Method of manufacturing .beta.'SiAlON compounds
AssigneeCeraver
InventorJoel Demit
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Abstract
Method of manufacturing silicon nitrides with a general formula of Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, in which z is a number less than or equal to 2.8. Silicon nitride is made to react at a temperature higher than 1600.degree. C. and in the finely divided state on aluminium oxynitride, and in the presence of an agent which generates gaseous silicon monoxide. Application to the manufacture of hard materials of high resistance to oxidation and to creep at high temperature.
Claims12
Method of manufacturing .beta.' SiAlON compounds corresponding to the general formula Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, in which z represents a number less than or equal to 2,8, wherein silicon nitride in a finely divided state is made to react at a temperature greater than 1600.degree. C. with aluminum oxynitride in a finely divided state, without load, in the presence of gaseous silicon monoxide.
Dependencies are inferred from the claim text.