科研之友
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摘要
Samples with 40% vol. of pores and a pore size distribution between 100 and 500 mu m were produced by powder metallurgy from Ti6Al4V alloy powders. Sintering was performed at 1300 degrees C during one hour in an inert Argon atmosphere in a vertical dilatometer. The compressive strength and the porosity of these samples was investigated before and after compression tests through X-ray microtomography. The values of the elastic modulus (8GPa) and yield strength (80MPa) are within the range of those used in bone implants. Porosity leads to greater deformation whereas fracture of compacts occurs perpendicularly to the applied load. It was determined that the origin of the failure is generated by rupture of interparticle necks and, large pores enhance the propagation of cracks.
- 出版日期2017-12
