Heat and mass transport between the powder layers in graded materials obtained by the SHS method

Abstract

The laws of heat transfer and eutectic liquid mixtures redistribution between layers of bimetallic powder materials in the process of consolidation while self-propagating high temperature synthesis mode were investigated. It was determined that temperature gradients exist on both sides of the interface between layers of porous nickel and an exothermal mixture of 15% Al–85% Ni. The temperature decreased from the interface to the centers of the layers. Inhomogeneous temperature distribution was the cause of liquid phase transfer from the combustion zone (near the interface) to the cold peripheral zones of the inert powder layers. The observed laws were confirmed by the results of physical metallurgy investigation.