Alumina coated silicon carbide abrasive particulate useful...

Details Alumina coated silicon carbide abrasive particulate useful... Alumina coated silicon carbide abrasive particulate useful...

C - Chemistry, Metallurgy

09

K

57/17

C09K 3/14 (2006.01) F01D 5/20 (2006.01)

Patent

CA 1128761

ALUMINA COATED SILICON CARBIDE PARTICULATE USEFUL AS AN ABRASIVE DISPERSOID IN METAL MATRICES ABSTRACT OF THE DISCLOSURE 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 dis- solution 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. EH-5785b

310982

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