Abstract
Biomaterials used as loading-bearing orthopedic implants usually require various excellent properties such as mechanical, bioactive and bio-tribological performances. Moreover, all of the orthopedic applications feature stress concentrations (notch sensitivity) in their design. In the present work, hydroxyapatite-reinforced polyetheretherketone functional gradient biocomposites (HA/PEEK FGBm) were successfully prepared by the layer stacking method combined with hot pressing molding technology. The effects of notch geometry on the stress-strain behavior of HA/PEEK FGBm were evaluated. The fracture morphology was investigated by scanning electron microscopy (SEM). The study of the stress-strain behavior indicated that the tensile and flexural stresses of HA/PEEK FGBm linearly increased with increasing strain under all the notch sensitivities. The fracture strain of the biocomposites decreased with increasing stress concentration factor and total HA content in the functional biocomposites. Moreover, the tensile and flexural strengths of HA/PEEK FGBm were lower than those of homogeneous HA/PEEK biocomposites. The SEM observation of the fracture micro-morphology showed that the fracture mechanism of HA/PEEK FGBm was gradually controlled by the brittle fracture process. Furthermore, both the tensile and the flexural strengths of HA/PEEK FGBm decreased with the increase in stress concentration factor and total HA content in the biocomposites.
Acknowledgments
This research was supported by the National Natural Science Foundation of China (grant no. 51175004).
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©2016 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original articles
- Preparation and characterization of graphene oxide/PMMA nanocomposites with amino-terminated vinyl polydimethylsiloxane phase interfaces
- Effect of exfoliated graphite nanoplatelets on thermal and heat deflection properties of kenaf polypropylene hybrid nanocomposites
- Synthesis of spherical porous cross-linked glutaraldehyde/poly(vinyl alcohol) hydrogels
- Influence of process parameters on property of PP/EPDM blends prepared by a novel vane extruder
- Influence of processing conditions on heat sealing behavior and resultant heat seal strength for peelable heat sealing of multilayered polyethylene films
- Thermal degradation kinetics and lifetime of HDPE/PLLA/pro-oxidant blends
- Effect of notch sensitivity on the mechanical properties of HA/PEEK functional gradient biocomposites
- The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
- Experimental analysis of resin infusion in air cushion method
- 3D-MID manufacturing via laser direct structuring with nanosecond laser pulses
Articles in the same Issue
- Frontmatter
- Original articles
- Preparation and characterization of graphene oxide/PMMA nanocomposites with amino-terminated vinyl polydimethylsiloxane phase interfaces
- Effect of exfoliated graphite nanoplatelets on thermal and heat deflection properties of kenaf polypropylene hybrid nanocomposites
- Synthesis of spherical porous cross-linked glutaraldehyde/poly(vinyl alcohol) hydrogels
- Influence of process parameters on property of PP/EPDM blends prepared by a novel vane extruder
- Influence of processing conditions on heat sealing behavior and resultant heat seal strength for peelable heat sealing of multilayered polyethylene films
- Thermal degradation kinetics and lifetime of HDPE/PLLA/pro-oxidant blends
- Effect of notch sensitivity on the mechanical properties of HA/PEEK functional gradient biocomposites
- The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
- Experimental analysis of resin infusion in air cushion method
- 3D-MID manufacturing via laser direct structuring with nanosecond laser pulses