| Title |
Fabrication and Properties of Ti-HA Composites Produced by Pulsed Current Activated Sintering for Biomaterials |
| Authors |
우기도(Kee Do Woo); 강덕수(Duck Soo Kang); 권의표(Eui Pyo Kwon); 문민석(Min Seok Moon); 손인진(In Jin Shon); (Zhi Guang Liu) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
biomaterial; Ti-HA composite; powder metallurgy; PCAS; hydoxyapatite |
| 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. |