| Biotribological Properties of TZP/Al2O3 Ceramics for Biomechanical Applications |
| Deuk-Yong Lee, Se-Jong Lee1, Ju-Woong Jang2, Hak-Kwan Kim2, Dae-Joon Kim3 |
Department of Materials Engineering, Daelim College of Technology
1Department of Materials Engineering, Kyungsung University
2Woori Dong Myung Dental Material Research Center
3Department of Advanced materials, Sejong University |
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| ABSTRACT |
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Biotribological properties, such as wear rate and friction coefficient, of 3Y-TZP and Low Temperature Degradation (LTD) free materials were investigated via a ball(SiC)-on-plate sliding wear test to evaluate the relationship between wear mechanism and phase transformation. Wear test was conducted with a sliding speed of 0.035 m/s at room temperature and at 25$0^{circ}C$ in air under a normal load of 49 N, respectively. Although friction coefficient of 3Y-TZP was the lowest due to the fine grain size, the highest wear loss and rate were observed due to the debris of monoclinic grains introduced during sliding and their values increased drastically with raising temperature. However, the biotribological properties of LTD-free materials were insensitive to temperature due to the inertness of the phase transformation, suggesting that they may be applicable to the biomechanical parts. |
| Key words:
Tetragonal zirconia polycrystal, Wear, Phase transformation |
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