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Refractories and Industrial Ceramics

, Volume 40, Issue 7–8, pp 338–340 | Cite as

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

  • S. F. Korablev
  • I. R. Korableva
Research
  • 11 Downloads

Abstract

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

Keywords

Boron Nitride Aluminium Nitride Scale Resistance Large Reaction Volume Polytype Form 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    A. A. Pugach, O. O. Postolova, and S. F. Korablev, “Effect of high pressures on structure and high temperature oxidation resistance of aluminium nitride ceramics,“ in:Proc. XI AIRAPT Int. Conf. [in Russian], Naukova Dumka, Kiev (1989), pp. 225–228.Google Scholar
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Copyright information

© Kluwer Academic/Plenum Publishers 1999

Authors and Affiliations

  • S. F. Korablev
    • 1
    • 2
  • I. R. Korableva
    • 1
    • 2
  1. 1.National Technical UniversityUkraine
  2. 2.Institute of Problems of Material Science of the National Academy of Sciences of UkraineUkraine

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