Ti6Al4V-alloy is commonly used in dental and orthopedic applications where tribochemical reactions occur at material/bone interface. These reactions are one of the main concerns regarding Ti6Al4V implants due to the generation of wear particles, linked to the release of metallic ions in toxic concentration which occurs when TiO₂ passive film is destroyed by means of wear and corrosion simultaneously. In the present study, a multi-material Ti6Al4V-PEEK cellular structure is proposed. Selective Laser Melting technique was used to produce Ti6Al4V dense and cellular structured specimens, whilst Hot-Pressing technique was employed to obtain multi-material Ti6Al4V-PEEK structures. This study investigates the tribocorrosion behavior of these materials under reciprocating sliding, comparing them with commercial forged Ti6Al4V. Open-circuit-potential was measured before, during and after sliding while dynamic coefficient of friction was assessed during sliding. The results showed an improved wear resistance and a lower tendency to corrosion for the multi-material Ti6Al4V-PEEK specimens when compared to dense and cellular structures mono-material specimens. This multi-material solution gathering Ti6Al4V and PEEK, besides being able to withstand the loads occurring after implantation on dental and orthopedic applications, is a promising alternative to fully dense metals once it enhances the tribocorrosion performance.

Ti6Al4V合金通常用于牙齿和整形外科应用中，材料/骨界面处会发生摩擦化学反应。这些反应是有关Ti6Al4V植入物的主要问题之一，因为会产生磨损颗粒，这与释放TiO ₂时发生的有毒浓度的金属离子有关钝化膜同时被磨损和腐蚀破坏。在本研究中，提出了一种多材料的Ti6Al4V-PEEK细胞结构。选择性激光熔化技术用于生产Ti6Al4V致密的蜂窝状结构标本，而热压技术用于获得多材料的Ti6Al4V-PEEK结构。这项研究调查了这些材料在往复滑动下的摩擦腐蚀行为，并将其与商用锻造Ti6Al4V进行了比较。在滑动之前，期间和之后测量开路电位，同时在滑动期间评估动态摩擦系数。结果表明，与致密和多孔结构的单材料试样相比，多材料Ti6Al4V-PEEK试样具有更高的耐磨性和更低的腐蚀趋势。