Compositions: ceramic – Ceramic compositions – Refractory
Patent
1989-04-21
1990-09-18
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501 98, 501127, 51307, C04B 3558, C04B 3510
Patent
active
049578863
ABSTRACT:
The present invention provides a nearly fully dense, microcrystalline, composite ceramic abrasive particle comprising grains of alumina, gamma-aluminum oxynitride and, optionally, a Periodic Group IVB metal nitride in the system Al.sub.2 O.sub.3 /ALON/Group IVB metal nitride. In another aspect, two different processes for making an abrasive particle such as an abrasive grit, comprising a multiphase mixture of microcrystalline components in this system using sol gel techniques and pressureless reaction-sintering, are disclosed.
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Forester Thomas E.
Mathers James P.
Wood William P.
Bell Mark L.
Green Anthony J.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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