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Effects of Diamond-like Carbon Coatings with Different Thickness on Mechanical Properties and Corrosion Behavior of Biomedical NiTi Alloy
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Effects of Diamond-like Carbon Coatings with Different Thickness on Mechanical Properties and Corrosion Behavior of Biomedical NiTi Alloy
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Joint Project of Guangdong Province and Ministry of Education of China (2007A090302087); City University of Hong Kong Applied Research Grant (ARG) (9667028)

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    摘要:

    采用電弧增強(qiáng)磁控濺射技術(shù)在生物醫(yī)用NiTi合金表面沉積253~1880 nm厚的類金剛石涂層。用輪廓儀、劃擦儀、摩擦磨損儀和電化學(xué)工作站等檢測涂層的力學(xué)性能和腐蝕行為。結(jié)果發(fā)現(xiàn)，厚度在700 ~1000 nm之間的涂層具有較低的殘余應(yīng)力、較高的膜基結(jié)合力、長的磨損壽命和良好的耐腐蝕性。因此，更適合于作為生物醫(yī)用NiTi合金的保護(hù)性涂層，同時(shí)也對(duì)NiTi合金表面類金剛石涂層的厚度對(duì)其力學(xué)性能和腐蝕行為的影響機(jī)制進(jìn)行探討。

    Abstract:

    Diamond-like carbon (DLC) coatings with the thickness between 253-1880 nm were prepared on NiTi alloy by arc enhanced magnetron sputtering (AEMS). Surface profilometry, scratch tests, tribometry, and electrochemical tests were conducted to determine the mechanical properties and the corrosion behavior of the DLC-coated NiTi alloy, and it is found that DLC coatings with thickness between 700 and 1000 nm have moderate residual stress, high critical load, long wear life and good corrosion resistance. So DLC coatings with thickness between 700 and 1000 nm are suitable for improving the mechanical properties and corrosion resistance of biomedical NiTi alloy. The associated mechanisms were also discussed in detail.

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杭瑞強(qiáng),馬勝利,Paul K. Chu. Effects of Diamond-like Carbon Coatings with Different Thickness on Mechanical Properties and Corrosion Behavior of Biomedical NiTi Alloy[J].稀有金屬材料與工程,2012,41(9):1505~1510.[Hang Ruiqiang, Ma Shengli, Chu K. Paul. Effects of Diamond-like Carbon Coatings with Different Thickness on Mechanical Properties and Corrosion Behavior of Biomedical NiTi Alloy[J]. Rare Metal Materials and Engineering,2012,41(9):1505~1510.]
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  • 收稿日期:2011-09-10
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