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Vol.47, No.8, 508 ~ 516, 2009
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| Title |
| Fabrication and Properties of Ti-HA Composites Produced by Pulsed Current Activated Sintering for Biomaterials |
| 우기도 Kee Do Woo , 강덕수 Duck Soo Kang , 권의표 Eui Pyo Kwon , 문민석 Min Seok Moon , 손인진 In Jin Shon , Zhi Guang Liu |
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| Abstract |
| Ti-6Al-4V biomaterial is widely used as a bone alternative. However, Ti-6Al-4V ELI alloy suffers from numerous problems such as a high elastic modulus and high toxicity. Therefore, non-toxic biomaterials with low elastic moduli need to be developed. Ti-HA(hydroxyapatite) composites were fabricated in the present work by pulsed current activated sintering (PCAS) at 1000℃ under 60 MPa using mixed Ti and HA powders. The effects of HA content on the physical and mechanical properties of the sintered Ti-HA composites have been investigated. X-ray diffraction(XRD) analysis of the Ti-HA composites, including Ti-40 wt%HA in particular, revealed new phases, Ti2O, CaO, CaTiO3, and TixPy, formed by chemical reactions between Ti and HA during sintering. The hardness of the Ti-HA composites decreased with an increase in HA content. The corrosion resistance of these composites was observed to be an excellent candidate as a commercial Ti-6Al-4 V ELI alloy. A Ti-5 wt%HA composite fabricated by PCAS is recommended as a new biomaterial, because it offers good corrosion resistance, compressive strength, wear resistance, and biocompatibility, and a low Young`s modulus. |
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| Key Words |
| biomaterial, Ti-HA composite, powder metallurgy, PCAS, hydoxyapatite |
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