Nanoindentation and deformation behaviors of α‐Al2O3: A molecular dynamic study.
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| Title: | Nanoindentation and deformation behaviors of α‐Al2O3: A molecular dynamic study. |
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| Authors: | Xu, Qinqin1 (AUTHOR), Goda, Ibrahim1 (AUTHOR) ibrahim.goda02@gmail.com, Zhang, Yanming2 (AUTHOR) zhangyanming2016@alu.hit.edu.cn, Papanikolaou, Stefanos3 (AUTHOR) |
| Source: | Journal of the American Ceramic Society. May2025, Vol. 108 Issue 5, p1-9. 9p. |
| Subjects: | Dislocation nucleation, Ion bombardment, Molecular dynamics, Aluminum oxide |
| Abstract: | Studying the nanoindentation behavior of materials at the atomic level is crucial for advancing technologies involving energetic atom bombardment, ion implantation, and nanomechanical testing. Using molecular dynamics simulations with two typical rigid ion interatomic potentials (fixed charges), we showed that the mechanical responses and dislocation nucleation of alumina (α$\alpha$‐Al2O3${\rm Al}_2 {\rm O}_3$) are highly temperature‐ and orientation‐dependent. The complex behavior in dislocation dynamics has been rationalized by computing the distribution of stacking fault energy. It is further found that SHIK potential provides better accuracy in describing dislocation dynamics at a much lower computational cost. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Abstract: | Studying the nanoindentation behavior of materials at the atomic level is crucial for advancing technologies involving energetic atom bombardment, ion implantation, and nanomechanical testing. Using molecular dynamics simulations with two typical rigid ion interatomic potentials (fixed charges), we showed that the mechanical responses and dislocation nucleation of alumina (α$\alpha$‐Al2O3${\rm Al}_2 {\rm O}_3$) are highly temperature‐ and orientation‐dependent. The complex behavior in dislocation dynamics has been rationalized by computing the distribution of stacking fault energy. It is further found that SHIK potential provides better accuracy in describing dislocation dynamics at a much lower computational cost. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00027820 |
| DOI: | 10.1111/jace.20390 |
