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Mechanical and Magnetic Properties of Nickel-Dispersed Tetragonal Zirconia Nanocomposites

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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.

Keywords: Magnetic Properties; Mechanical Properties; Nanocomposite; Nickel; Stress-sensing.; Tetragonal Zirconia

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2002.124

Affiliations: 1: Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan 2: Dept. of New Materials Technology, Graduate School of Industry and Business Administration, Hanyang University, 1271 Sa-1, Ansan, Kyungki Do 425-791, Korea

Publication date: October 1, 2002

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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