Phase Stability of Zirconia Toughened Alumina Composite for Artificial Joints

Author:

Ikeda Junji1,Pezzotti Giuseppe2,Nakanishi Takefumi1

Affiliation:

1. Japan Medical Materials, Co.

2. Kyoto Institute of Technology

Abstract

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.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Reference12 articles.

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5. [20] [40] [60] [80] 100 Accelerating time (hours).

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