Preparation of Fine Nb3Al Powder by Hydriding and Dehydriding of Bulk Material.

Abstract Structural changes of the intermetallic compound Nb3Al before and after hydriding and dehydriding have been investigated by X-ray diffraction, electron microscopy and thermal analysis. A fine powder of this compound with an average particle size less than 14 μm can be easily prepared by hydriding at 773 K for 86.4 × 103 s and dehydriding at 1073 K for 10.8 × 103 s.