Effect of the method of fabricating SiC, Si3N4, and a1n specimens on their resistance to hightemperature oxidation

Effect of the method of fabricating SiC, Si3N4, and a1n specimens on their resistance to... The methods of high-pressure sintering (5 GPa) and, for comparison, conventional hot pressing are used for fabricating high-density specimens from SiC, Si3N4, and A1N with the use of activating additives and without them. The high-temperature oxidation is studied by the method of thermogravimetry at 1400°C with a 150-min hold. The introduction of additives in order to activate the sintering increases the resistance of hot-pressed specimens to high-temperature oxidation and does not influence the stability of materials obtained in a high-pressure apparatus. The corrosion resistance of materials sintered under a high pressure turns out to be much higher than that of hot-pressed materials, which is connected with the formation of superfine-grained densely fit oxide films http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Effect of the method of fabricating SiC, Si3N4, and a1n specimens on their resistance to hightemperature oxidation

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Publisher
Springer US
Copyright
Copyright © 1999 by Kluwer Academic/Plenum Publishers
Subject
Chemistry; Characterization and Evaluation of Materials; Materials Science; Ceramics, Glass, Composites, Natural Methods
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/BF02762583
Publisher site
See Article on Publisher Site

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