Surface protection of gamma and alpha-2 titanium aluminides by i

Details Surface protection of gamma and alpha-2 titanium aluminides by i Surface protection of gamma and alpha-2 titanium aluminides by i

1991-07-01

1997-12-09

Padgett, Marianne

Coating processes

Direct application of electrical, magnetic, wave, or...

Ion plating or implantation

427529, 427530, 427531, 148277, 148279, 148281, 148285, B05D 306, C23C 806

Patent

active

056958277

ABSTRACT:
A process invention for protecting alpha-2 and gamma titanium aluminide alloy specimens subjected to high temperature oxidation comprises providing an ion beam having an energy range from about 100 keV to about 170 keV. The ion beam incorporates an elemental species capable of promoting alumina formation. The ion beam is exposed to the specimen so as to implant a dose in a range from about 2.times.10.sup.16 to about 8.times.lO.sup.17 ions/cm.sup.2 for a sufficient time period to form a surface alloy of the elemental species and titanium aluminide near the surface of the specimen.

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patent: 4433005 (1984-02-01), Manty et al.
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patent: 4568396 (1986-02-01), Vardiman
patent: 4701301 (1987-10-01), Kuwahara et al.
patent: 5049418 (1991-09-01), Tobin
patent: 5077140 (1991-12-01), Luthra et al.
Pons et al "Oxidation of ion-implanted Ti in the 750.degree.-950.degree. C. Range" J. of Less-Commun-Metals, vol. 109 (1985 (no month)) pp. 45-56.

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