A new TiCuHfSi bulk metallic glass with potential for biomedical applications |
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| Affiliation: | 1. Structural Nanomaterials laboratory, PSG Institute of Advanced studies, Coimbatore 641 004, India;2. Department of Metallurgical Engineering, PSG College of Technology, Coimbatore 641 004, India;3. Department of Applied Chemistry, PSG College of Technology Coimbatore 641 004, India;4. National Institute of Advanced Studies, Bangalore 560 012, India;1. Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC;2. Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan, ROC;3. Department of Materials and Optoelectronic Science, Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC;4. Institute of Materials Science and Engineering, Department of Mechanical Engineering, National Central University, Chung-Li, Taiwan, ROC;5. Department of Orthopedics, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung, Taiwan, ROC;6. Department of Orthopedics, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC;7. Orthopedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC;8. Institute for Advanced Study, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong |
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| Abstract: | A new Ti41.3Cu43.7Hf13.9Si1.1 bulk metallic glass (BMG), free of Ni, Al and Be elements, was designed using the proper mixing of binary deep eutectics. The alloy exhibited excellent glass forming ability (GFA) and could be cast into single glassy rod up to 3 mm in diameter by copper mould casting method. The appropriate atomic-size mismatch, the large negative heat of mixing among constituent elements, and the possible formation of glassy HfSiO4 facilitated its superior GFA. The BMG also showed good mechanical properties with fracture strength of 1685 MPa and Young’s modulus of 95 GPa as well as better corrosion resistance in both NaCl and Hank’s solutions, compared with pure Ti and Ti–6Al–4V alloy. The above results demonstrated that the developed BMG is promising in biomedical applications. |
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