Growth and texture of spark plasma sintered Al 2 O 3 ceramics: A combined analysis of X-rays and electron back scatter diffraction

D. Pravarthana (1) , D. Chateigner (1) , L. Lutterotti (2) , M. Lacotte (1) , S. Marinel (1) , P. Dubos (1) , I. Hervas (1) , E. Hug (1) , P. Salvador (3) , W. Prellier (1)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 UNITN - Università degli Studi di Trento = University of Trento
3 CMU - Carnegie Mellon University [Pittsburgh]

Textured alumina ceramics were obtained by Spark Plasma Sintering of undoped commercial α-Al2O3 powders. Various parameters (density, grain growth, grain size distribution) of the alumina ceramics, sintered at two typical temperatures 1400 °C and 1700 °C, are investigated. Quantitative textural and structural analysis, carried out using a combination of Electron Back Scattering Diffraction and X-ray diffraction, are represented in the form of mapping and pole figures. The mechanical properties of these textured alumina ceramics include high elastic modulus and hardness values with high anisotropic nature, opening the door for a large range of applications.

Mots clés: Elastic modulus; Electron backscatter diffraction; Sintering; Ceramics; Elastic stiffness; Crystal structure; X-ray diffraction; Polycrystalline material; Nano-indentation; Metal oxides

Domaines: Chimie; Matériaux

D. Pravarthana, D. Chateigner, L. Lutterotti, M. Lacotte, S. Marinel, et al.. Growth and texture of spark plasma sintered Al 2 O 3 ceramics: A combined analysis of X-rays and electron back scatter diffraction. Journal of Applied Physics, 2013, 113 (15), pp.153510. ⟨10.1063/1.4802439⟩. ⟨hal-02450331⟩