Effect of rare earth dopants on structural and mechanical properties of nanoceria synthesized by combustion method

Structural characteristics of combustion synthesized, calcined and densified pure and doped nanoceria with tri-valent cations of Er, Y, Gd, Sm and Nd were analyzed by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The results showed that the as-synthesized and...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2016-01, Vol.649, p.168-173
Main Authors: Akbari-Fakhrabadi, A., Meruane, V., Jamshidijam, M., Gracia-Pinilla, M.A., Mangalaraja, R.V.
Format: Article
Language:English
Subjects:
Cations
Cerium oxide
Combustion
Combustion synthesis
Dopants
Doped ceria
Elastic modulus
Mechanical properties
Mesoporous
Nanostructure
Rare earth metals
Roasting
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Summary:Structural characteristics of combustion synthesized, calcined and densified pure and doped nanoceria with tri-valent cations of Er, Y, Gd, Sm and Nd were analyzed by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The results showed that the as-synthesized and calcined nanopowders were mesoporous and calculated lattice parameters were close to theoretical ion-packing model. The effect of dopants on elastic modulus, microhardness and fracture toughness of sintered pure and doped ceria were investigated. It was observed that tri-valent cation dopants increased the hardness of the ceria, whereas the fracture toughness and elastic modulus were decreased.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2015.09.125