TY - GEN
T1 - Fabrication, nanomechanical properties and in vitro evaluation of (Ti, o)/Ti composite coating on NiTi shape memory alloy
AU - Sun, Tao
AU - Wang, Lang Ping
AU - Wang, Min
AU - Tong, Ho Wang
AU - Lu, William W.
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
KW - NiTi shape memory alloy
KW - biocompatibility
KW - mechanical properties
KW - plasma immersion ion implantation and deposition
KW - surface modification
UR - https://www.scopus.com/pages/publications/77957995051
U2 - 10.1007/978-3-642-14515-5_310
DO - 10.1007/978-3-642-14515-5_310
M3 - 会议稿件
AN - SCOPUS:77957995051
SN - 9783540790389
T3 - IFMBE Proceedings
SP - 1222
EP - 1225
BT - 6th World Congress of Biomechanics, WCB 2010 - In Conjunction with 14th International Conference on Biomedical Engineering, ICBME and 5th Asia Pacific Conference on Biomechanics, APBiomech
T2 - 6th World Congress of Biomechanics, WCB 2010 - In Conjunction with 14th International Conference on Biomedical Engineering, ICBME and 5th Asia Pacific Conference on Biomechanics, APBiomech
Y2 - 1 August 2010 through 6 August 2010
ER -