Fabrication and Evaluation of Drill Ability for the Orthopedic Drill Bits Made of Bulk Metallic Glasses and Composites

• Main Authors: Yao-Chih Liu, 劉耀之
• Other Authors: Jason Shian-Ching Jang
• Format: Others
• Language: en_US
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/19407309193716883203

碩士 === 國立中央大學 === 機械工程學系 === 102 === As the development of bulk metallic glasses (BMGs) and bulk metallic glass composites (BMGCs) grows, this study focus on the application as biomaterials. Three compositions: Zr48Cu35.3Al8Ag8Si0.7 with 10 vol. % ex-situ Ta powder, Ti40Zr10Cu36Pd14, and Zr53Cu30Al8Nb4.5Pd4.5 have been chosen. Choosing the Zr-based composite is due to its good glass forming ability (GFA), high thermal stability, and the enhance plasticity for better formability of machining. The Ti40Zr10Cu36Pd14 has relatively high specific strength, and great corrosion resistance. Zr53Cu30Al8Nb4.5Pd4.5 not only keeps the great GFA and thermal stability from Zr-based series, but also exclude the harmful element: Nickel which may cause irritation. In this study, the characteristic of BMGC properties has been characterized. Furthermore, the as-cast BMGC rods are also manufactured into orthopedic drill bits. A compression device by revers pulling is designed for the drilling test. Through the drill testing and morphology examination of the drill bits, the BMGC drill bits will compare with the commercial surgical drill bit to realize their difference. From the result we can find the surgical drill bit made by BMGC takes lower loading while drilling the real bone. The wear of BMG or BMGC materials is less, too. Though some of the hardness of BMG is lower than commercial martensitic stainless steel, the performance is still better.