Phase Stability of Zirconia Toughened Alumina Composite for Artificial Joints
The phase stability under aqueous condition and changes in the wear region after the Pin-on-Flat wear testing were evaluated using Raman and fluorescence spectroscopy techniques and X-ray diffractometry for a newly developed zirconia toughened alumina (JMM-ZTA). This study suggests that JMM-ZTA is a highly stable material under aqueous environment in the human body and has a high wear resistance in Pin-on-Flat wear tests. This results from a transformation toughening mechanism operative in JMM-ZTA. Therefore, JMM-ZTA appears to have a possibility to improve the performance of monolithic alumina as a material for hip and knee joint prostheses.
Takashi Nakamura, Kimihiro Yamashita and Masashi Neo
J. Ikeda et al., "Phase Stability of Zirconia Toughened Alumina Composite for Artificial Joints ", Key Engineering Materials, Vols. 309-311, pp. 1243-1246, 2006