Skip to main content

9 Result(s)

within K. MATSUNAGA Remove this filter Materials Science, general Remove this filter

and

  1. No Access

    Article

    Multilayer Analysis by Focused MeV Ion Beam

    A high-energy (MeV) helium ion beam has been focused down to l μm by a combination of piezo-driven objective slits and a magnetic quadrupole doublet. Rutherford backscattering (RBS) map** techniques using fo...

    M. Takai, A. Kinomura, M. Izumi, K. Matsunaga, K. Inoue… in MRS Online Proceedings Library (1987)

  2. No Access

    Article

    Structure and properties of Si-Ti-C-O fibre-bonded ceramic material

    Si-Ti-C-O fibre-bonded ceramic material was synthesized from pre-oxidized Si-Ti-C-O fibre with an oxide layer 400–600 nm thick, by hot-pressing at 2023 K under 50–70 MPa. The interstices in the Si-Ti-C-O fibre...

    T. Ishikawa, S. Kajii, K. Matsunaga, T. Hogami, Y. Kohtoku in Journal of Materials Science (1995)

  3. No Access

    Article

    Molecular Orbital Calculations on Atomic Structures of Si-Based Covalent Amorphous Ceramics

    We have performed ab-initio Hartree-Fock molecular orbital calculations of local atomic structures and chemical bonding states in Si-N covalent amorphous ceramics. Solute elements such as boron, carbon and oxygen...

    K. Matsunaga, H. Matsubara in MRS Online Proceedings Library (1998)

  4. No Access

    Article

    Mechanical properties of Si-T-C-O fibre-bonded ceramic using satin weave

    Tensile and compressive properties of fibre-bonded ceramic (Tyrannohex) are reported along with the relationship between fibre orientation and flexural strength. In this study, Satin-Tyrannohex was produced by...

    K. Matsunaga, T. Ishikawa, S. Kajii, T. Hogami, Y. Kohtoku in Journal of Materials Science (1999)

  5. No Access

    Article

    Cryogenic properties of Si-Ti-C-O fibre-bonded ceramic using satin weave

    Mechanical and thermophysical characteristics of Si-Ti-C-O fibre-bonded ceramic produced by hot-pressing the laminated material of oxidized satin-woven Si-Ti-C-O fibre have been investigated at room and cryoge...

    K. Matsunaga, T. Ishikawa, S. Kajii, T. Hogami in Journal of Materials Science (2001)

  6. No Access

    Article

    Notched strength of satin-woven Si-Ti-C-O fiber-bonded ceramic composite

    The fracture behavior of Si-Ti-C-O fiber-bonded ceramic composite produced by hot-pressing oxidized 8 harness-satin-woven Si-Ti-C-O fibers was investigated by using unnotched and double edge notched tensile te...

    K. Matsunaga, T. Ishikawa, S. Kajii, T. Hogami, M. Sato… in Journal of Materials Science (2002)

  7. No Access

    Article

    Stress-induced facet coarsening in a σ \(7\{4\bar{5}10\}\) symmetrical tilt grain boundary in an alumina bicrystal

    Grain boundary sliding and migration often accompany high temperature deformation in alumina, however the studies of the sliding and migration behavior of individual boundaries in bicrystals during deformation...

    S. Hanyu, H. Nishimura, K. Matsunaga, T. Yamamoto… in Journal of Materials Science (2005)

  8. No Access

    Article

    Oxygen diffusion blocking of single grain boundary in yttria-doped zirconia bicrystals

    Yttrium-doped zirconia bicrystals with [001] symmetric tilt Σ 5 grain boundaries were fabricated by a diffusion bonding technique, and oxygen diffusion behavior across the grain boundary was measured by second...

    T. Nakagawa, I. Sakaguchi, N. Shibata, K. Matsunaga… in Journal of Materials Science (2005)

  9. No Access

    Article

    Stable and metastable structures and their energetics of asymmetric tilt grain boundaries in MgO: a simulated annealing approach

    A simulated annealing (SA) method based on molecular dynamics is employed to reveal atomic structures of asymmetric tilt grain boundaries (ATGBs) in MgO. Σ5 and Σ13 ATGBs with the [001] tilt axis are systemati...

    T. Yokoi, Y. Kondo, K. Ikawa, A. Nakamura, K. Matsunaga in Journal of Materials Science (2021)