Friction and wear behaviors of reduced graphene oxide- and carbon nanotube-reinforced hydroxyapatite bioceramics
Friction and wear properties play an important role in the long-term in vivo performance of load-bearing bioceramic implants. In this study, the friction and wear behaviors of hydroxyapatite (HA) reinforced with reduced graphene oxide (rGO) and rGO + carbon nanotube (CNT) hybrids were studied by bal...
| Principais autores: | , , , , , |
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| Formato: | Journal Article |
| Idioma: | English |
| Publicado em: |
2021
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| Acesso em linha: | https://hdl.handle.net/10356/146038 |
| _version_ | 1826129669982781440 |
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| author | Hu, Huanlong Li, Zhong Sun, Wen Li, Ruitao Li, Hua Khor, Khiam Aik |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Hu, Huanlong Li, Zhong Sun, Wen Li, Ruitao Li, Hua Khor, Khiam Aik |
| author_sort | Hu, Huanlong |
| collection | NTU |
| description | Friction and wear properties play an important role in the long-term in vivo performance of load-bearing bioceramic implants. In this study, the friction and wear behaviors of hydroxyapatite (HA) reinforced with reduced graphene oxide (rGO) and rGO + carbon nanotube (CNT) hybrids were studied by ball-on-disk tests to understand the effects of nanocarbon content and morphology on the composites’ tribological behaviors. The intact and worn surfaces were characterized by optical microscopy, nanoindentation, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Raman spectroscopy. We found that the incorporation of rGO and rGO + CNT hybrids in HA bioceramic both improved the friction and wear behaviors, and the highest wear resistance was achieved by employing 1 wt% rGO and 1 wt% CNT as reinforcements. The major reinforcing mechanism was the formation of carbonaceous films between the composite surfaces and counterbody, which served as solid lubrication films that resulted in a lower coefficient of friction, higher hardness, and increased hardness/modulus ratio. Importantly, CNT addition facilitated the uniform distribution of the reinforcements in the HA matrix and the pinning effects of CNT enhanced the connection between rGO and HA. |
| first_indexed | 2024-10-01T07:44:18Z |
| format | Journal Article |
| id | ntu-10356/146038 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:44:18Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1460382023-03-04T17:15:56Z Friction and wear behaviors of reduced graphene oxide- and carbon nanotube-reinforced hydroxyapatite bioceramics Hu, Huanlong Li, Zhong Sun, Wen Li, Ruitao Li, Hua Khor, Khiam Aik School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Hydroxyapatite Carbonaceous Reinforcement Friction and wear properties play an important role in the long-term in vivo performance of load-bearing bioceramic implants. In this study, the friction and wear behaviors of hydroxyapatite (HA) reinforced with reduced graphene oxide (rGO) and rGO + carbon nanotube (CNT) hybrids were studied by ball-on-disk tests to understand the effects of nanocarbon content and morphology on the composites’ tribological behaviors. The intact and worn surfaces were characterized by optical microscopy, nanoindentation, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Raman spectroscopy. We found that the incorporation of rGO and rGO + CNT hybrids in HA bioceramic both improved the friction and wear behaviors, and the highest wear resistance was achieved by employing 1 wt% rGO and 1 wt% CNT as reinforcements. The major reinforcing mechanism was the formation of carbonaceous films between the composite surfaces and counterbody, which served as solid lubrication films that resulted in a lower coefficient of friction, higher hardness, and increased hardness/modulus ratio. Importantly, CNT addition facilitated the uniform distribution of the reinforcements in the HA matrix and the pinning effects of CNT enhanced the connection between rGO and HA. Ministry of Education (MOE) Nanyang Technological University Published version This work was supported by Nanyang Technological University Singapore (Grant No. M4080160) and Ministry of Education, Singapore (AcRF Tier 1 Grant RG141/17). 2021-01-21T09:00:59Z 2021-01-21T09:00:59Z 2020 Journal Article Hu, H., Li, Z., Sun, W., Li, R., Li, H., & Khor, K. A. (2020). Friction and Wear Behaviors of Reduced Graphene Oxide- and Carbon Nanotube-Reinforced Hydroxyapatite Bioceramics. Frontiers in Materials, 7, 564624-. doi:10.3389/fmats.2020.564624 2296-8016 https://hdl.handle.net/10356/146038 10.3389/fmats.2020.564624 2-s2.0-85098214166 7 en M4080160 RG141/17 Frontiers in Materials © 2020 Hu, Li, Sun, Li, Li and Khor . This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Hydroxyapatite Carbonaceous Reinforcement Hu, Huanlong Li, Zhong Sun, Wen Li, Ruitao Li, Hua Khor, Khiam Aik Friction and wear behaviors of reduced graphene oxide- and carbon nanotube-reinforced hydroxyapatite bioceramics |
| title | Friction and wear behaviors of reduced graphene oxide- and carbon nanotube-reinforced hydroxyapatite bioceramics |
| title_full | Friction and wear behaviors of reduced graphene oxide- and carbon nanotube-reinforced hydroxyapatite bioceramics |
| title_fullStr | Friction and wear behaviors of reduced graphene oxide- and carbon nanotube-reinforced hydroxyapatite bioceramics |
| title_full_unstemmed | Friction and wear behaviors of reduced graphene oxide- and carbon nanotube-reinforced hydroxyapatite bioceramics |
| title_short | Friction and wear behaviors of reduced graphene oxide- and carbon nanotube-reinforced hydroxyapatite bioceramics |
| title_sort | friction and wear behaviors of reduced graphene oxide and carbon nanotube reinforced hydroxyapatite bioceramics |
| topic | Engineering::Mechanical engineering Hydroxyapatite Carbonaceous Reinforcement |
| url | https://hdl.handle.net/10356/146038 |
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