Ni-Al Film Multilayered Structure Effect on Melting Threshold and Melt Thickness in Ni-Al Surface Alloy Forming Process

The synthesis of the surface Ni-Al alloy on a steel substrate is numerically studied. Surface alloys have a significant advantage over coatings since they provide the highest level of adhesion. Heat resistant alloys based on nickel-aluminum are widely used in engineering due to their low density, combination of high thermal conductivity and fracture strength at high temperatures. The application of the Ni and Al multilayer structure for the formation of the surface Ni-Al alloy by the method of liquid-phase mixing is studied. The effect of geometry parameters such as thicknesses of layers is considered. At a certain ratio of effective layer thicknesses the melting threshold of the multilayer structure is minimal.