title: Mechanical and magnetic properties of nickel-dispersed tetragonal zirconia nanocomposites.
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.
authors.affiliation: Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Kondo
authors.forename: T
authors.initials: T
authors.lastname: Sekino
authors.forename: Y H
authors.initials: YH
authors.lastname: Choa
authors.forename: T
authors.initials: T
authors.lastname: Kusunose
authors.forename: T
authors.initials: T
authors.lastname: Nakayama
authors.forename: M
authors.initials: M
authors.lastname: Wada
authors.forename: T
authors.initials: T
authors.lastname: Adachi
authors.forename: K
authors.initials: K
authors.lastname: Niihara
mesh_terms: D019245:Compressive Strength; D003460:Crystallization / Q000379:methods*; D004548:Elasticity; D006244:Hardness; D006358:Hot Temperature; D008280:Magnetics; D008420:Manufactured Materials; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D009532:Nickel / Q000737:chemistry*; D010316:Particle Size; D011208:Powders; D011786:Quality Control; D013314:Stress, Mechanical; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry*
chemical_list: D011208:Powders; D009532:Nickel; D015040:Zirconium; C028541:zirconium oxide