Method for making an improved gas seal

Details Method for making an improved gas seal Method for making an improved gas seal

1977-12-21

1979-09-25

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 23, C25D 1500

Patent

active

041690206

ABSTRACT:
An improved gas seal between a stationary member and a movable member, one of which includes an abrasive tipped projection directed toward a surface of the other, for example a turbine engine blade and a cooperating shroud member, is provided through an improvement in the abrasive tip. Such improved tip of the projection is a composite of inner and outer tip portions, the inner portion comprising an alloy resistant to oxidation, sulfidation and thermal fatigue at operating temperatures and the outer tip portion comprising a matrix entrapping a plurality of abrasive particles which protrude from the matrix toward the surface of the other member. The inner tip portion is bonded with the metallic body of the projection and the outer tip portion is deposited on the inner tip portion.

REFERENCES:
patent: 2820746 (1958-01-01), Keeleric
patent: 3199836 (1965-08-01), Moyer
patent: 3339933 (1967-09-01), Foster
patent: 3957593 (1976-05-01), Haack

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