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

✍ Scribed by Mazaheri, Mehdi ;Mari, Daniele ;Schaller, Robert

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
307 KB
Volume
207
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

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.

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Influence of carbon nanotubes and silicon carbide whiskers on the mechanical loss due to grain boundary sliding in 3-mol% yttria-stabilized tetragonal zirconia polycrystals
✍ C. Ionascu; R. Schaller 📂 Article 📅 2006 🏛 Elsevier Science 🌐 English ⚖ 145 KB

High-temperature mechanical spectroscopy was performed in pure 3Y-TZP, i.e. 3-mol% yttria-stabilized polycrystalline tetragonal zirconia, in 3Y-TZP doped with multiwalled carbon nanotubes and in 3Y-TZP doped with silicon carbide whiskers. Silicon carbide doping results in an increase in the high-tem