COLUMBIUM ALLOYS TODAY
COLUMBIUM ALLOYS TODAY Niobinm is attractive as a metal or alloy for use at high temperatures and in the fields of nuclear energy and apace travel because of its high melting point (4470DEF), good intrinsic dactility, reasonable chemical resistance, low thermal neutron capture cross section, and low density (7.9 g/cm/sup 3/). The current prices and delivery times of commercial Nb are a little lower, although still high. Progress made from 1955 to 1960 in the removal of C, O, aad N from Nb is shown. Problems commonly encountered in processing (casting) Nb alloys and teating are described; it is best to conduct high-temperature thats in vacuum. Some data are given and plotted (2000 deg F) for the effects of alloying elements (e.g., Zr, Ti, Mo, W, C, and O) on the oxidation resistance and strength of Nb. Commercially available Nb alloys are given together with laboratory and pilot alloys, and strength va. tsmperature and time plots are given for some of them. The future of Nb alloys is discussed. (D.L.C.)
Enter terms in the toolbar above to search the full text of this document for pages containing specific keywords.