Ceramics-Silikáty 63, (1) 45 - 50 (2019) |
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Nd₂O₃ DOPED YTTRIA STABILIZED ZIRCONIA CERAMICS FABRICATED BY CONVENTIONAL AND MICROWAVE SINTERING METHODS
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Muthuchamy A. 1, Nagaraju Nidhi 1, Raja Annamalai A. 2, Agrawal Dinesh K. 3
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1 School of Mechanical Engineering, VIT, Vellore.
2 Centre for Innovative Manufacturing Research, VIT, Vellore, India.
3 Material Research Institute, Pennsylvania State University, USA
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Keywords: Neodymia-doped yttria-stabilized zirconia ceramics (Nd₂O₃-doped 8mol% YSZ), Cubic zirconia, Powder metallurgy, Microwave sintering, Crystal structure, Vickers hardness, microstructure, X-ray diffraction (XRD) , Lattice parameter, Grain size
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Cubic 8 mol% yttria stabilized zirconia (8YSZ) ceramics doped with 9, 12 and 15wt% Nd₂O₃ were sintered in a single mode 2.45 GHz microwave furnace at sintering temperature of 1400°C for 20 min. and by conventional sintering at 1400°C for 5 h. The microwave sintered samples attained higher densities than the conventional processed ones. The Nd₂O₃ additions have adverse effects on densification of 8YSZ ceramics. The XRD investigations revealed that, cubic phase of 8YSZ remained stable and substitution of Zr4+ ions by larger Nd3+ ions causes an increase in the lattice parameters with Nd₂O₃ additions. Vickers hardness of 8YSZ decreased with addition of Nd₂O₃ irrespective of the sintering technique. |
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doi: 10.13168/cs.2018.0044
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