Premium
High temperature mechanical spectroscopy of yttria stabilized zirconia reinforced with carbon nanotubes
Author(s) -
Mazaheri Mehdi,
Mari Daniele,
Schaller Robert
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201026331
Subject(s) - materials science , grain boundary , creep , cubic zirconia , yttria stabilized zirconia , diffusion creep , grain boundary diffusion coefficient , enthalpy , carbon nanotube , grain boundary sliding , composite material , lattice diffusion coefficient , deformation (meteorology) , grain growth , grain size , thermodynamics , ceramic , effective diffusion coefficient , microstructure , medicine , physics , radiology , magnetic resonance imaging
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 (Zr 4+ , Y 3+ ), which evidences that at low‐stress regime, GBS is accommodated by diffusional creep.