Zohreh Yazdani, Fathallah Karimzadeh, Mohammad-Hasan Abbasi, and Abbas Amini, Characterization of NbSi2-Al2O3 nanocomposite coatings prepared with plasma spraying mechanically alloyed powders, Int. J. Miner. Metall. Mater., 22(2015), No. 7, pp. 748-754. https://doi.org/10.1007/s12613-015-1130-y
Cite this article as:
Zohreh Yazdani, Fathallah Karimzadeh, Mohammad-Hasan Abbasi, and Abbas Amini, Characterization of NbSi2-Al2O3 nanocomposite coatings prepared with plasma spraying mechanically alloyed powders, Int. J. Miner. Metall. Mater., 22(2015), No. 7, pp. 748-754. https://doi.org/10.1007/s12613-015-1130-y
Zohreh Yazdani, Fathallah Karimzadeh, Mohammad-Hasan Abbasi, and Abbas Amini, Characterization of NbSi2-Al2O3 nanocomposite coatings prepared with plasma spraying mechanically alloyed powders, Int. J. Miner. Metall. Mater., 22(2015), No. 7, pp. 748-754. https://doi.org/10.1007/s12613-015-1130-y
Citation:
Zohreh Yazdani, Fathallah Karimzadeh, Mohammad-Hasan Abbasi, and Abbas Amini, Characterization of NbSi2-Al2O3 nanocomposite coatings prepared with plasma spraying mechanically alloyed powders, Int. J. Miner. Metall. Mater., 22(2015), No. 7, pp. 748-754. https://doi.org/10.1007/s12613-015-1130-y
The present study characterized NbSi2-Al2O3 nanocomposite powders plasma-sprayed on Ti-6Al-4V substrates. The powders were agglomerated to obtain suitable particle sizes for spraying. The agglomerated powders were then plasma-sprayed using atmospheric plasma spraying. The structural transformations of the powders along with the morphological and mechanical changes of the coatings were examined by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, and hardness testing. The results showed that after plasma spraying, the grain size increased, and the lattice strain decreased. However, the grain size of this compound after spraying was still in the nanometer range. The coating was uniform and exhibited good adhesion to the substrate. The microhardness and fracture toughness of the nanocomposite coating were higher than those of a nanostructured NbSi2 coating.
The present study characterized NbSi2-Al2O3 nanocomposite powders plasma-sprayed on Ti-6Al-4V substrates. The powders were agglomerated to obtain suitable particle sizes for spraying. The agglomerated powders were then plasma-sprayed using atmospheric plasma spraying. The structural transformations of the powders along with the morphological and mechanical changes of the coatings were examined by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, and hardness testing. The results showed that after plasma spraying, the grain size increased, and the lattice strain decreased. However, the grain size of this compound after spraying was still in the nanometer range. The coating was uniform and exhibited good adhesion to the substrate. The microhardness and fracture toughness of the nanocomposite coating were higher than those of a nanostructured NbSi2 coating.
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