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

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:649

Article

Akbari-Fakhrabadi, A.¹  Meruane, V.¹  Jamshidijam, M.^2,3  Gracia-Pinilla, M. A.^4,5  Mangalaraja, R. V.² 

[1] Univ Chile, Dept Mech Engn, Adv Mat Lab, Santiago, Chile

[2] Univ Concepcion, Dept Mat Engn, Adv Ceram & Nanotechnol Lab, Concepcion, Chile

[3] Islamic Azad Univ, Sirjan Branch, Dept Mat Engn, Sirjan, Iran

[4] Univ Autonoma Nuevo Leon, Fac Ciencias Fismatemat, San Nicolas De Los Garza, NL, Mexico

[5] Univ Autonoma Nuevo Leon, Ctr Invest & Innovac Desarrollo Ingn & Tecnol, Apodaca, NL, Mexico

关键词: Combustion synthesis;    Doped ceria;    Mesoporous;    Mechanical properties;   

DOI  :  10.1016/j.msea.2015.09.125

来源: Elsevier

【 摘 要 】

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. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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