A precipitation behavior of nano-oxide particle in Fe-5Y₂O₃ alloy powders is studied. The mechanically alloyed Fe-5Y₂O₃ powders are pressed at 750°C for 1h, 850°C for 1h and 1150°C for 1h, respectively. The results of Xray diffraction pattern analysis indicate that the Y₂O₃ diffraction peak disappear after mechanically alloying process, but Y₂O₃ and YFe₂O₄ complex oxide precipitates peak are observed in the powders pressed at 1150°C. The differential scanning calorimetry study results reveal that the formation of precipitates occur at around 1054°C. Based on the transmission electron microscopy analysis result, the oxide particles with a composition of Y-Fe-O are found in the Fe-5Y₂O₃ alloy powders pressed at 1150°C. It is thus conclude that the mechanically alloyed Fe-5Y₂O₃ powders have no precipitates and the oxide particles in the powders are formed by a high temperature heat-treatment.

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• Mechanical properties of Mo-Si-B alloys fabricated by using core-shell powder with dispersion of yttria nanoparticles
  Jong Min Byun, Su-Ryong Bang, Won June Choi, Min Sang Kim, Goo Won Noh, Young Do Kim
  Metals and Materials International.2017; 23(1): 170.     CrossRef