Purification of tantalum by plasma arc melting

Details Purification of tantalum by plasma arc melting Purification of tantalum by plasma arc melting

1997-07-10

1999-10-26

Wyszomierski, George

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 1029, 75 1043, 75 1045, 75612, 423 62, C21B 1110, C22B 3410, C01G 3100

Patent

active

059720654

ABSTRACT:
Purification of tantalum by plasma arc melting. The level of oxygen and carbon impurities in tantalum was reduced by plasma arc melting the tantalum using a flowing plasma gas generated from a gas mixture of helium and hydrogen. The flowing plasma gases of the present invention were found to be superior to other known flowing plasma gases used for this purpose.

REFERENCES:
patent: 4727928 (1988-03-01), De Vynck et al.
patent: 4743297 (1988-05-01), Kopatz
patent: 5239162 (1993-08-01), Haun
C. V. Robino, "Representation of Mixed Reactive Gases on Free Energy (Ellingham-Richardson) Diagrams", Metallurgical and materials Transactions B, vol. 27B, Feb. 1996, pp. 65-69.
Kouji Mimura and Michio Nanjo, "Production of Pure Tantalum by Carbon-Reduction Smelting and Hydrogen Plasma-Arc Melting with Refining", Materials Transactions, JIM, vol. 31, No. 4 (1990), pp. 293-301. No Month.
Kouji Mimura and Michio Nanjo, "Recent Developments in Plasma Metal Processing", High Temp. and Mat. Process., vol. 7, No. 1, 1986, pp. 1-16.
P. S. Dunn, D. R. Krozekwa, and F. G. Garcia, "Chemistry Modification of High Oxygen Carbon Powder by Plasma Melting", in Tantalum, Proceedings at the 125 TMS Annual Meeting and Exhibit, Annaheim CA, Feb. 5-8, 1996, ed. by E. Chen, A Crowson, E. Lavernia, W. Ebihara, and P. Kumar, Minerals, Metals and Materials Soc, 1996, pp. 325-334.

Affiliated with

Also associated with

Rating

Purification of tantalum by plasma arc melting does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Purification of tantalum by plasma arc melting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification of tantalum by plasma arc melting will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-758936