Blocking of grain reorientation in self-doped alumina materials

SCRIPTA MATERIALIA

卷:64

Article

Suarez, M.^1,2  Fernandez, A.^1,2  Menendez, J. L.¹  Ramirez-Rico, J.³  Torrecillas, R.¹ 

[1] Univ Oviedo, Dept Nanostruct Mat, CINN, CSIC, Llanera 33428, Asturias, Spain

[2] Fdn ITMA, Llanera 33428, Asturias, Spain

[3] Univ Seville, Dpto Fis Mat Condensada, CSIC, ICMSE, Seville 41012, Spain

关键词: Ceramics;    Grain growth;    Self-doping;    Electron backscattering diffraction (EBSD);   

DOI  :  10.1016/j.scriptamat.2010.11.031

来源: Elsevier

【 摘 要 】

Alumina nanoparticles 10-20 nm in diameter were nucleated on alumina particles, 150 nm average diameter, by a colloidal route followed by calcination. It is shown that after sintering, the final grain size is up to 20% smaller due to the addition of the alumina nanoparticles. Electron backscattered diffraction analysis shows that whereas a correlation in the relative crystalline orientations between neighbouring grains exists in the pure materials, the addition of alumina nanoparticles results in a random crystalline orientation. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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