Designing of the toxic element-free Ti-based amorphous alloy for biomedical implants

• Main Authors: Hung-Cheng Lin, 林泓成
• Other Authors: Jason Shian Ching jang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/91561124904258558780

碩士 === 國立中央大學 === 材料科學與工程研究所 === 101 === A series of toxic element-free Ti-Zr-Ta-Si amorphous alloy ribbons have been successfully prepared by melt-spinning method. The differential scanning calorimetry (DSC), X-ray diffraction analysis, bending test, and microhardness test are conducted for studying the thermal and mechanical properties of these alloy ribbons. The results show that the highest value (80 K) of supercooled liquid region (SCL, SCL= Tx - Tg , glass transition temperature (Tg) and crystallization temperature (Tx) are 693 and 773 K, respectively) occurs at the composition of Ti42Zr40Ta3Si15. In addition, this amorphous alloy exhibits the best thermal stability during isothermal annealing at the middle temperature of its SCL. Moreover, the Ti42Zr40Ta3Si15 amorphous alloy ribbon presents excellent ductility by bending test, without fracture and no crack after bending over 180 degree. Therefore, the composition of Ti42Zr40Ta3Si15 is believed to be a promising based alloy for fabricating the porous metallic glass in the application of biomedical implant.