Ceramic—Ceramic bearing systems compared on different testing configurations

Chevalier, J.; Calès, B.; Drouin, J.M.; Stefani, Y.

doi:10.1016/b978-008042692-1/50064-9

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…Although Ce-TZP/ Al 2 O 3 showed lower wear rate despite relatively higher friction coefficient than alumina, such a contradictory result is not uncommon in ceramic-on-ceramic wear tests. 34,35 However, the wear test conducted in this study was small scale and not physiological. The pin-on-disk test was conducted because it is considered convenient and suitable for first evaluation of new ceramics.…”

Section: Discussionmentioning

confidence: 97%

Ce‐TZP/Al₂O₃ nanocomposite as a bearing material in total joint replacement

Tanaka¹,

Tamura²,

Kawanabe³

et al. 2002

J. Biomed. Mater. Res.

127

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The objectives of this study were to investigate the biocompatibility, phase stability, and wear properties of a newly developed Ce-TZP/Al(2)O(3) nanocomposite, as compared to conventional ceramics, and to determine whether the new composite could be used as a bearing material in total joint prostheses. In tests of mechanical properties, this composite showed significantly higher toughness than conventional Y-TZP. For biocompatibility tests, cylindrical specimens of both the Ce-TZP/Al(2)O(3) nanocomposite and monolithic alumina were implanted into the paraspinal muscles of male Wistar rats. The tissue reactions were almost the same, and at 24 weeks after implantation, thin fibrous capsules with almost no inflammation were observed around both of them. There were no significant differences in membrane thickness between the two ceramics. After hydrothermal treatment in 121 degrees C vapor for 18 h, the new composite showed complete resistance to aging degradation, whereas Y-TZP showed a phase transformation of 25.3 vol% (initial 0.4%) to the monoclinic form. According to the results of pin-on-disk tests, the wear rates of Ce-TZP/Al(2)O(3) nanocomposite and alumina were 0.55 +/- 0.04 x 10(-7) and 2.12 +/- 0.37 x 10(-7)mm(3)/Nm, respectively. The results of this study suggest that the Ce-TZP/Al(2)O(3) nanocomposite is a promising alternative ceramic component for total joint replacement.

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Section: Discussionmentioning

confidence: 97%