Preparation and characterization of mechanical properties of carbon nanotube/45S5Bioglass composites for biologic applications

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2011-01, Vol.528 (3), p.1553-1557
• Main Authors: Jia, Zhizhong, Zhang, Jing, Jia, Chengchang, Nie, Junhui, Chu, Ke
• Format: Article
• Language: English
• Subjects: 45S5Bioglass; Carbon nanotubes; Condensed matter: structure, mechanical and thermal properties; Deformation and plasticity (including yield, ductility, and superplasticity); Exact sciences and technology; Flexural strength; Fracture toughness; Hardness; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties; Mechanical properties of solids; Modulus of rupture in bending; Multi wall carbon nanotubes; Physics; Powder processing; Spark plasma sintering
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2010.10.077

▶ Multi-wall carbon nanotube/45S5Bioglass® composites have been successfully synthesized. ▶ The composite was fabricated by mixing and spark plasma sintering (SPS). ▶ The mechanical properties of the composites, such as hardness, flexural strength, and fracture toughness, were measured. ▶ Compared with the 45S5Bioglass matrix, the hardness of composites decreased appreciably, while flexural strength and fracture toughness increased 159% and 105%, respectively. Multi-wall carbon nanotube/45S5Bioglass® composites have been successfully synthesized by means of a mechanical alloying process followed by spark plasma sintering (SPS). The mechanical properties of the composites, such as hardness, flexural strength, and fracture toughness, were measured. Experimental results show that the optimal processing parameters are wet mixing 10min followed by dry mixing 10min, at SPS temperature 850°C, pressure 40MPa, and holding time 10min. Composites sintered under these conditions showed maximum mechanical properties. Compared with the 45S5Bioglass matrix, the hardness of composites decreased appreciably, while flexural strength and fracture toughness increased 159% and 105%, respectively. Enhanced strength and toughness are attributed to the interfacial bonding mechanism between carbon nanotubes and bioglass powders during crack propagation.