Abstract
Niobium aluminides are expected to be potentially structural materials for ultra-high temperature applications. We have fabricated Nb-Al powder into near net shape by injection molding process. In order to improve sinterability, surface modification of Nb-Al powder was carried out using the high speed impact treatment method. We got Nb-Al powder coated by Al layer with submicron thickness using surface-active agent. Mixing Al coated Nb-Al powder with organic binder was carried out. As few flaking of Al layer was observed, it was concluded that Al layer adhered to Nb-Al particle.
