Enhanced corrosion resistance and cellular behavior of ultrafine-grained   biomedical NiTi alloy with a novel SrO-SiO2-TiO2 sol-gel coating

doi:10.1016/j.apsusc.2011.02.006

CORC > 北京大学 > 工学院

	Enhanced corrosion resistance and cellular behavior of ultrafine-grained biomedical NiTi alloy with a novel SrO-SiO2-TiO2 sol-gel coating
	Zheng, C. Y. ; Nie, F. L. ; Zheng, Y. F. ; Cheng, Y. ; Wei, S. C. ; Ruan, Liqun ; Valiev, R. Z.
刊名	应用表面科学
	2011
关键词	Ultrafine-grained NiTi Sol-gel coating Cytocompatibility Corrosion resistance SEVERE PLASTIC-DEFORMATION SHAPE-MEMORY ALLOYS SURFACE-PROPERTIES TIO2-SIO2 FILMS TITANIUM BIOCOMPATIBILITY OXIDE BIOACTIVITY ATTACHMENT TIO2
DOI	10.1016/j.apsusc.2011.02.006
英文摘要	NiTi alloy has a unique combination of mechanical properties, shape memory effects and superelastic behavior that makes it attractive for several biomedical applications. In recent years, concerns about its biocompatibility have been aroused due to the toxic or side effect of released nickel ions, which restricts its application as an implant material. Bulk ultrafine-grained Ni50.8Ti49.2 alloy (UFG NiTi) was successfully fabricated by equal-channel angular pressing (ECAP) technique in the present study. A homogeneous and smooth SrO-SiO2-TiO2 sol-gel coating without cracks was fabricated on its surface by dip-coating method with the aim of increasing its corrosion resistance and cytocompatibility. Electrochemical tests in simulated body fluid (SBF) showed that the pitting corrosion potential of UFG NiTi was increased from 393 mV(SCE) to 1800 mV(SCE) after coated with SrO-SiO2-TiO2 film and the corrosion current density decreased from 3.41 mu A/cm(2) to 0.629 mu A/cm(2). Meanwhile, the sol-gel coating significantly decreased the release of nickel ions of UFG NiTi when soaked in SBF. UFG NiTi with SrO-SiO2-TiO2 sol-gel coating exhibited enhanced osteoblast-like cells attachment, spreading and proliferation compared with UFG NiTi without coating and CG NiTi. (C) 2011 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000288205800074&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter; SCI(E); 19; ARTICLE; 13; 5913-5918; 257
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154759]
专题	工学院
推荐引用方式 GB/T 7714	Zheng, C. Y.,Nie, F. L.,Zheng, Y. F.,et al. Enhanced corrosion resistance and cellular behavior of ultrafine-grained biomedical NiTi alloy with a novel SrO-SiO2-TiO2 sol-gel coating[J]. 应用表面科学,2011.
APA	Zheng, C. Y..,Nie, F. L..,Zheng, Y. F..,Cheng, Y..,Wei, S. C..,...&Valiev, R. Z..(2011).Enhanced corrosion resistance and cellular behavior of ultrafine-grained biomedical NiTi alloy with a novel SrO-SiO2-TiO2 sol-gel coating.应用表面科学.
MLA	Zheng, C. Y.,et al."Enhanced corrosion resistance and cellular behavior of ultrafine-grained biomedical NiTi alloy with a novel SrO-SiO2-TiO2 sol-gel coating".应用表面科学 (2011).