Laser post annealing of cold-sprayed Al/alumina-Ni composite coatings

Microstructures of as-sprayed and laser-annealed coatings were investigated by using optical and scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffractometry (XRD). 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.