Si.sub.3n.sub.4 ceramic articles having lower density outer...

Details Si.sub.3n.sub.4 ceramic articles having lower density outer... Si.sub.3n.sub.4 ceramic articles having lower density outer...

C - Chemistry, Metallurgy

04

B

261/1, 25/128

C04B 35/58 (2006.01) C04B 35/584 (2006.01) C04B 35/64 (2006.01) F01D 11/12 (2006.01)

Patent

CA 1162947

Si3N4 CERAMIC ARTICLES HAVING LOWER DENSITY OUTER LAYER, AND METHOD ABSTRACT Monolithic Si3N4 ceramic bodies having a lower density outer layer are produced by a one-step sinter- ing in an ambient atmosphere of water vapor and a non- reactive diluent gas, and are useful, for exalmple, as abradable seal and impact resistant structural elements. D-22,191

384042

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