Architectural and component design of CNTs/Al hierarchical composite for enhanced mechanical/thermal properties
This study aims to fabricate heterogeneous CNTs/Al composites with a hierarchical structure using powder metallurgy techniques. The hierarchical composites are composed of alternating layers with and without CNTs. Tensile testing of the as-sintered sample, with a 3.5 mm width and containing 0.5 wt%...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424005933 |
| _version_ | 1797260319535398912 |
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| author | Mingjie Shen Zhen Hao JiangNan Song Meng An Tao Ying Xiangzhen Xue Yang Gao Zongyang Yang |
| author_facet | Mingjie Shen Zhen Hao JiangNan Song Meng An Tao Ying Xiangzhen Xue Yang Gao Zongyang Yang |
| author_sort | Mingjie Shen |
| collection | DOAJ |
| description | This study aims to fabricate heterogeneous CNTs/Al composites with a hierarchical structure using powder metallurgy techniques. The hierarchical composites are composed of alternating layers with and without CNTs. Tensile testing of the as-sintered sample, with a 3.5 mm width and containing 0.5 wt% CNTs, revealed an ultimate tensile strength of 249 MPa and 11.8 % elongation to failure. This shows an improvement in overall mechanical properties while maintaining the superior ductility of the alloy and the high strength of uniform composites. Indicating an effective overcoming of the traditional trade-off between strength and ductility. Several strengthening mechanisms have been discussed, including load transfer, grain refinement, and extra dislocations. Coordinated deformation and retarding effect during crack propagation can significantly enhance ductility. Furthermore, the incorporation of reinforcement increased the thermal conductivity by 18.6% due to the excellent thermal characteristics of CNTs. To investigate the intrinsic principles, a parallel and series model was developed to simulate the arrangement of CNTs in the Al matrix. Molecular dynamics (MD) simulations revealed the heat transfer mechanism through the electron-phonon coupling effect. This study proposes a new approach for creating metal materials that have both strength and ductility, while also improving their thermal conductivity. |
| first_indexed | 2024-04-24T23:23:26Z |
| format | Article |
| id | doaj.art-07f443e8efdc4d4b863ef67ef7e24d85 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T23:23:26Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-07f443e8efdc4d4b863ef67ef7e24d852024-03-16T05:08:30ZengElsevierJournal of Materials Research and Technology2238-78542024-05-0130120133Architectural and component design of CNTs/Al hierarchical composite for enhanced mechanical/thermal propertiesMingjie Shen0Zhen Hao1JiangNan Song2Meng An3Tao Ying4Xiangzhen Xue5Yang Gao6Zongyang Yang7College of Mechanical & Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, ChinaCollege of Mechanical & Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, ChinaCollege of Mechanical & Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, ChinaCollege of Mechanical & Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China; Light Industrial Xi'an Mechanic Design Research Institute Co., Ltd., China; Corresponding author. College of Mechanical & Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China.National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaCollege of Mechanical & Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, ChinaGuizhou Provincial Key Laboratory for Aero-engine Rotors Structural Integrity, Guiyang, 550081, ChinaAviation Military Representative Office of the Army Arament Department Aviation Military Representative Bureau in Shanghai, Shanghai, 200032, ChinaThis study aims to fabricate heterogeneous CNTs/Al composites with a hierarchical structure using powder metallurgy techniques. The hierarchical composites are composed of alternating layers with and without CNTs. Tensile testing of the as-sintered sample, with a 3.5 mm width and containing 0.5 wt% CNTs, revealed an ultimate tensile strength of 249 MPa and 11.8 % elongation to failure. This shows an improvement in overall mechanical properties while maintaining the superior ductility of the alloy and the high strength of uniform composites. Indicating an effective overcoming of the traditional trade-off between strength and ductility. Several strengthening mechanisms have been discussed, including load transfer, grain refinement, and extra dislocations. Coordinated deformation and retarding effect during crack propagation can significantly enhance ductility. Furthermore, the incorporation of reinforcement increased the thermal conductivity by 18.6% due to the excellent thermal characteristics of CNTs. To investigate the intrinsic principles, a parallel and series model was developed to simulate the arrangement of CNTs in the Al matrix. Molecular dynamics (MD) simulations revealed the heat transfer mechanism through the electron-phonon coupling effect. This study proposes a new approach for creating metal materials that have both strength and ductility, while also improving their thermal conductivity.http://www.sciencedirect.com/science/article/pii/S2238785424005933Carbon nanotubesHierarchical compositesMechanical propertyThermal conductivity |
| spellingShingle | Mingjie Shen Zhen Hao JiangNan Song Meng An Tao Ying Xiangzhen Xue Yang Gao Zongyang Yang Architectural and component design of CNTs/Al hierarchical composite for enhanced mechanical/thermal properties Journal of Materials Research and Technology Carbon nanotubes Hierarchical composites Mechanical property Thermal conductivity |
| title | Architectural and component design of CNTs/Al hierarchical composite for enhanced mechanical/thermal properties |
| title_full | Architectural and component design of CNTs/Al hierarchical composite for enhanced mechanical/thermal properties |
| title_fullStr | Architectural and component design of CNTs/Al hierarchical composite for enhanced mechanical/thermal properties |
| title_full_unstemmed | Architectural and component design of CNTs/Al hierarchical composite for enhanced mechanical/thermal properties |
| title_short | Architectural and component design of CNTs/Al hierarchical composite for enhanced mechanical/thermal properties |
| title_sort | architectural and component design of cnts al hierarchical composite for enhanced mechanical thermal properties |
| topic | Carbon nanotubes Hierarchical composites Mechanical property Thermal conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424005933 |
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