Forms of presence and contents of light elements in finely divided Nb3Al powders

Resumo

Three batches of finely divided Nb₃Al 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 Nb₃Al 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 (Al₂O₃).