Forms of Presence and Contents of Light Elements in Finely Divided Nb_3Al Powders

摘要

Three batches of finely divided Nb_3Al intermetallic powders obtained by calcium hydride reduction were studied for the contents of light elements (H, O, N, C, and S). The oxygen-containing phases present in the Nb_3Al powder samples were determined. The oxygen contained in the powder was qualitatively and quantitatively divided into oxygen as a part of adsorbed water, oxygen as a part of surface organic compounds, and oxygen as a part of niobium oxides (NbO_x) and aluminum oxides (Al_2O_3).