Study of Mechanical and Tribological Properties of Nanomica Dispersed Hydroxyapatite Based Composites for Biomedical Applications
Present research aims to assess the influence of nanocrystalline mica (NM) dispersion (10, 15, 20, and 25 vol.%) in hydroxyapatite (HA) matrix on its mechanical and tribological properties and bioactivity. Nanosized mica (NM) was prepared by mechanical milling of commercial mica powder. The composit...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/9814624 |
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| author | Anumeha Mishra Nidhi Khobragade Koushik Sikdar Subhabrata Chakraborty Sashi Bhusan Kumar Debdas Roy |
| author_facet | Anumeha Mishra Nidhi Khobragade Koushik Sikdar Subhabrata Chakraborty Sashi Bhusan Kumar Debdas Roy |
| author_sort | Anumeha Mishra |
| collection | DOAJ |
| description | Present research aims to assess the influence of nanocrystalline mica (NM) dispersion (10, 15, 20, and 25 vol.%) in hydroxyapatite (HA) matrix on its mechanical and tribological properties and bioactivity. Nanosized mica (NM) was prepared by mechanical milling of commercial mica powder. The composite was prepared by mechanically mixing the milled mica with HA and consolidated by microwave sintering at 1200°C for 10 min. Phase characterization by X-ray diffraction (XRD) shows dissociation of HA into β-TCP (tetra calcium phosphate) in sintered compact. Estimated densification is the highest (~98%) with 20% NM addition. HA-20%NM also shows an optimum combination of mechanical (hardness 2.80 GPa and indentation fracture toughness 1.51 MPa m1/2) and tribological properties (wear rate ~1.6 × 10−6 mm3/Nm). Scanning electron microscopy (SEM) of worn out surface elicits that wear mechanism is governed mainly by delamination and abrasive mode. Biocompatibility assessment in simulated body fluid (SBF) indicates that no elemental change occurs (confirmed by energy dispersive spectroscopy (EDS)) even after 60 days of emersion. It reveals that the optimized composition is satisfying fundamental requirements of an implant material. |
| format | Article |
| id | doaj-art-b52139eaa9044fb3860bcadbb44584c1 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-b52139eaa9044fb3860bcadbb44584c12025-02-03T05:48:16ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/98146249814624Study of Mechanical and Tribological Properties of Nanomica Dispersed Hydroxyapatite Based Composites for Biomedical ApplicationsAnumeha Mishra0Nidhi Khobragade1Koushik Sikdar2Subhabrata Chakraborty3Sashi Bhusan Kumar4Debdas Roy5Department of Materials and Metallurgical Engineering, NIFFT, Ranchi 834003, IndiaDepartment of Materials and Metallurgical Engineering, NIFFT, Ranchi 834003, IndiaDepartment of Materials and Metallurgical Engineering, NIFFT, Ranchi 834003, IndiaDepartment of Chemical Engineering, NIT, Rourkela 769008, IndiaDepartment of Materials and Metallurgical Engineering, NIFFT, Ranchi 834003, IndiaDepartment of Materials and Metallurgical Engineering, NIFFT, Ranchi 834003, IndiaPresent research aims to assess the influence of nanocrystalline mica (NM) dispersion (10, 15, 20, and 25 vol.%) in hydroxyapatite (HA) matrix on its mechanical and tribological properties and bioactivity. Nanosized mica (NM) was prepared by mechanical milling of commercial mica powder. The composite was prepared by mechanically mixing the milled mica with HA and consolidated by microwave sintering at 1200°C for 10 min. Phase characterization by X-ray diffraction (XRD) shows dissociation of HA into β-TCP (tetra calcium phosphate) in sintered compact. Estimated densification is the highest (~98%) with 20% NM addition. HA-20%NM also shows an optimum combination of mechanical (hardness 2.80 GPa and indentation fracture toughness 1.51 MPa m1/2) and tribological properties (wear rate ~1.6 × 10−6 mm3/Nm). Scanning electron microscopy (SEM) of worn out surface elicits that wear mechanism is governed mainly by delamination and abrasive mode. Biocompatibility assessment in simulated body fluid (SBF) indicates that no elemental change occurs (confirmed by energy dispersive spectroscopy (EDS)) even after 60 days of emersion. It reveals that the optimized composition is satisfying fundamental requirements of an implant material.http://dx.doi.org/10.1155/2017/9814624 |
| spellingShingle | Anumeha Mishra Nidhi Khobragade Koushik Sikdar Subhabrata Chakraborty Sashi Bhusan Kumar Debdas Roy Study of Mechanical and Tribological Properties of Nanomica Dispersed Hydroxyapatite Based Composites for Biomedical Applications Advances in Materials Science and Engineering |
| title | Study of Mechanical and Tribological Properties of Nanomica Dispersed Hydroxyapatite Based Composites for Biomedical Applications |
| title_full | Study of Mechanical and Tribological Properties of Nanomica Dispersed Hydroxyapatite Based Composites for Biomedical Applications |
| title_fullStr | Study of Mechanical and Tribological Properties of Nanomica Dispersed Hydroxyapatite Based Composites for Biomedical Applications |
| title_full_unstemmed | Study of Mechanical and Tribological Properties of Nanomica Dispersed Hydroxyapatite Based Composites for Biomedical Applications |
| title_short | Study of Mechanical and Tribological Properties of Nanomica Dispersed Hydroxyapatite Based Composites for Biomedical Applications |
| title_sort | study of mechanical and tribological properties of nanomica dispersed hydroxyapatite based composites for biomedical applications |
| url | http://dx.doi.org/10.1155/2017/9814624 |
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