Farzin Ghadami, A. Sabour Rouh Aghdam, and Soheil Ghadami, Characterization of MCrAlY/nano-Al2O3 nanocomposite powder produced by high-energy mechanical-milling as feedstock for HVOF spraying deposition, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2113-1
Cite this article as:
Farzin Ghadami, A. Sabour Rouh Aghdam, and Soheil Ghadami, Characterization of MCrAlY/nano-Al2O3 nanocomposite powder produced by high-energy mechanical-milling as feedstock for HVOF spraying deposition, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2113-1
Research Article

Characterization of MCrAlY/nano-Al2O3 nanocomposite powder produced by high-energy mechanical-milling as feedstock for HVOF spraying deposition

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  • Received: 23 March 2020Revised: 27 May 2020Accepted: 1 June 2020Available online: 3 June 2020
  • In this study, Al2O3 nanoparticles, as well as MCrAlY/nano-Al2O3 nanocomposite powder were produced using a high-energy ball-milling process. In addition, the MCrAlY/nano-Al2O3 coating was deposited by selecting an optimum nanocomposite powder as feedstock using high-velocity oxy-fuel (HVOF) thermal spraying technique. The morphological and microstructural examinations of Al2O3 nanoparticles, as well as the commercial MCrAlY and MCrAlY/nano-Al2O3 nanocomposite powders, were investigated using X-ray diffraction (XRD) analysis, field emission scanning electron microscope (FESEM) equipped with electron dispersed spectroscopy (EDS) analysis and transmission electron microscope (TEM). The structural investigations and Williamson-Hall results demonstrated that the ball-milled Al2O3 powder after 48 h has the smallest crystallite size and the highest amount of lattice strain compared to all other as-received and ball-milled Al2O3 owing to its optimal nanocrystalline structure. Besides, in the case of developing MCrAlY/nano-Al2O3 nanocomposite powder, with increasing mechanical-milling duration, the particle size of the nanocomposite powders was decreased.
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