Corrosion Resistance and Adhesion Strength of a Dlc-Coated Bio-Medical Ti Alloy with an Interlayer of Ti/Si Hybrid Oxides

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Project title

Code/計畫編號

MOST106-2221-E019-032

Translated Name/計畫中文名

以氧化鈦矽複合氧化物為中間層之類鑽碳被覆生醫鈦合金的抗腐蝕性與結合強度

Project Coordinator/計畫主持人

Chau-Chang Chou

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Mechanical and Mechatronic Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=12228094

Year

2017

Start date/計畫起

01-08-2017

Expected Completion/計畫迄

01-07-2018

Bugetid/研究經費

718千元

ResearchField/研究領域

機械工程

"本計畫研究具有耐腐蝕中間層之鈦六鋁四釩底材上被覆含氟類鑽碳薄膜的材料微結構與結合強度和抗腐蝕性。此中間層係利用溶膠-凝膠製程之浸漬覆膜方法分別製作不同比例之TiO2 和SiO2 非晶質複合膜而成，是具有抗氧化與腐蝕能力的複合氧化層；最外層的功能性類鑽碳膜，則是以射頻電漿輔助化學氣相沉積系統調整CH4 與CF4 比例以及工作壓力所製備。透過原子力顯微鏡、電子顯微鏡(SEM 和FIB-TEM)、拉曼光譜儀、X 光繞射儀、傅立葉轉換紅外線光譜儀與X 光光電子能譜儀分析在不同參數與不同加熱條件下之表面形貌、薄膜結構、官能基與元素之變化。由奈米壓痕試驗和刮痕實驗，比較不同前驅配方的薄膜硬度、結合強度以及摩擦係數，使用循環伏安法和電化學阻抗頻譜在人工體液中評估其抗腐蝕性。複合中間層與底材，及包含外層含氟類鑽碳膜的綜合性能與界面材質關係是本計畫的探討重點。希望能透過本研究可以提供改善這種材料在生醫植入物之運用時的最佳製程方法，以解決現有被覆類鑽碳之鈦合金植入物所發現的臨床問題。" "This project investigates the adhesion and anticorrosion performances of the fluorinated DLC-coated Ti6Al4V substrates with an interlayer which is built by a sol-gel process. Composites interlayers (CIs), majorly combinations of amorphous TiO2 and SiO2, are to be coated by dip coating and the related sol-gel process as composite interlayer with oxidation and corrosion resistance. The outmost functional DLC were deposited by a radio frequency plasma enhanced chemical vapor deposition (RF-PECVD) reactor, using CH4/CF4 mixtures under various pressures. Layers’ morphology, microstructures, morphologies and composition of the resulting films will be analyzed by means of atomic force microscope, electron microscopies (SEM and FIB-TEM), atomic force microscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transformation inferred spectroscopy. The mechanical properties of coatings will be examined by nano-indentation and nano-scratch test. The corrosion behavior was studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in a simulated physiological solution. The anti-corrosion capability and toughness of the F-DLC/CIs/Ti6Al4V combinations are hopefully to be a biomedical solution to the clinical problems which were reported in these years."

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Corrosion Resistance and Adhesion Strength of a Dlc-Coated Bio-Medical Ti Alloy with an Interlayer of Ti/Si Hybrid Oxides

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