Strengthening mechanisms in carbon nanotube reinforced bioglass composites

2012, Volume 6, Issue 2

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Frontiers of Chemical Science and Engineering >> 2012, Volume 6, Issue 2 doi: 10.1007/s11705-012-1279-0

Strengthening mechanisms in carbon nanotube reinforced bioglass composites

1. Department of Mechanical Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA; 2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; 3. Department of Mechanical Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA

Available online: 2012-06-05

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Abstract

Carbon nanotube reinforced bioglass composites have been successfully synthesized by two comparative sintering techniques, i.e., spark plasma sintering (SPS) and conventional compaction and sinteirng. The composites show improved mechanical properties, with SPS technique substantially better than conventional compact and sintering approach. Using SPS, compared with the 45S5Bioglass matrix, the maximum flexural strength and fracture toughness increased by 159% and 105%, respectively. Enhanced strength and toughness are attributed to the interfacial bonding and bridging effects between the carbon nanotubes and bioglass powders during crack propagations.

Keywords

45S5Bioglass ; multi-wall carbon nanotubes ; biocomposite ; mechanical properties ; sintering

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