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Role of cold isostatic pressing in the formation of the properties of ZrO2-base ceramics obtained from ultradisperse powders

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Abstract

The physicomechanical properties of ceramics obtained from plasmachemical and sol-gel powders of partially stabilized (3% Y2O3) zirconia (PSZ) and its compositions with 20% Al2O3 by cold isostatic pressing (CIP) at a pressure of at most 2 GPa and sintering at 1300–1650°C are investigated. It is established that plasmachemical PSZ exhibits its best properties (K lc=7.8 MPa · m1/2, a strength of 650 MPa) only after complete disintegration at a CIP of 0.1 GPa and a sintering temperature of 1650°C, when the material is sintered to a density of 5.5 g/cm3. After partial stabilization and CIP at 0.1 GPa the plasmachemical composition of PSZ+20% Al2O3 is sintered at 1650°C to a density of 4.7 g/cm3, but hasK lc=8.5 MPa · m1/2 and a strength of 700 MPa. The deagglomerated sol-gel powder exhibits properties at a level ofK lc=12.4 MPa · m1/2 and a strength of 950 MPa at a density above 6.0 g/cm3 after CIP at 0.3 GPa and sintering at 1450°C. The latter obviously has the best mechanical properties of all the investigated materials.

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Authors and Affiliations

  1. Donetsk Physicotechnical Institute, Donetsk, Ukraine

    G. Ya. Akimov, I. Yu. Prokhorov, I. V. Gorelik & V. M. Timchenko

  2. Dnepropetrovsk Chemical Engineering Institute, Dnepropetrovsk, Ukraine

    V. G. Vereshchak

  3. Institute of Materials Technology, Kiev, Ukraine

    A. D. Vasil'ev

Authors
  1. G. Ya. Akimov
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  2. I. Yu. Prokhorov
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  3. I. V. Gorelik
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  4. V. M. Timchenko
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  5. V. G. Vereshchak
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  6. A. D. Vasil'ev
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Translated from Ogneupory, No. 2, pp. 12 – 19, February, 1995.

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Akimov, G.Y., Prokhorov, I.Y., Gorelik, I.V. et al. Role of cold isostatic pressing in the formation of the properties of ZrO2-base ceramics obtained from ultradisperse powders. Refractories 36, 47–53 (1995). https://doi.org/10.1007/BF02226988

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  • DOI: https://doi.org/10.1007/BF02226988

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