Fabrication and Microstructure Characteristics of Sintered Porous Biomaterial Based on Titanium Alloy for Orthopedic Applications
Currently,titanium and its alloys (Ti-6Al-4V or Ti13Nb-13Zr) are one of the basic metallic materials, which are used as biomaterials in orthopedics. Research under their best corrosion and wear resistance, biocompatibility and bioactivity are still being conducted. Orthopedic implants continue to pose a big problem because of their mechanical properties are too high in relation to the properties of human bones, for example Youngs modulus. Youngs modulus of bone is between 10-30 GPa and the solid metals is placed between 110 GPa for Ti and 230 GPa for Co-Cr alloys. Nowadays,many researches is focused on the design,manufacturing and characterisation of the porous materials based on e. g. Ti-6A1-4V or Ti13Nb-13Zr alloys,which would be applied for implants. Currently,there are several known methods of producing porous materials. The most common methods include: the powder metallurgy,conventional or with an use of space holders (removed by temperature or chemical treatment) .plasma spraying,laser remelting,rapid prototyping,metal foam manufacturing or heat and chemical treatments. The aim of this work was to conduct the powder preparation, pressing and sintering by conventional or with space holders processes in order to obtain the porous structure material made of the Ti-13Nb-13Zr alloy. In this paper, the size and shape of the Ti-13Nb-13Zr alloy powders obtained by machining and plasma atomization processes are presented. The pressing parameters, type of space holders,in that mainly unit pressure as well as temperature and time of the sintering processes are described. The investigation results of the microstructure morphology, pore size and porosity, in dependence of the selected type space holders,pressing and sintering parameters are shown and discussed. It is expected, that the porous material with defined porosity made of the Ti-13Nb13Zr alloy and its applications for orthopedic applications allows obtaining their high biocompatibility and bioactivity as well as cause an increase wear and corrosion resistance in contact with human body.
Titanium alloy (Ti alloy ) implants porous materials biocompatibility
Waldemar Serbinski Tomasz Seramak Sylwia Sobieszczyk Andrzej Zielinski
Gdansk University of Technology,Faculty of Mechanical Engineering,G. Narutowicza Str. 11/12,80-233 Gdansk,Poland
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
614-619
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）