Mechanical properties of glass-ceramic A-W-polyethylene composites: Effect of filler content and particle size

J. A. Juhasz, S. M. Best, R. Brooks, M. Kawashita, N. Miyata, T. Kokubo, T. Nakamura, W. Bonfield

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)

Abstract

Composites which comprise a bioactive filler and ductile polymer matrix are desirable as implant materials since both their biological and mechanical properties can be tailored for a given application. In the present study three-point bending was used to characterise biomedical materials composed of glass-ceramic apatite-wollastonite (A-W) particulate reinforced polyethylene (PE) (denoted as AWPEX). The effects of filler volume fraction, varied from 10 to 50vol%, and average particle size, 4.4 and 6.7μm, on the bending strength, yield strength, mode of fracture, Young's modulus and strain to failure were investigated. HAPEX™, a commercially used composite of hydroxyapatite and polyethylene, with a 40vol% filler content, was used for comparison. Increasing the filler content caused an increase in Young's modulus, yield strength and bending strength, and a decreased strain to failure. When filler particle size was increased, the Young's modulus, yield and bending strengths were found to be slightly reduced. A transition in fracture behaviour from ductile to brittle behaviour was observed in samples containing between 30 and 40vol% filler.

Original languageEnglish
Pages (from-to)949-955
Number of pages7
JournalBiomaterials
Volume25
Issue number6
DOIs
Publication statusPublished - 2004 Mar

Keywords

  • Composite
  • Glass-ceramic
  • Mechanical properties
  • Polyethylene

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

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