Autowave synthesis of cast aluminum oxynitrides with a high nitrogen content
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Aluminum oxynitrides Al22O30N2 and Al23O27N5 and a number of Al-O-N solid solutions with a nitrogen content of 2.3 to 6.5 wt % were prepared from (CrO3-Al-Al2O3-AlN) thermite-type mixtures with a high combustion temperature (2950–3200 K) by using the autowave synthesis method. The synthesis was conducted in a hermetically sealed reactor at an initial nitrogen pressure of 4.0 to 8.0 MPa. The aluminum nitride content was demonstrated to influence the nitrogen content in cast aluminum oxynitrides and on their microstructure and phase composition.
KeywordsNitrogen Content Combustion Temperature Electron Microprobe Analysis Initial Mixture Burning Velocity
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