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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.44  No.4 (2003)  >  pp.657-660

MATERIALS TRANSACTIONS
<<Previous article Vol.44  No.4 (2003)   pp.657 - 660 Next article>>

Microstructures and Mechanical Properties of Porosity-Graded Pure Titanium Compacts

Ik-Hyun Oh1), Haruhiko Segawa1), Naoyuki Nomura1) and Shuji Hanada1)
1) Institute for Materials Research, Tohoku University

Microstructures and mechanical properties of porosity-graded Ti compacts were investigated in this study. To fabricate the porosity-graded compacts, Ti powders with three different particle sizes, 65, 189 and 374 μm 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 of porosity-graded Ti compacts decrease significantly with decreasing initial powder size and by applying stress. The most porous layer (374 μm) 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 of most porous layer. Bend strength of compact sintered at 1223 K and 1 MPa (223.3 MPa) shows a higher value than that of human bone (156.9 MPa).


Keyword:
porosity graded, titanium powder sintering, porosity, pore size, 0.2% proof strength, bend strength

Received: December 05, 2002
Accepted: February 06, 2003 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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