| Ni/Y2O3 nanocomposites were synthesized by a high-energy ball-milling of Ni powders with yttrium-based salts or Y2O3. The yttrium salts and oxide are completely dissolved in Ni by solid-state reaction during high-energy ball-milling at ambient temperature. Subsequent sintering resulted in the formation of various Y-Ni-O particles by reprecipitation. Y2O3 particles formed after sintering at 1100 °C in the case of Y- acetate and Y2O3, whereas NixY or Ni-O-Y particles formed when using Y-chloride or Y-carbonate as starting materials. In the former cases, the sintered materials have relatively uniform microstructures where fine Y2O3 particles are homogeneously distributed in the Ni matrix. |
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