Norimasa Nishiyama

Materials/Devices

Norimasa Nishiyama

Specially Appointed Associate Professor

Tough ceramicsSynthesis under high pressure and temperatureSynchrotron radiation

Research Projects

  • Discovery of transformation toughening by fracture-induced amorphization of the hardest oxide, nanopolycrystalline SiO2 stishovite

  • Synthesis of transparent ceramics of the third hardest material, polycrystalline cubic silicon nitride

Topics

  • “Hanging tough: Rare ceramic goes amorphous for strength”, introduction on the top page of American Ceramics Society. A paper published in Scientific Reports, “Fracture-induced amorphization of polycrystalline SiO2 stishovite: a potential platform for toughening in ceramics”

  • “High heat and pressure help researchers fabricate first samples of transparent silicon nitride”, introduction on the top page of American Ceramics Society. A paper published in Scientific Reports, “Transparent cubic silicon nitride”

2002

PhD, faculty of science, University of Tokyo

2006

BL Scientist, GSECARS, Univ. of Chicago (USA)

2007

Assistant Professor, GRC, Ehime University

2009

Assocciate Professor, GRC, Ehime University

2012

BL Manager, Photon Science, DESY (Germany)

2016-

S.A. Associate Prof., Tokyo Institute of Technology

1997

Gold medal, Ehime University

2012

N. Nishiyama et al. “Synthesis of nanopolycrystalline bulk SiO2 stishovite with very high toughness” Scripta Materilalia, 67, 955-958 (2012)

2013

N. Nishiyama et al. “Transparent nanocrystalline bulk alumina obtained at 7.7 GPa and 800°C” Scripta Materialia, 69, 362-365 (2013)

2014

N. Nishiyama et al. “Fracture-induced amorphization of polycrystalline SiO2 stishovite: a potential platform for toughening in ceramics” Scientific Reports, 4, 6558 (2014)

2015

E. Kulik, N.Nishiyama et al. “A complete solid solution with rutile-type strucuture in SiO2-GeO2 system at 12 GPa and 1600°C” J. Am Ceram Soc, 98, 4111-4116 (2015)

2017

N. Nishiyama et al. “Transparent polycrystalline cubic silicon nitride ” Scientific Reports, 7, 44755 (2017)

Masaaki Misawa et al. “Picosecond amorphization of SiO2 stishovite under tension” Science Advances Vol. 3, no. 5, e1602339 (2017)