http://repository.iitr.ac.in/handle/123456789/12623| Title: | Boron nitride nanotube reinforced hydroxyapatite composite: Mechanical and tribological performance and in-vitro biocompatibility to osteoblasts |
| Authors: | Lahiri, Debrupa Singh V. Benaduce A.P. Seal S. Kos L. Agarwal A. |
| Published in: | Journal of the Mechanical Behavior of Biomedical Materials |
| Abstract: | This study proposes boron nitride nanotube (BNNT) reinforced hydroxyapatite (HA) as a novel composite material for orthopedic implant applications. The spark plasma sintered (SPS) composite structure shows higher density compared to HA. Minimal lattice mismatch between HA and BNNT leads to coherent bonding and strong interface. HA-4 wt% BNNT composite offers excellent mechanical properties-120% increment in elastic modulus, 129% higher hardness and 86% more fracture toughness, as compared to HA. Improvements in the hardness and fracture toughness are related to grain refinement and crack bridging by BNNTs. HA-BNNT composite also shows 75% improvement in the wear resistance. The wear morphology suggests localized plastic deformation supported by the sliding of outer walls of BNNT. Osteoblast proliferation and cell viability show no adverse effect of BNNT addition. HA-BNNT composite is, thus, envisioned as a potential material for stronger orthopedic implants. © 2010 Elsevier Ltd. |
| Citation: | Journal of the Mechanical Behavior of Biomedical Materials (2011), 4(1): 44-56 |
| URI: | https://doi.org/10.1016/j.jmbbm.2010.09.005 http://repository.iitr.ac.in/handle/123456789/12623 |
| Issue Date: | 2011 |
| ISSN: | 17516161 |
| Author Scopus IDs: | 26326345700 55204645700 36636862400 7102592430 7004015655 7401480913 |
| Author Affiliations: | Lahiri, D., Nanomechanics and Nanotribology Lab and High Temperature Tribology Lab, Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States Singh, V., AMPAC and Nanoscience Technology Center, University of Central Florida, AMPAC, 4000 Central FL Blvd, Orlando 32816, United States Benaduce, A.P., Department of Biological Sciences, Florida International University, Miami, FL 33174, United States Seal, S., AMPAC and Nanoscience Technology Center, University of Central Florida, AMPAC, 4000 Central FL Blvd, Orlando 32816, United States Kos, L., Department of Biological Sciences, Florida International University, Miami, FL 33174, United States Agarwal, A., Nanomechanics and Nanotribology Lab and High Temperature Tribology Lab, Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States |
| Funding Details: | The authors acknowledge support from the research facility at Advanced Materials Engineering and Research Institute (AMERI) in Florida International University and Mr. Neal Ricks, manager, AMERI. The authors are also thankful to the Center for study of Matters in Extreme Conditions (CeSMEC) and Prof. S. Saxena for extending the use of Micro-Raman Spectroscopy facility for research purpose. A.A. acknowledges funding from the National Science Foundation CAREER Award ( NSF-DMI-0547178 ), Office of Naval Research ( N00014-08-1-0494 ) and DURIP program ( N00014-06-0675 ). D.L acknowledges support from Dissertation Evidence Acquisition Fellowship by University Graduate School of Florida International University. Appendix |
| Corresponding Author: | Agarwal, A.; Nanomechanics and Nanotribology Lab and High Temperature Tribology Lab, Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States; email: agarwala@fiu.edu |
| Appears in Collections: | Journal Publications [MT] |
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