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学科主题: 口腔医学
题名:
Enhanced corrosion resistance and cellular behavior of ultrafine-grained biomedical NiTi alloy with a novel SrO-SiO2-TiO2 sol-gel coating
作者: Zheng, C. Y.1,2,3; Nie, F. L.1,2,3; Zheng, Y. F.1,2,3; Cheng, Y.3; Wei, S. C.4; Ruan, Liqun5; Valiev, R. Z.6
关键词: Ultrafine-grained NiTi ; Sol-gel coating ; Cytocompatibility ; Corrosion resistance
刊名: APPLIED SURFACE SCIENCE
发表日期: 2011-04-15
DOI: 10.1016/j.apsusc.2011.02.006
卷: 257, 期:13, 页:5913-5918
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
研究领域[WOS]: Chemistry ; Materials Science ; Physics
关键词[WOS]: SEVERE PLASTIC-DEFORMATION ; SHAPE-MEMORY ALLOYS ; SURFACE-PROPERTIES ; TIO2-SIO2 FILMS ; TITANIUM ; BIOCOMPATIBILITY ; OXIDE ; BIOACTIVITY ; ATTACHMENT ; TIO2
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.

语种: 英语
所属项目编号: 31011120091 ; 51041004 ; 2007CB936103 ; 2082010 ; PKUJC2009001
项目资助者: NSFC-RFBR ; National Natural Science Foundation of China ; State Key Development Program for Basic Research of China ; Beijing Municipal Natural Science Foundation ; Fundamental Research Funds for the Central Universities
WOS记录号: WOS:000288205800074
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/65140
Appears in Collections:北京大学口腔医学院_期刊论文

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作者单位: 1.Peking Univ, Coll Engn, Dept Adv Mat & Nanotechnol, Beijing 100871, Peoples R China
2.Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
3.Peking Univ, Acad Adv Interdisciplinary Studies, Ctr Biomed Mat & Tissue Engn, Beijing 100083, Peoples R China
4.Peking Univ, Sch Stomatol, Dept Oral & Maxillofacial Surg, Beijing 100081, Peoples R China
5.Kumamoto Univ, Grad Sch Sci & Technol, Dept Mech Syst Engn, Kumamoto 8608555, Japan
6.Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa, Russia

Recommended Citation:
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]. APPLIED SURFACE SCIENCE,2011,257(13):5913-5918.
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