Startseite Technik Study and development of NiAl intermetallic coating on hypo-eutectoid steel using highly activated composite granules of the Ni–Al system
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Study and development of NiAl intermetallic coating on hypo-eutectoid steel using highly activated composite granules of the Ni–Al system

  • Aamir Shahzad , Vladislav Yu. Zadorozhnyy , Mikhail D. Pavlov , Dmitri V. Semenov und Sergey D. Kaloshkin
Veröffentlicht/Copyright: 18. Dezember 2017
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 109 Heft 1

Abstract

NiAl intermetallic coating thickness of about 50 μm was fabricated on hypo-eutectoid steel by mechanical alloying using pre-activated Ni–Al composite granules as coating material. First, Ni and Al powders were mixed with the composition of Ni-50 at.% Al and mechanically activated in a planetary ball mill, until the composite granules of this powder mixture, having maximum activity (9 cm sec−1), were formed after 120 min of milling at 200 rpm. The composite granules were then taken out from the planetary ball mill just before the critical time, i. e. the time at which these granules synthesize and convert to an intermetallic NiAl compound. The highly activated composite granules of Ni–Al were then put into the vial of a vibratory ball mill with the substrate on top of the chamber. After mechanical alloying for 60 min in the vibratory ball mill, the composite granules were synthesized fully and heat was produced during the synthesis which helped producing a thick and strong adhesive coating of NiAl intermetallic on the steel substrate. The main advantage of this technique is that not only is time saved but also there is no need for any post mechanical alloying process such as annealing or laser treatment etc. to get homogeneous, strongly bonded intermetallic coatings. X-ray diffraction analysis clearly indicates the formation of NiAl phase. Micro-hardness of the coating and substrate was also measured. The cross-sectional microstructure of the composite granules and the final coating were studied by scanning electron microscopy.

Keywords: Composite granules of Ni–Al; Mechanical activation; Planetary ball milling; Coating
*Correspondence address, Aamir Shahzad, MSc Advanced Materials science, College of new materials and nano technology, NUST, Misis, Moscow, Russia, National university of science and technology, MISIS, Moscow, Russia, Leninsky prospect, Moscow, 119119, Russia, Tel.: +7 (495) 6384413, Fax: +7 (495) 6384595, E-mail:

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Received: 2017-06-17
Accepted: 2017-08-21
Published Online: 2017-12-18
Published in Print: 2018-01-09

© 2018, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. Diffusion behaviour of Pt in platinum aluminide coatings during thermal cycles
  5. Ternary Al–Mo–Y phase diagram and the new phase Al4Mo2Y
  6. Evaluation of the thixoformability of 318.1 aluminum alloy
  7. High temperature tensile behavior of Mg-2Al and Mg-6Al alloys
  8. Anisotropic thermomechanical behavior of AA6082 aluminum alloy Al–Mg–Si–Mn
  9. Significant enhancement of bond strength in the roll bonding process using Pb particles
  10. Nanoindentation characterization of Al-matrix nanocomposites produced via spark plasma sintering
  11. Study and development of NiAl intermetallic coating on hypo-eutectoid steel using highly activated composite granules of the Ni–Al system
  12. Elaboration of a triphasic calcium phosphate and silica nanocomposite for maxillary grafting and deposition on titanium implants
  13. Short Communications
  14. Microstructural effects of isothermal aging on a doped SAC solder alloy
  15. Two-stage synthesis of ultrafine powder of chromium carbide
  16. DGM News
  17. DGM News
https://doi.org/10.3139/146.111567
Schlagwörter für diesen Artikel
Composite granules of Ni–Al; Mechanical activation; Planetary ball milling; Coating

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. Diffusion behaviour of Pt in platinum aluminide coatings during thermal cycles
  5. Ternary Al–Mo–Y phase diagram and the new phase Al4Mo2Y
  6. Evaluation of the thixoformability of 318.1 aluminum alloy
  7. High temperature tensile behavior of Mg-2Al and Mg-6Al alloys
  8. Anisotropic thermomechanical behavior of AA6082 aluminum alloy Al–Mg–Si–Mn
  9. Significant enhancement of bond strength in the roll bonding process using Pb particles
  10. Nanoindentation characterization of Al-matrix nanocomposites produced via spark plasma sintering
  11. Study and development of NiAl intermetallic coating on hypo-eutectoid steel using highly activated composite granules of the Ni–Al system
  12. Elaboration of a triphasic calcium phosphate and silica nanocomposite for maxillary grafting and deposition on titanium implants
  13. Short Communications
  14. Microstructural effects of isothermal aging on a doped SAC solder alloy
  15. Two-stage synthesis of ultrafine powder of chromium carbide
  16. DGM News
  17. DGM News
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