Laser Post Annealing of Cold-sprayed Al–Ni Composite Coatings for Green Energy Tasks

This paper considerers the principal feasibility of using cold gas dynamic spraying with laser post treatment technique to create Al-Ni composite coatings. The prepared mixture of two powders was coated on an aluminum substrate and laser annealed. As a result the AlxNy intermetallic phases were observed in the coating. Obtained laser-annealed coatings were studied by means of optical and electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffractometry and compared with as-sprayed coatings. Effects of laser processing parameters, such as scanning speed, power and beam shape on microstructural evolution of the composite coatings were discussed and optimal regimes for laser assisted CS were determined.