Iron oxide material and members for dry lubricated systems inclu

Details Iron oxide material and members for dry lubricated systems inclu Iron oxide material and members for dry lubricated systems inclu

1971-12-27

1978-08-29

Weiffenbach, Cameron K.

Stock material or miscellaneous articles

Composite

Of metal

148 635, 427 11, 427 34, 427372R, 427419R, 427419A, 427419B, 427419F, 427423, 427427, 428471, 428472, B32B 1516

Patent

active

041105125

ABSTRACT:
Low friction material particularly adapted for use at high temperatures in the regenerator portion of gas turbine engines, the material comprising a work surface layer on a substrate, the work surface layer prior to a break-in period comprising an iron oxide (wustite--FeO, magnetite--Fe.sub.3 O.sub.4, or hematite--Fe.sub.2 O.sub.3) matrix containing an interspersed trapping material in the interstices thereof, the trapping material comprising an inorganic compound such as a salt or oxide; and subsequent to the break-in period, the work surface layer acquires a substantially continuous film of hematite--Fe.sub.2 O.sub.3 iron oxide in which the hexagonal Fe.sub.2 O.sub.3 crystals or cells provide a highly oriented structure. Transfer of the oriented film to the mating surface occurs during run-in.

REFERENCES:
patent: 1333586 (1920-03-01), Chruchward
patent: 2236728 (1941-04-01), Given
patent: 2387872 (1945-10-01), Bell
patent: 2588234 (1952-03-01), Henricks
patent: 2903384 (1959-09-01), Grass et al.
patent: 3142894 (1964-08-01), Ross et al.
patent: 3343362 (1967-09-01), Lunsford
patent: 3368970 (1968-02-01), Grunze et al.
patent: 3900200 (1975-08-01), Nakamura
patent: 3922444 (1975-11-01), Nakamura

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