Niobium-aluminum-titanium intermetallic compounds

Details Niobium-aluminum-titanium intermetallic compounds Niobium-aluminum-titanium intermetallic compounds

1991-07-23

1993-06-01

Roy, Upendra

Metal treatment

Stock

Vanadium, niobum, or tantalum base

420417, 428627, 428662, C22C 1400, C22C 2900

Patent

active

052156052

ABSTRACT:
Intermetallic compounds or alloys comprising niobium with and from 10 to 28 atomic percent titanium and from 14 to 17.5 atomic percent aluminum characterized by very high temperature melting points, high compressive strength at room temperature, higher room temperature compressive strength after annealing, machineable with conventional tooling, a B2 crystal structure in the as-cast condition, a two-phase microstructure in the annealed condition consisting of a B2 matrix and a second phase with the A15 crystal structure, an expected low value for coefficient of thermal expansion and susceptible to fabrication into single crystals.

REFERENCES:
patent: 4896815 (1990-01-01), Rosenthal
patent: 5019334 (1991-05-01), Jackson
Kaltenbach et al, Z. Metallkde, 80 (1989) 535.
Prokoshkin et al, "Alloys of Niobium" Acad. Science, USSR, 1985, pp. 136-137.

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