Mechanical and magnetic properties of nickel-dispersed tetragonal zirconia nanocomposites.
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.
Kondo
H
H
Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
Sekino
T
T
Choa
Y H
YH
Kusunose
T
T
Nakayama
T
T
Wada
M
M
Adachi
T
T
Niihara
K
K
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*
D011208:Powders; D009532:Nickel; D015040:Zirconium; C028541:zirconium oxide