Hybrid a-CNH+TiO2+TiN-type surface layers produced on NiTi shape memory alloy for cardiovascular applications

被引：14
作者：
Witkowska, Justyna [1 ]
Sowinska, Agnieszka [2 ]
Czarnowska, Elzbieta [2 ]
Plocinski, Tomasz [1 ]
Kaminski, Janusz [1 ]
Wierzchon, Tadeusz [1 ]
机构：
[1] Warsaw Univ Technol, Fac Mat Sci & Engn, Warsaw, Poland
[2] Childrens Mem Hlth Inst, Pathol Dept, Warsaw, Poland
来源：
NANOMEDICINE | 2017年 / 12卷 / 18期
关键词：
glow discharge oxynitriding; NiTi alloy; radio frequency chemical vapor deposition process; IN-VITRO; CORROSION-RESISTANCE; PLATELET-ADHESION; CARBON COATINGS; PLASMA; HEMOCOMPATIBILITY; BIOMATERIALS; IMPLANTATION; WETTABILITY; RELEASE;
D O I：
10.2217/nnm-2017-0092
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Aim: The goal was to improve the properties of NiTi shape memory alloy to make it suitable for cardiac applications. For this purpose, a hybrid a-CNH+TiO2+TiN-type surface layer was produced on NiTi alloy and characterized. Materials & methods: The NiTi alloy subjected to hybrid process combining low-temperature oxynitriding under glow discharge conditions and radio frequency chemical vapor deposition process was examined for microstructure, surface topography, corrosion resistance, wettability and surface-free energy, Ni ion release and platelets adhesion, aggregation and activation. Results: The hybrid surface layers showed slightly increased surface roughness, better corrosion resistance, a more hydrophobic nature, decreased surface free energy, smaller release of nickel ions and reduced platelets activation. Conclusion: The produced layers could expand the range of NiTi medical applications.
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收藏
页码：2233 / 2244
页数：12
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