Growth of the AIN and Fe-Al Intermetallic Compound Multilayer as Different Nickel Concentration

Abstract

A great deal of research is being carried out on forming a multilayer on the material instead of single layer. However, most studies of multilayer formation have been conducted using the plasma processing or spray coating method only for surface modification. Recently, a new nitriding process has been proposed to produce an aluminum nitride on the aluminum surface by using a barrel. In addition, this study proposes a new concept on the production of a multilayer, which has an AlN and Fe-Al intermetallic compound layer, between aluminum and stainless steel by using the barrel nitriding. By forming a multilayer at the interface between the different substrates, this process can be applied to as a bonding process. The barrel nitriding was carried out at 640℃ for 10hrs with Al 2 O 3 powder and Al-Mg alloy powder. After barrel nitriding, the aluminum nitride (AlN) layer and Fe-Al intermetallic compound (Fe 2 Al 5.4) layer were formed at the interface between pure aluminum and stainless steel. In addition, the thickness of the multilayer decreased with increasing the Ni concentration of stainless steel.