以鐵基金屬玻璃複材或金屬玻璃鍍膜製作手術用取皮刀並進行模擬切削性能之研究;The study on simulated cutting performance of surgical skin-grafting blades made by Febased bulk metallic glass composites or coated with Fe-based metallic glass thin film

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Title:	以鐵基金屬玻璃複材或金屬玻璃鍍膜製作手術用取皮刀並進行模擬切削性能之研究;The study on simulated cutting performance of surgical skin-grafting blades made by Febased bulk metallic glass composites or coated with Fe-based metallic glass thin film
Authors:	陳致宇;Chen,Chih-Yu
Contributors:	機械工程學系
Keywords:	鐵基非晶質複合材料;破裂韌性;手術用取皮刀;Bulk amorphous steel composites (BASCs);Fracture toughness;Skin grafting blade
Date:	2015-07-13
Issue Date:	2015-09-23 14:47:18 (UTC+8)
Publisher:	國立中央大學
Abstract:	鐵基非晶質合金又稱於非晶質鋼材(Bulk Amorphous Steel, BAS)，具有優良玻璃形成能力、高強度、高硬度、耐磨耗以及良好耐腐蝕特性，相較於其他金屬玻璃，如鋯基、鈦基等，鐵基非晶質合金擁有更高機械強度且低製備成本，但由於其韌性較低，在應用上仍有限制。本研究以Fe-Cr-Mo-C-B-Y-Co 為主要成分，根據金屬玻璃形成之三大準則及微量添加法，選擇添加不同原子百分比延性金屬:鉭(Ta)配製出系列合金，並以真空吸鑄法製做出直徑2~4 mm 的非晶質複合棒材，在冷卻時碳化鉭析出成為非晶質合金內的第二相，使得鐵基非晶質合金之整體韌性獲得改善，其破裂韌性數值有效提升至10.2 ± 0.9 MPa∙m^1⁄2，相較於未添加延性顆粒之基材有顯著提升(5.13 ± 0.9 MPa∙m1⁄2)，並以此複材製作取皮刀刀片進行刀具銳利度分析。同時，本研究也以直流磁控濺鍍法鍍覆鐵基金屬玻璃薄膜在取皮刀刀片上，透過取皮模擬測試以及BSI測試刀片切削性能。經過15 cm取皮測試後，鐵基金屬玻璃複材取皮刀、鐵基非晶質鍍膜300 nm、400 nm膜厚取皮刀、商用取皮刀的刀具銳利指標(BSI)數值分別提高至0.35、0.49、0.49、0.53，由此驗證出鐵基金屬玻璃複材取皮刀耐磨耗能力佳，經取皮測試後仍保有優良的切割能力。;Fe-based amorphous alloys, also known as, bulk amorphous steel (BAS), exhibit not only impressive mechanical properties such as high hardness and compressive strengths but also good anti-corrosion and wear resistance. In this study, several BASs are made of cast iron which reduced the manufacture cost.However, all these BAS materials are extremely brittle and strongly restrict their applications as engineering or structure materials. The purpose of this study is to enhance the fracture toughness by dispersion strengthening method.. A series of Fe-Cr-Mo-C-B-Co-Y-Ta bulk amorphous steel composites (BASCs) were successfully fabricated by suction casting.X-ray diffraction(XRD) and differential scanning calorimetry(DSC) are conducted to examine the amorphous structure of these BASCs. Indentation testing and ultrasonic echography were applied to characterize the mechanical properties of these BASCs. The results show that all Fe-based BASCs present much higher fracture toughness (10.2±0.9 MPa∙m1/2) than the based one (5.13±0.9 MPa∙m^1/2). The Fe-based BASC further processed into a surgical skin-grafting blade as well as the sputter target to deposit thin film amorphous steel (TFAS) for the investigation of initial grafting ability and durability performance of 15 cmgrafting path in comparison with commercial one. Both Fe-based BASC and Fe-based TFAS blades exhibited much lower cutting energy than the commercial one. After 15cm skin-grafting test, the BSI value of BASC and TFAS skin-grafting blade still remain under blunt level (BSI<0.5), where the commercial one is increased from 0.35 to 0.53, which is considered as a blunt blade.
Appears in Collections:	[Graduate Institute of Mechanical Engineering] Electronic Thesis & Dissertation

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