鋯基金屬玻璃具有優良的機械性質、抗蝕性與抗菌性，以塊材或是鍍膜形式應用於手術刀具上對銳利度提升有優異的表現。本研究將針對鋯基塊狀金屬玻璃與鋯基金屬玻璃鍍膜手術刀進行多次切削實驗，並與商用手術刀進行刀具切削耐久度之探討。 本研究針對Zr-Cu-Al-Ag-Si與Zr-Cu-Ni-Al-Si之合金製成之塊狀金屬玻璃手術刀以及不同膜厚(200 nm-500 nm)之金屬玻璃鍍膜手術刀進行測試及分析。系列鋯基塊狀金屬玻璃與金屬玻璃鍍膜之手術刀刀鋒表面形貌與表面粗糙度經觀測皆較商用手術刀平整，其表面粗糙度可分別降低1/10與1/5以下。系列金屬玻璃塊材硬度皆超過540 Hv，其中以鋯基-48硬度最高(580 Hv)，雖不及商用手術刀(720 Hv)但仍具優異硬度。金屬玻璃鍍膜手術刀之薄膜附著力皆大於50 N，鋯基-53在膜厚500 nm下甚至高達98 N。 切削實驗選用刀鋒銳利指數(Blade Sharpness Index，BSI)作為銳利度差異之評估，此值越小代表銳利度越高。切削實驗結果顯示，系列鋯基塊狀與金屬玻璃鍍膜手術刀之原始銳利度皆高於商用手術刀，提升率皆超過20%。於20 cm切割長度後，商用手術刀之BSI為0.485，已越過0.45之鈍化標準；而同樣距離下系列鋯基塊狀金屬玻璃手術刀中以鋯基-48材質具最佳銳利度，其BSI為0.419；系列鋯基金屬玻璃鍍膜手術刀中在膜厚300 nm下保有最佳銳利度，以鋯基-48與鋯基-53之BSI分別為0.429與0.416；經切割試驗20 cm後，無論是塊狀或金屬玻璃鍍膜手術刀之銳利度維持在鈍化標準以內，表示具有較商用手術刀更優異之刀鋒耐久度。鋯基金屬玻璃手術刀耐久度提升將使手術過後具有更平整之刀疤與更迅速的復原速度。 Zr-based metallic glass is a promising material for medical tools due to its excellent mechanical properties, good corrosion resistance and anti-bacterial ability. According to previous research results, bulk metallic glass (BMG) blade and metallic glass thin film (MGTF) coated blade possess better blade sharpness index (BSI) than commercial surgical blade. In this study, the BMG blades and commercial blades coated with 200-500 nm thickness of Zr-Cu-Al-Ag-Si and Zr-Cu-Ni-Al-Si MGTF were fabricated and investigated. The amorphous states of all BMGs and MGTF blades were ascertained by XRD and GIXRD. BMG blades own smoother surface than MGTF blades and commercial one which indicates smaller friction force during cutting process. The mechanical properties of BMG blade and MGTF coatings were characterized by micro-Vickers, nano-indentation and scratch test. Results of sharpness test in the beginning reveal that both BMG-made and MGTF-coated blades possess smaller BSI value than commercial one. The cutting durability of the BMG-made, MGTF-coated, and commercial blades was evaluated by the value variation of BSI by 25 cm cutting test. The commercial blade was blunted (BSI=0.485) after 20 cm cutting path. Conversely, the smallest BSI value of 0.419 occurs at Zr48-based BMG-made blade after 20 cm cutting path. In addition, The 300 nm-thicknesses MGTF-coated blade presents the smallest BSI value after 20 cm cutting path in comparison with other thicknesses MGTF-coated blades and commercial blade. The blade cutting durability can be significant improved by BMG-made and MGTF-coated blades, both of these two kinds of blade can keep the BSI value less than 0.45 after 20 cm cutting test.
