Abstract
Microstructures and mechanical properties ofporosity-graded Ti compacts were investigated in this study. To f the porositygraded compacts, Ti powders with three different particle sizes, 65, 189 and 374 mm were prepared by the plasma rotating electrode process (PREP) and the gas atomization process, and these powders were sintered with and without applied stress. Porosity and pore size ofporositygraded Ti compacts decrease significantly with decreasing initial powder size and by applying stress. The most porous layer (374 mm) is severely deformed in compression tests compared to other layers. The compressive strength of porosity graded-compacts is found to be in fairly good agreement with the strength ofmost porous layer. Bend strength ofcompact sintered at 1223 K and 1 MPa (223.3 MPa) shows a higher value than that ofhuman bone (156.9 MPa).
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