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- W2000109069 abstract "The aluminothermic reduction (ATR) of Nb2O5 followed by the electron beam melting (EBM) of ATR-electrodes has been successfully applied to the commercial production of pure niobium. In this work the technical viability for production of Nb–Ta alloys by the same route is discussed. We have calculated the heat balance for the ATR step for situations involving the use of either a pre-heated charge or a thermal booster substance (NaClO3). The overall effects of using over-stoichiometric Al amounts in the ATR step are discussed. Microstructural and chemical analysis results as well as values of metallic yield on the production of a Nb-20 wt% Ta alloy ingot are presented. The limits for refining Nb–Ta alloys in terms of oxygen and nitrogen by melting under high vacuum are estimated by employing the metal (Nb, Ta)-gas (N2, O2, H2O) interaction equations available in the literature." @default.
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- W2000109069 date "1999-08-01" @default.
- W2000109069 modified "2023-10-16" @default.
- W2000109069 title "Nb–Ta alloys by aluminothermic reduction of Nb2O5/Ta2O5 mixtures and electron beam melting" @default.
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- W2000109069 doi "https://doi.org/10.1016/s0263-4368(99)00002-5" @default.
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