Abstract
Titanium and its alloys of low elastic modulus have been required as materials for the implants. Porous materials have been considered as a way to respond to the request, so the conflicting problem of mechanical strength and porosity has been challenged. By the way, production of porous materials by capsule-free hot isostatic pressing (HP) has been said to be able to control the porosity and mechanical strength simultaneously, hi this study, commercial titanium powders were compacted by several uniaxial loads (4.9-24.5 kN) in a die having a diameter of 15 mm, and the green compactions were sintered by a capsule-free HIP method under an argon gas atmosphere at a holding temperature of 1523 K, a holding time of 1 hour. Porosity of the sintered body was, however, not so high with an average relative density of 72 %. Results showed that characteristic improvement of porous titanium sintered compacts was expected by homogenization of the green compacts, optimization of the HIP pressure and so on.
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