Compressive creep of ultrafine grained MgO polycrystalsReport as inadecuate

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Abstract : Steady state compressive creep of ultrafine-grained MgO has been studied in the temperature range 0.3 to 0.38 Tm. The specimens were fabricated by reactive hot pressing i.e. by hot-pressing of MgOH2 during the decomposition reaction, which produced dense specimens 90 % of the theoretical density with 1 000 Å average grain size. The value of the stress exponent was found to be unity and the activation enthalpy was of the order of 36 kcal-mole.

Keywords : ceramics creep hot pressing magnesium compounds ultrafine grained MgO polycrystals compressive creep reactive hot pressing decomposition reaction stress exponent activation enthalpy

Author: J. Crampon A.C.D. Chaklader B. Escaig



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