Nanoindentation behavior in T-carbon thin films: a molecular dynamics study
T-carbon is a new allotrope of carbon materials, and it displays high hardness and low density. Nevertheless, the hardening mechanisms of T-carbon thin films under nanoindentation remain elusive. This work utilizes molecular dynamics simulation to explore the hardening mechanisms of T-carbon thin fi...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/182480 |
| _version_ | 1826129529087721472 |
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| author | Zhou, Runhua Huang, Changjin Srikanth, Narasimalu Bai, Lichun Wu, Mao See |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Zhou, Runhua Huang, Changjin Srikanth, Narasimalu Bai, Lichun Wu, Mao See |
| author_sort | Zhou, Runhua |
| collection | NTU |
| description | T-carbon is a new allotrope of carbon materials, and it displays high hardness and low density. Nevertheless, the hardening mechanisms of T-carbon thin films under nanoindentation remain elusive. This work utilizes molecular dynamics simulation to explore the hardening mechanisms of T-carbon thin films under nanoindentation with variations of loading velocities and temperatures. The results reveal that a loading velocity increase at a given temperature raises the nanoindentation force. The increase in nanoindentation force is due to graphitization, which is related to the fracture of tetrahedral structures in T-carbon thin films. However, increased graphitization caused by an increased temperature lowers the nanoindentation force at a given loading velocity. The increased graphitization is influenced by both the fractured tetrahedrons and the deformation of inter-tetrahedron bond angles. This is attributed to the loss of thermal stability and the lower density of T-carbon thin films as the temperature increases. These findings have significant implications for the design of nanodevices for specific application requirements. |
| first_indexed | 2025-03-09T15:07:10Z |
| format | Journal Article |
| id | ntu-10356/182480 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-03-09T15:07:10Z |
| publishDate | 2025 |
| record_format | dspace |
| spelling | ntu-10356/1824802025-02-04T04:47:20Z Nanoindentation behavior in T-carbon thin films: a molecular dynamics study Zhou, Runhua Huang, Changjin Srikanth, Narasimalu Bai, Lichun Wu, Mao See School of Mechanical and Aerospace Engineering Energy Research Institute @ NTU (ERI@N) Engineering Hardening mechanisms Molecular dynamics T-carbon is a new allotrope of carbon materials, and it displays high hardness and low density. Nevertheless, the hardening mechanisms of T-carbon thin films under nanoindentation remain elusive. This work utilizes molecular dynamics simulation to explore the hardening mechanisms of T-carbon thin films under nanoindentation with variations of loading velocities and temperatures. The results reveal that a loading velocity increase at a given temperature raises the nanoindentation force. The increase in nanoindentation force is due to graphitization, which is related to the fracture of tetrahedral structures in T-carbon thin films. However, increased graphitization caused by an increased temperature lowers the nanoindentation force at a given loading velocity. The increased graphitization is influenced by both the fractured tetrahedrons and the deformation of inter-tetrahedron bond angles. This is attributed to the loss of thermal stability and the lower density of T-carbon thin films as the temperature increases. These findings have significant implications for the design of nanodevices for specific application requirements. 2025-02-04T04:47:20Z 2025-02-04T04:47:20Z 2025 Journal Article Zhou, R., Huang, C., Srikanth, N., Bai, L. & Wu, M. S. (2025). Nanoindentation behavior in T-carbon thin films: a molecular dynamics study. Acta Mechanica Sinica, 41(5), 124222-. https://dx.doi.org/10.1007/s10409-024-24222-x 0567-7718 https://hdl.handle.net/10356/182480 10.1007/s10409-024-24222-x 2-s2.0-85209694914 5 41 124222 en Acta Mechanica Sinica © 2024 The Chinese Society of Theoretical and Applied Mechanics and Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved. |
| spellingShingle | Engineering Hardening mechanisms Molecular dynamics Zhou, Runhua Huang, Changjin Srikanth, Narasimalu Bai, Lichun Wu, Mao See Nanoindentation behavior in T-carbon thin films: a molecular dynamics study |
| title | Nanoindentation behavior in T-carbon thin films: a molecular dynamics study |
| title_full | Nanoindentation behavior in T-carbon thin films: a molecular dynamics study |
| title_fullStr | Nanoindentation behavior in T-carbon thin films: a molecular dynamics study |
| title_full_unstemmed | Nanoindentation behavior in T-carbon thin films: a molecular dynamics study |
| title_short | Nanoindentation behavior in T-carbon thin films: a molecular dynamics study |
| title_sort | nanoindentation behavior in t carbon thin films a molecular dynamics study |
| topic | Engineering Hardening mechanisms Molecular dynamics |
| url | https://hdl.handle.net/10356/182480 |
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