Alumina coated silicon carbide abrasive

Details Alumina coated silicon carbide abrasive Alumina coated silicon carbide abrasive

1979-05-21

1981-02-10

Arnold, Donald J.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51307, 51308, 51309, 415172A, 416241R, 427215, 428380, 428404, B24D 1100

Patent

active

042499135

ABSTRACT:
Disclosed is an improved abrasive material particularly useful as a dispersoid in metal matrices to provide articles of use having superior abrasive properties, especially at elevated temperatures. The improved abrasive material typically comprises silicon carbide particulate, the individual particles of which have a predominantly alumina coating thereon to inhibit dissolution of the particles in the metal matrix at high temperatures. The invention finds special application in abrasive blade tips for service in gas turbine engines, the tips comprising a nickel base or cobalt base superalloy having the alumina coated silicon carbide particles dispersed therein.

REFERENCES:
patent: 3508890 (1970-04-01), Fontanella
patent: 3779726 (1973-12-01), Fisk et al.

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