Mechanical and magnetic properties of nickel-dispersed tetragonal zirconia nanocomposites.

H. Kondo, Tohru Sekino, Y. H. Choa, T. Kusunose, T. Nakayama, M. Wada, T. Adachi, K. Niihara

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21 Citations (Scopus)

Abstract

Effects of Ni dispersions on microstructure and mechanical properties have been studied for Y2O3-stabilized tetragonal zirconia (Y-TZP)/Ni nanocomposites with Ni dispersion up to 10 vol%. Composites were successfully fabricated by reducing and hot-pressing Y-TZP/NiO powder mixtures. Fracture strength was significantly improved from 1.5 GPa for monolithic Y-TZP to 1.9 GPa for nanocomposites with a small addition of Ni (1-2 vol%). Magnetic properties of Y-TZP/Ni nanocomposites were also investigated. Magnetization curves of Y-TZP/Ni nanocomposites showed typical hysteresis loops of soft magnetic materials, whereas coercivity was much larger than that of pure Ni metal. A new function arising from magnetomechanical effects of metallic Ni is also discussed for the present nanocomposites.

Original languageEnglish
Pages (from-to)485-490
Number of pages6
JournalJ Nanosci Nanotechnol
Volume2
Issue number5
Publication statusPublished - 2002 Oct 1

ASJC Scopus subject areas

  • Medicine(all)

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