Abstract
In this study, we focused on the problems associated with ceramic artificial hip joints such as fractures, noise, and wear during service. Mn-doped zirconia-toughened alumina (Mn-ZTA) ceramics have been proposed to enhance the friction interface lubrication. The microstructure, mechanical properties, long-term stability, as well as tribological properties and wear mechanisms in physiological solutions of Mn-ZTA ceramics were evaluated. The long-term stability of zirconia-toughened alumina (ZTA) improved after the addition of Mn in a hydrated environment. After adding 1 wt.% Mn to ZTA, its wear rate decreased when wear in phosphate buffer solution. The tribological properties of the ZTA after 1 wt.% and 3 wt.% Mn doping improved when wear in bovine serum albumin solution, with the thicker protein layers forming inside the wear tracks, reducing the contact stress and improving the tribological properties. The major wear mechanism of Mn-ZTA ceramics in physiological solutions is abrasive wear.
Published Version
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