Method for depositing a layer of abrasive material on a substrat

Details Method for depositing a layer of abrasive material on a substrat Method for depositing a layer of abrasive material on a substrat

1986-03-21

1987-07-14

Beck, Shrive P.

Coating processes

Solid particles or fibers applied

Localized different areas produced

427204, 427205, 427226, 118 50, B05D 112

Patent

active

046801995

ABSTRACT:
Techniques are described for the formation of an abrasive surface layer on an article. The surface layer is characterized by a single layer of particles which are evenly spaced apart, in a high density arrangement, within a metallic matrix. In the deposition of the particles on the article, a vacuum is drawn through a perforated plate, wherein the location of each perforation corresponds to the desired location of one particle on the article surface. The vacuum holds one particle over each perforation in the plate, then the plate is positioned over the article and the vacuum level adjusted so that the particles fall onto the article. The matrix is then deposited by plasma arc spraying a superalloy powder. The invention is particularly suited to the formation of an abrasive layer on the tip surface of a blade used in a gas turbine engine.

REFERENCES:
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patent: 3617327 (1971-11-01), Daniel
patent: 3958039 (1976-05-01), Yabuki et al.
patent: 4227703 (1980-10-01), Stalker et al.

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