FTIR spectroscopic and electrochemical characterizations of tantalum(V) in 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate (Pyr14TFMS)-TaCl5 ionic liquids are performed with 5, 15, and 35 mol% TaCl5 as the media for potential electrochemical application. On the basis of FTIR spectra the electrochemical active species are identified as follows: [TaOCl4]−, [TaOCl5]2−, [TaCl5F]−, and [TaCl...

Tungsten has been chosen as the plasma-facing material (PFM) for divertor region in ITER and also a candidate PFM future plasma-burning nuclear fusion reactors. During device operation, PFMs will be exposed to low-energy He irradiation at high temperatures, resulting sub-surface bubbles surface morphology changes such pores fuzz. Carbide dispersion-strengthened W materials may enhance ductility...

State-of-the-art melting of tantalum and tantalum alloys has relied on electron beam (EB) or vacuum arc remelting (VAR) for commercial ingot production. Plasma arc melting (PAM) provides an alternative for melting tantalum that contains very high levels of interstitials where other melting techniques can not be applied. Previous work in this area centered on plasma arc melt quality and final in...

Recently, PEO process of tantalum has been developed as a method of producing corrosion-resistant, hard, wear-resistant, and biocompatible as well as having good adhesion coatings. In this review, we present the results of PEO process of tantalum in three main electrolytes. This review tries to measure the effect of electrolyte composition and voltage that were used within PEO procedure on the ...

Recent interest in tantalum is due to increases in spot prices for tantalum raw materials which during 2000 reached US$145 to 175/lb of contained Ta2O5 (Platt’s Metals Week) and as much as US$ 350 /lb which was the bid rate for the Oct 2000 Davis Langdon Australia (DLA) Tender. As a result, exploration companies targeted a variety of pegmatites, specialty granites, alkaline complexes and carbon...

We report a simple method to fabricate nano-porous tantalum oxide films via anodization with Ta foils as the anode at room temperature. A mixture of ethylene glycol, phosphoric acid, NH4F and H2O was used as the electrolyte where the nano-porous tantalum oxide could be synthesized by anodizing a tantalum foil for 1 h at 20 V in a two-electrode configuration. The as-prepared porous film exhibite...

Titanium carbide is used as an attractive reinforcement to produce particulate metal matrix composites. One of the problems to use this carbide as a reinforcement in copper-based composites is the lack of wetability in Cu-TiC system. This property improves as the C/Ti ratio in carbide decreases. Problems to use this carbide as a reinforcement in copper-based composites is the lack of wetabiity...

The use of liquid-liquid extraction for the separation of tantalum from niobium was demonstrated. Tantalum and niobium spectrographically free of each other were prepared in quantity on a continuous basis.