Ti/SiO2 composite fabricated by powder metallurgy for orthopedic implant |
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| Affiliation: | 1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;2. Institute for Frontier Materials, Deakin University, Geelong, Victoria 3217, Australia;1. School of Mathematics and Computer Science, Zunyi Normal College, Zunyi 563002, China;2. School of Economics and Management, Tongji University, Shanghai 200092, China;3. College of Management, Shenzhen University, Shenzhen 518060, China;4. Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China;1. A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation;2. Novosibirsk State University, 630090 Novosibirsk, Russian Federation;3. Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russian Federation;1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. College of Management, Shenzhen University, Shenzhen 518060, China;1. Resident, Division of Foot and Ankle Surgery, Swedish Medical Center, Seattle, WA;2. Resident, Division of Foot and Ankle Surgery, Department of Orthopaedic Surgery, Carilion Roanoke Memorial Hospital, Roanoke, VA;3. Vascular Surgeon, Jefferson Surgical Clinic, Carilion Roanoke Memorial Hospital, Roanoke, VA;4. Assistant Professor, Co-Section Chief, Division of Foot and Ankle Surgery, Department of Orthopaedic Surgery, Virginia Tech Carilion School of Medicine, Roanoke, VA |
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| Abstract: | Titanium/silica (Ti/SiO2) composites are fabricated using powder metallurgy (P/M). Nanoscale biocompatible SiO2 particles are selected as reinforcement for the Ti/SiO2 composite to enhance its biocompatibility and strength, especially when with high porosity. Effects of the SiO2 particle addition and sintering temperature on mechanical properties of the Ti/SiO2 composites are investigated. The results indicate that the mechanical property of Ti/SiO2 composites sintered at 1100 °C are better than those at 900 and 1000 °C. The strength of the Ti/SiO2 composites is significantly higher than that of pure titanium. The composite with the SiO2 content of 2 wt% sintered at 1100 °C for 4 h shows an appropriate mechanical property with a relative density of 96.5%, a compressive strength of 1566 MPa and good plasticity (an ultimate strain of 15.96%). In vitro results reveal that the Ti/SiO2 composite possesses excellent biocompatibility and cell adhesion. Osteoblast-like cells grow and spread well on the surfaces of the Ti/SiO2 composites. The Ti/SiO2 composite is a promising material for great potential used as an orthopedic implant material. |
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