Method of making densified si.sub.3n.sub.4/oxynitride...

Details Method of making densified si.sub.3n.sub.4/oxynitride... Method of making densified si.sub.3n.sub.4/oxynitride...

C - Chemistry, Metallurgy

04

B

25/128

C04B 41/00 (2006.01)

Patent

CA 1247335

-18- ABSTRACT A method is disclosed for making a more densified silicon nitride comprising object under less stringent heating conditions without sacrificing physical properties. A mixture of silicon powder, 6-18% yttrium silicon oxynitride (a major proportion of which is the Y10Si6O24N2 phase), .4-3% Al2O3, and possibly up to 2% of an oxynitride forming oxide (Y2O3) is compacted, nitrided, and sintered to produce a silicon nitride/YSiO2N comprising object of relatively high density.

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