Preparation of molten salt electrolytes containing divalent tita

Details Preparation of molten salt electrolytes containing divalent tita Preparation of molten salt electrolytes containing divalent tita

1993-07-26

1994-12-13

Niebling, John

Chemistry: electrical and wave energy

Processes and products

204 64T, C25C 336

Patent

active

053726812

ABSTRACT:
Divalent titanium is prepared by the reduction of higher valence titanium halides in a molten salt electrolyte for subsequent titanium deposition with aluminum to form alloys exhibiting excellent mechanical properties for use at high temperatures. At least one aluminum halide such as AlCl.sub.3 is combined with aluminum metal, at least one titanium halide such as TiCl.sub.3 where the titanium has a valence greater than two, and at least one salt capable of forming a melt with said aluminum halide at temperatures up to about 250.degree. C. to form a molten salt electrolyte. The salt may be an alkali, alkaline earth or organic halide. Upon heating in an inert atmosphere at a temperature greater than the melting point of the electrolyte, the higher valence titanium is reduced by aluminum metal to form divalent titanium. Titanium-aluminum alloys of up to 50 atomic percent titanium can then be deposited from the electrolyte.

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patent: 3444058 (1969-05-01), Mellors et al.
C. Scordilis-Kelley et al., J. Electrochem. Soc. 139, "Alkali Metal Reduction Potentials Measured in Chloroaluminate Ambient-Temperature Molten Salts" (1992), pp. 694-698 (no month).
Alpert et al., J. Electrochem. Soc. 104, No. 9 (Sep. 1957), "Electrolytic Preparation of Titanium From Fused Salts", pp. 555-559.
Senderoff, Electrochemical Society, "Electrodeposition of Coherent Deposits of the Refractory Metals" in Modern Electroplating, pp. 473-474 (F. A. Lowenheim ed., 1974) (no month).
Stafford, J. Electrochem. Soc., 136, "The Electrodeposition of an Aluminum-Manganese Metallic Glass From Molten Salts", (1989), pp. 635-639.
Janowski et al., Metallurgical Trans. A, 23, "The Microstructure of Electrodeposited Titanium-Aluminum Alloys", pp. 2715-2723 (1992) Oct.

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