鋁合金(6061 aluminum alloy)擁有相當良好的潛力做為生醫手術之材料，因為其良好的特性，例如:低比重、高強度以及價格便宜，適合做為目前手術刀之材料替代品，但唯一考量的問題是鋁合金的表面粗糙度過高，若用於醫療方面容易有細菌沾染等問題，因此，表面改質是解決此問題的辦法。在本實驗當中，我們利用濺鍍類鑽碳(DLC)薄膜於鋁合金上，考量類鑽碳其優異的特點，例如:高強度、低摩擦係數；良好的生物相容性及抗菌性，因此，披覆類鑽碳於鋁合金上可改善原本所提及的問題。然而，沉積類鑽碳於基板時所遭遇的問題為附著度不足，因薄膜在濺鍍過程中易產生殘留應力，以及薄膜與基板之間的熱膨脹係數差異，造成接合性不佳。為了解決此問題，我們在類鑽碳與鋁合金基板之間，利用旋轉塗佈SiO2/TiO2溶膠凝膠溶液，以一層薄膜作為中間層，期望此複合材料能夠改善附著度的問題。
在本研究中，我們利用ATR-IR、SEM、Raman及XPS去分析此複合材料DLC/SiO2-TiO2/Al alloy之微觀結構及表面性質，以及利用奈米壓痕儀、表面粗度儀以及刮痕試驗儀去檢測其機械性質，最後利用JIS Z 2801-2000抗菌檢測法來測試其抗菌表現。透過以上之材料分析，冀望此複合材料能改善附著度問題外，在醫用抗菌方面也能達到標準，使其能夠成為微創手術器材之材料替代品。

Due to a low specific gravity, good mechanically, and high strength, aluminum alloys are attractive for using in various surgical devices. However, the bio-compatibility is a concern. Also, a smooth surface and a low friction coefficient are often required. Hence, in this work, sputter deposited diamond-like carbon (DLC) coating on Al alloy has investigated to provide desirable surface characteristics for Al alloy. However, the adhesion between DLC and Al is not trivial. Therefore, a sol-gel process was used to deposit an interlayer of silicon oxide film to improve the adhesion and thus wear resistance performances of the Al alloy. Structural and mechanical properties of the DLC/SiO2-TiO2/Al were examined using of Raman spectroscopy, Fourier transforms infrared spectroscopy, scanning electron microscopy, scratch test, and nano-indentation methods. The results show that DLC film provides a low friction coefficient and a high resistance to improve the mechanical properties. Coating of the SiO2-TiO2 interlayer also shows a significant enhancement of adhesion between DLC film and the Al alloy. The research demonstrates a promising candidate DLC/ SiO2-TiO2/Al material for use in surgical devices.

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