Journal ArticleDOI
The reduction of niobium and tantalum pentoxides by silicon in vacuum
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TLDR
The use of silicon as a reducing agent for Nb 2 O 5 and Ta 2 O O 5 to obtain the metals under pyrovacuum conditions has been investigated in this article.About:
This article is published in Journal of Alloys and Compounds.The article was published on 2001-02-09. It has received 26 citations till now. The article focuses on the topics: Tantalum & Silicon monoxide.read more
Citations
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Journal ArticleDOI
Studies on fluorination of Y2O3 by NH4HF2
TL;DR: In this paper, the mass changes at room temperature and by employing TGA and DTA at higher temperatures were observed by X-ray diffraction, and the subsequent phase changes were analyzed by observing the mass change at high temperatures.
Journal ArticleDOI
On the development of grain growth resistant tantalum alloys
Michael Bischof,Svea Mayer,Harald Leitner,Helmut Clemens,Peter Staron,E. Geiger,A. Voiticek,Wolfram Knabl +7 more
TL;DR: In this article, the effects of doping with varying combinations of Si and Y on microstructure and mechanical properties of cold-worked and annealed Ta powders have been investigated.
Journal ArticleDOI
Production of tantalum by aluminothermic reduction in plasma reactor
TL;DR: In this article, the production of metallic tantalum (Ta) has been investigated through the reduction of Ta2O5 by aluminothermic reduction technique (ATR), using hydrogen plasma to trigger the exothermal reaction.
Journal ArticleDOI
The chemical state and control of oxygen in powder metallurgy tantalum
TL;DR: In this paper, an in situ contact gettering method using zirconium has been coupled with hot-pressing to control oxygen, which is effective at removing oxygen from the solid solution, while the precipitation behavior is not significantly altered.
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Determination of Standard Free Energy of Formation for Niobium Silicides by EMF Measurements
TL;DR: In this paper, Li 2 O-SiO 2/NbSi 2/kJ = -165 + 0.008 (T/K) ± 13 and ΔG 0 Nb 5Si3/kj = -526 +0.009 (T /K) + 63, respectively.
References
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Book
Binary alloy phase diagrams
TL;DR: Binary Alloy Phase Diagrams, Second Edition, Plus Updates, on CD-ROM offers you the same high-quality, reliable data you'll find in the 3-volume print set published by ASM in 1990.
Book
Thermochemical data of pure substances
TL;DR: In this article, the first law of thermodynamics and the third law of Nernst heat theorem are used to construct tables of thermochemical data of pure substances, which are then used for thermodynamic calculations.
Journal ArticleDOI
Refining of tantalum by sacrificial and carbon deoxidation
TL;DR: In this paper, the removal of residual oxygen from tantalum by pyrovacuum treatment using both sacrificial deoxidation (TaO(g)) and carbon deoxification (as CO) was studied.
Journal ArticleDOI
Refining of tantalum by silicon deoxidation
TL;DR: In this paper, the possibility of eliminating oxygen from a Ta-Si-O solid solution by preferential evaporation of SiO(v) was indicated by calculations based on the experimental or estimated values for the activities of silicon and oxygen in the solid solution as well as for the standard free energies of formation of tantalum suboxide and silicon monoxide.