Ball milled Ni-Ti powder deposited by cold spraying

A 50Ni-50Ti powder was produced by solid state synthesis via mechanical alloying from elemental Ti and Ni powders. The product was characterized using X-ray diffraction, scanning electron microscopy and optical microscopy. Cold spraying makes possible to deposit the coating of temperature sensitive materials, such as nanostructured material, without any significant change in the microstructure of feedstock. The preliminary results of this work showed that the ball milled Ni-Ti coating can be deposited by cold spraying. The coating presents a multilayer structure consisting of the alternate flattened Ni and Ti particles. (C) 2008 Elsevier B.V. All rights reserved.