光碟片抗刮層之奈米機械性質

奈米機械性質和奈米摩擦學特性是奈米尺度中發展表面現象和界面現象基本需要的研究。而奈米壓痕試驗及奈米刮痕試驗為目前量測材料奈米機械性質最普遍之檢測技術之ㄧ。本研究中"Hard Coat"材料為一獨家研發之超硬保護層，應用於DVD光碟片上以保護燒錄面防止刮傷、塵垢和油漬。在奈米壓痕實驗中，本研究之三種試片使用Berkovich壓針去量測出奈米硬度和彈性模數。而在奈米刮痕試驗中，本研究之三種試片是使用Conical壓針來量測摩擦係數。而試片之殘留深度是由掃描探針顯微鏡所即時量測而得的。本實驗使用一般DVD-RW光碟片編號為Substrate (polycarbonate, PC)，及二種超硬保護層DVD-RW光碟片編號為SHC (Super Hard Coating)、HC (Hard Coating)共三種試片。本文藉由奈米壓痕儀及奈米刮痕儀，探討此三種試片之機械性質與抵抗磨耗的能力，包括硬度、楊氏係數、潛變、回彈能力、殘留深度及摩擦係數等數據。從奈米壓痕實驗中，可得知SHC硬度及回彈能力大於HC及PC；SHC、HC、PC在載荷為1300μN時之硬度分別為0.85、0.38、0.25GPa。而從奈米刮痕實驗中可發現SHC的摩擦係數及殘留深度為最小，其摩擦係數為0.2，是PC摩擦係數的一半。顯示出SHC Coating抗磨耗能力及抗塑變能力最好。

關鍵字

聚碳酸酯樹脂基板；奈米刮痕；壓痕硬度；鍍硬面光碟片；奈米壓痕；壓痕模數；奈米磨耗

並列摘要

The study of nanomechanical and nanotribological properties is needed to develop fundamental understanding of surface and interfacial phenomena on the nano scale. Nanoindentation and nanoscratch test is one of the most popular techniques to measure the mechanical properties of the nano-structures. A proprietary hard-coat technology that protects against scratches has been applied on the surface of DVD-RW disc. The disc substrate (polycarbonate, PC) and two kinds of coatings, designated as SHC and HC, are explored in this study. Indentation, scratching properties of these three specimens such as hardness, Young’s modulus, creep, resilience, residual depth and coefficient of friction were evaluated. The nanohardness and elastic modulus of the three specimens against a berkovich diamond tip were evaluated with the nanoindentation method. Coefficient of friction of the three specimens against a conical diamond tip was also determined with the nanoscratch method. Residual depths of the specimens were examined by a scanning probe microscope (SPM). In indentation tests, it was found that the SHC exhibited the highest nanohardness and resilience, which the nanohardness of SHC, HC, substrate were 0.85GPa, 0.38Gpa and 0.25 GPa respectively under 1300μN loads. SHC had better resilience value. In scratch tests, SHC had the lowest residual depths and coefficient of friction. The coefficient of friction of SHC is 0.2 which is half of substrate. SHC showed better mechanical properties with more nanowear resistance and good anti-plastic deformation ability.

並列關鍵字

indentation hardness ； polycarbonate substrate ； hard coating disc ； nanowear ； indentation modulus ； nanoscratch ； nanoindentation

參考文獻

[4] Feynman, R. P., "There’s Plenty of Room at the Bottom," Engineering and Science, 1959.

[5] Binnig, G., Rohrer, H., Gerber, C., Weibel, E., "Tunneling Through a Controllable Vacuum Gap," Applied Physics Letters, Vol. 40(2), pp. 178-180, 1982.

[6] Pharr, G.M. and Olive, W.C., 1992, An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments, Journal of Materials Research 7, No. 6, pp.1564-1583.

[8] Stillwell, N. A., Tabor, D., "Elastic Recovery of Conical Indentation," Proceedings of the Physical Society, Vol. 78(2), pp. 169-179, 1961.

[9] Sneddon, I. N., "The Relation Between Load and Penetration in the Axisymmetric Boussinesq Problem for a Punch of Arbitrary Profile," International Journal of Engineering Science, Vol. 3,

國際替代計量

光碟片抗刮層之奈米機械性質

全文下載

主題瀏覽