2010 | OriginalPaper | Buchkapitel
Fabrication, Nanomechanical Properties and In Vitro Evaluation of (Ti, O)/Ti Composite Coating on NiTi Shape Memory Alloy
verfasst von : Tao Sun, Lang-Ping Wang, Min Wang, Ho-Wang Tong, William W. Lu
Erschienen in: 6th World Congress of Biomechanics (WCB 2010). August 1-6, 2010 Singapore
Verlag: Springer Berlin Heidelberg
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
In this investigation, to improve the long-term biocompatibility, bioactivity and mechanical properties of NiTi shape memory alloy (SMA), a sufficiently thick (Ti, O)/Ti composite coating (about 1.2 micron in thickness) was fabricated on NiTi SMA substrate using the plasma immersion ion implantation and deposition (PIIID) technique. Cross-sectional morphology of the composite coating was observed using scanning electron microscopy (SEM) and its thickness was evaluated by energy dispersive X-ray spectroscopy (EDX). X-ray diffraction (XRD) results showed that there were no diffraction peaks corresponding to TiO2 for the (Ti, O)/Ti composite coating, indicating that the (Ti, O) layer existed in the amorphous or nano-sized or poorly crystalline state in the composite coating. Nanohardness and elastic modulus of the composite coating were determined via nanoindentation tests. Pin-on-disc wear test results showed improved wear resistance of (Ti, O)/Ti coated NiTi SMA. For in vitro biological assessment of the composite coating, SaOS-2 osteoblast-like cells were cultured on coated and uncoated NiTi SMA samples. SaOS-2 cells seeded on (Ti, O)/Ti coated samples spread and adhered better than on uncoated samples.