Purification of Niobium by Electron Beam Melting
Abstract: Pure niobium metal, produced by alumino-thermic reduction of niobium oxide, contains various impurities which need to be reduced to acceptable levels to obtain aerospace grade purity. In the present work, an attempt has been made to refine niobium metals by electron beam drip melting technique to achieve purity confirming to the ASTM standard. Input power to the electron gun and melt rate were varied to observe their combined effect on extend of refining and loss of niobium. Electron beam (EB) melting is shown to reduce alkali metals, trace elements and interstitial impurities well below the specified limits. The reduction in the impurities during EB melting is attributed to evaporation and degassing due to the combined effect of high vacuum and high melt surface temperature. The % removal of interstitial impurities is essentially a function of melt rate and input power. As the melt rate decreases or input power increases, the impurity levels in the solidified niobium ingot decrease. The EB refining process is also accompanied by considerable amount of niobium loss, which is attributed to evaporation of pure niobium and niobium sub-oxide. Like other impurities, Nb loss increases with decreasing melt rate or increase in input power.
- Location
-
Deutsche Nationalbibliothek Frankfurt am Main
- Extent
-
Online-Ressource
- Language
-
Englisch
- Bibliographic citation
-
Purification of Niobium by Electron Beam Melting ; volume:35 ; number:6 ; year:2016 ; pages:621-627 ; extent:7
High temperature materials and processes ; 35, Heft 6 (2016), 621-627 (gesamt 7)
- Creator
-
Sankar, M.
Mirji, K.V.
Prasad, V.V. Satya
Baligidad, R.G.
Gokhale, A.A.
- DOI
-
10.1515/htmp-2014-0218
- URN
-
urn:nbn:de:101:1-2501270514596.234565819654
- Rights
-
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
-
15.08.2025, 7:28 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Sankar, M.
- Mirji, K.V.
- Prasad, V.V. Satya
- Baligidad, R.G.
- Gokhale, A.A.
Other Objects (12)
Production of High-Purity Niobium by Carbon Reduction Smelting and Electron Beam Melting
Refining Tungsten Purification by Electron Beam Melting Based on the Thermal Equilibrium Calculation and Tungsten Loss Control
Simulation of evaporation phenomena in selective electron beam melting
Simulation of Evaporation Phenomena in Selective Electron Beam Melting
Physico-Chemical Aspects of the Nb-C-O System and Production of Niobium and its Alloys by Carbothermic Reduction and Electron Beam Melting
Melting ceramic Al2O3 powder by electron beam powder bed fusion
Processing of High‐Carbon Steel by Selective Electron Beam Melting
Electron-stimulated purification of platinum nanostructures grown via focused electron beam induced deposition
Simulation of selective electron beam melting processes : = Simulation der selektiven Elektronenstrahlschmelzprozesse
Creep–Fatigue Interaction of Inconel 718 Manufactured by Electron Beam Melting
Investigations of particle-process-part quality relationships in electron beam melting
Feasibility of Melting NbC Using Electron Beam Powder Bed Fusion
Production of High-Purity Niobium by Carbon Reduction Smelting and Electron Beam Melting
Refining Tungsten Purification by Electron Beam Melting Based on the Thermal Equilibrium Calculation and Tungsten Loss Control
Simulation of evaporation phenomena in selective electron beam melting
Simulation of Evaporation Phenomena in Selective Electron Beam Melting
Physico-Chemical Aspects of the Nb-C-O System and Production of Niobium and its Alloys by Carbothermic Reduction and Electron Beam Melting
Melting ceramic Al2O3 powder by electron beam powder bed fusion
Processing of High‐Carbon Steel by Selective Electron Beam Melting
Electron-stimulated purification of platinum nanostructures grown via focused electron beam induced deposition
Simulation of selective electron beam melting processes : = Simulation der selektiven Elektronenstrahlschmelzprozesse
Creep–Fatigue Interaction of Inconel 718 Manufactured by Electron Beam Melting
Investigations of particle-process-part quality relationships in electron beam melting
Feasibility of Melting NbC Using Electron Beam Powder Bed Fusion
Production of High-Purity Niobium by Carbon Reduction Smelting and Electron Beam Melting
Refining Tungsten Purification by Electron Beam Melting Based on the Thermal Equilibrium Calculation and Tungsten Loss Control
Simulation of evaporation phenomena in selective electron beam melting
Simulation of Evaporation Phenomena in Selective Electron Beam Melting
Physico-Chemical Aspects of the Nb-C-O System and Production of Niobium and its Alloys by Carbothermic Reduction and Electron Beam Melting
Melting ceramic Al2O3 powder by electron beam powder bed fusion
Processing of High‐Carbon Steel by Selective Electron Beam Melting
Electron-stimulated purification of platinum nanostructures grown via focused electron beam induced deposition
Simulation of selective electron beam melting processes : = Simulation der selektiven Elektronenstrahlschmelzprozesse
Creep–Fatigue Interaction of Inconel 718 Manufactured by Electron Beam Melting
Investigations of particle-process-part quality relationships in electron beam melting