A Novel Method for Preparing Intermetallics/Superalloy Dissimilar Materials Using Current Sintering of Metallic Powders

Abstract

In this paper, a novel method is proposed to prepare the multi‐material composite component for aerospace application using the current sintering. Two representative high‐temperature structural materials, the new potential intermetallic NiAl and the widely used Ni‐based superalloy K4202, have been employed to achieve the target. As shown by the results, a clean interface with almost no defects was successfully obtained in NiAl/K4202 alloy. Nevertheless, the existence of continuous Cr(Mo) phase along the region leads to an insufficient bonding ability. To optimize the interfacial microstructure, a Ni foil is employed as the interlayer. The results indicate that the interlayer could hinder the intense diffusion of elements and prevent the abnormal growth of Cr(Mo) phases, which results in a considerable improvement of interfacial properties.This article is protected by copyright. All rights reserved.