High temperature mechanical spectroscopy of yttria stabilized zirconia reinforced with carbon nanotubes

High temperature mechanical properties of zirconia reinforced with carbon-nanotubes (CNTs) are studied by mechanical spectroscopy. CNTs limit zirconia grain-boundary sliding (GBS) and consequently deformation. Concurrent grain-growth and plastic deformation lead to a substantial error in the evaluation of deformation activation-enthalpy. Hence, a new calculation was developed in order to account for the effect of grain growth. The corrected enthalpy is comparable with the lattice diffusion energy of cations (Zr4+, Y3+), which evidences that at low-stress regime, GBS is accommodated by diffusional creep. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


Published in:
Physica Status Solidi A-Applications And Materials Science, 207, 2456-2460
Year:
2010
Keywords:
Laboratories:




 Record created 2011-12-16, last modified 2018-12-03


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