Mechanical behavior and ultrasonic non-destructive characterization of elastic properties of cordierite-based ceramics

A. Benhammou (1, 2) , Y. El Hafiane (1) , L. Nibou (1) , A. Yaacoubi (2) , Julien Soro (3) , Agnès Smith (3) , Jean-Pierre Bonnet (3) , B. Tanouti (2)

1 ENSA - Ecole Nationale des Sciences Appliquées [Safi]
2 Faculté des Sciences Semlalia [Marrakech]
3 GEMH - Groupe d'Etudes des Matériaux Hétérogènes

The structural and morphological evolutions of cordierite-based ceramics produced from stevensite/andalusite mixture sintered from 1150 to 1350 °C were studied using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The mechanical behavior was investigated by three-point bending and Brazilian tests. The elastic properties were evaluated using ultrasonic non-destructive testing (NDT). XRD results revealed that the main crystalline phase formed at 1300 and 1350 °C was cordierite with traces of mullite. A linear-elastic behavior followed by brittle fracture was observed in three-point bending test with the presence of multiple discontinuities. Flexural and diametral compression strength values of cordierite sintered at 1300 °C were 39.4±4 and 21.8±2 MPa, respectively. The elastic properties such as Young's modulus (38.7–45.1 GPa), shear modulus (17.90–19.42 GPa) and Poisson ratio (0.08–1.6) of cordierite-based ceramics produced at 1350 and 1300 °C were also determined.

Mots clés: Mechanical behavior; Ultrasonic testing; Elastic properties; D. Cordierite

Domaines: Matériaux

A. Benhammou, Y. El Hafiane, L. Nibou, A. Yaacoubi, Julien Soro, et al.. Mechanical behavior and ultrasonic non-destructive characterization of elastic properties of cordierite-based ceramics. Ceramics International, 2013, 39 (1), pp.21-27. ⟨10.1016/j.ceramint.2012.06.061⟩. ⟨hal-01115578⟩