−y Cay)Ba2(Cu0.94Ga0.06)3O z system by Rietveld refinement of the neutron diffrac...

    Amish G. Joshi, R. G. Kulkarni, S. K. Malik, W. B. Yelon in Journal of Superconductivity (2000)

  4. No Access

    Article

    Hydrogen Sites in the α(TiCrSiO) 1/1 Approximant Phase

    Crystal approximant phases are important because they are believed to have a similar local atomic structure to corresponding quasicrystals. Interstitial hydrogen is used as a probe of the local structures of t...

    J. Y. Kim, W. J. Kim, W. B. Yelon, P. C. Gibbons… in MRS Online Proceedings Library (1998)

  5. No Access

    Article

    Neutron and Raman Scattering Studies of Hgba2CuO4+δ

    The HgBa2CuO4+δ sample was characterized by Neutron diffraction and magnetic measurements. Both of the measurements indicate a high purity of the sample. Raman measurement was performed on a HgBa2CuO4+δ compound ...

    S. H. Liou, R. Li, Q. Cai, M. Chandrasekhar, H. Luo… in Journal of Superconductivity (1998)

  6. No Access

    Article

    Effects of Elevated Temperature Hydrogen Exposure on the Microstructure of α2- and γ-Based Titanium Aluminide Alloys

    Ti-25A1, Ti-25Al-10Nb-2V, and Ti-25Al-10Nb-3V-1Mo (at. %) α2-based alloys, and Ti-48Al and Ti-52Al γ-based alloys were exposed to gaseous hydrogen at elevated temperatures. A novel ternary hydride was observed in...

    D. S. Schwartz, R. J. Lederich, W. B. Yelon, Y.-Y. Tang… in MRS Online Proceedings Library (1992)

  7. No Access

    Article

    Rare-earth nitrides and carbides: A new class of permanent magnet materials

    The most recent and exciting development in permanent magnet research is the discovery of rare-earth nitrides and carbides with the 2:17- and l:12- type structures. Nitrogen and carbon enter the lattice inter...

    G. C. Hadjipanayis, Y. Z. Wang… in Journal of Materials Engineering and Perfo… (1992)

  8. No Access

    Article

    On the Effects of Magnetic Bonding in Rare Earth Transition Metal Intermetallics

    Neutron diffraction experiments on rare-earth transition metal magnetic alloys Er2 Fe14 B and Er 2 Fe 17 have been carried out at temperatures above and below the ordering temperature (Tc). An anomalously large m...

    R. Kumar, J. Bentley, W. B. Yelon in MRS Online Proceedings Library (1990)

  9. No Access

    Article

    On the Atomic and Magnetic Structure of Er2Fe17

    We present the results of Rietveld analysis on the neutron diffraction intensities of Er2Fe17, which crystallizes in the hexagonal Th2Ni17 phase. Of the reflection sets, h-k ≠ 3n, l = 2n+1 and l = 2n, the former ...

    R. Kumar, W. B. Yelon in MRS Online Proceedings Library (1988)

  10. No Access

    Article

    Synthesis and Structural Characterization of a Hydrated Gallosilicate Zeolite with the Nat-Framework

    Gallosilicate NAT-framework zeolites have been synthesized from Na2O:TMA2O:Ga2O3:SiO2:H2O gels and characterized by chemical analysis and powder X-ray diffraction. The structure of a hydrated material (Orthorhomb...

    D. **e, J. M. Newsam, J. Yang, W. B. Yelon in MRS Online Proceedings Library (1987)

  11. No Access

    Chapter

    Neutron Diffraction Studies of Cemented Carbide Composites

    The appreciation of cemented carbide composite materials (cermets) has become more sophisticated in recent years. The desire for cermets that yield better performance and/or that contain lower amounts of cobal...

    A. D. Krawitz, E. F. Drake, R. L. DeGroot, C. H. Vasel… in Science of Hard Materials (1983)