Fabrication and mechanical properties of Al2O3/SiC/ZrO2 functionally graded material by electrophoretic deposition
Document Type
Article
Publication Date
1-1-2012
Abstract
This study describes the synthesis of Al2O3/SiC/ZrO2 functionally graded material (FGM) in bio-implants (artificial joints) by electrophoretic deposition (EPD). A suitable suspension that was based on 2-butanone was applied for the EPD of Al2O3/SiC/ZrO2, and a pressureless sintering process was applied as a presintering. Hot isostatic pressing (HIP) was used to densify the deposit, with beneficial mechanical properties after 2 h at 1800 degrees C in Ar atmosphere. The maximum hardness in the outer layer (90 vol. Al2O3 + 10 vol. SiC) and maximum fracture toughness in the core layer (75 vol. Al2O3 + 10 vol. SiC + 15 vol. ZrO2) composite were 20.8 +/- 0.3 GPa and 8 +/- 0.1 MPa m(1/2), respectively. The results, when compared with results from Al2O3/ZrO2 FGM, showed that SiC increased the compressive stresses in the outer layers, while the inner layers were under a residual tensile stress. (C) 2012 Elsevier Ltd. All rights reserved.
Keywords
Functionally graded material (FGM), Electrophoretic deposition (EPD), Silicon carbide, Alumina, Hot isostatic pressing (HIP)
Divisions
fac_eng
Publication Title
Journal of the Mechanical Behavior of Biomedical Materials
Volume
12
Publisher
Elsevier
Additional Information
Askari, E. Mehrali, M. Metselaar, I. H. S. C. Kadri, N. A. Rahman, Md. M.