Abstract
The low elastic modulus titanium alloy used for implant has been investigated, and the conflicting problem of strength and porosity has been challenged. Manufacturing of porous material by capsule-free hot isostatic pressing (HIP) can be expected for simultaneous control of porosity and mechanical strength. In this study, commercial pure titanium powders were sieved below 150μm and 106μm, and the sieved powders were compacted by hydraulic hand operated pressing machine. Then, the compacts were sintered by electric furnace under atmospheric pressure argon gas at 823K, and finally capsule-free HIPed under high-pressure argon gas (150MPa) at 1523K. Results showed that the HIPed compacts maintained pores sufficiently, and the character was affected by compaction load. The aspect of pore forming was, however, considered to be different in the surface and the inside.
