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Mechanical Properties of Porous Titanium Compacts Reinforced by UHMWPE

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Abstract:

Porous Ti compacts reinforced by ultra-high molecular weight polyethylene (UHMWPE) were fabricated and their mechanical properties were evaluated. Ti powder atomized by plasma rotating electrode process (PREP) was sintered at temperatures ranging from 1473 K to 1673 K for 7.2 ks in a vacuum. The porous Ti compacts contain the porosity of about 40%, irrespective of the sintering temperature. Porous Ti/UHMWPE composites were successfully fabricated by compressing UHMWPE powder into the porous Ti compacts. The compacts exhibit open pore structure and enables the penetration of UHMWPE into pores in the compacts. Young’s modulus of the composites is higher than that of the porous Ti compacts. The increment in Young’s modulus is not simply explained by the rule of mixture because Young’s modulus of the UHMWPE is approximately 1.3 GPa. Three-point bending strength of the composites is improved, presumably due to the local stress relief by UHMWPE in the vicinity of neck in the composites.

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Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

1033-1037

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.1033

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Online since:

March 2007

Authors:

Naoyuki Nomura, Y. Baba, A. Kawamura, S. Fujinuma, Akihiko Chiba, Naoya Masahashi, Shuji Hanada

Keywords:

Bend Strength, Porous Ti / UHMWPE Composite, Porous Titanium, Young's Modulus

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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