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Open AccessArticle

Super Ductility of Nanoglass Aluminium Nitride

1
College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
2
Department of Materials Science and Engineering, Faculty of Engineering, Monash University, Clayton, VIC 3800, Australia
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(11), 1535; https://doi.org/10.3390/nano9111535
Received: 25 September 2019 / Revised: 27 October 2019 / Accepted: 28 October 2019 / Published: 29 October 2019
Ceramics have been widely used in many fields because of their distinctive properties, however, brittle fracture usually limits their application. To solve this problem, nanoglass ceramics were developed. In this article, we numerically investigated the mechanical properties of nanoglass aluminium nitride (ng-AlN) with different glassy grain sizes under tension using molecular dynamics simulations. It was found that ng-AlN exhibits super ductility and tends to deform uniformly without the formation of voids as the glassy grain size decreases to about 1 nm, which was attributed to a large number of uniformly distributed shear transformation zones (STZs). We further investigated the effects of temperature and strain rate on ng-AlNd = 1 nm, which showed that temperature insignificantly influences the elastic modulus, while the dependence of the ultimate strength on temperature follows the T2/3 scaling law. Meanwhile, the ultimate strength of ng-AlNd = 1 nm is positively correlated with the strain rate, following a power function relationship. View Full-Text
Keywords: nano-glass ceramic; amorphous AlN; interface; ductility; molecular dynamics simulations nano-glass ceramic; amorphous AlN; interface; ductility; molecular dynamics simulations
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MDPI and ACS Style

Zhao, Y.; Peng, X.; Huang, C.; Yang, B.; Hu, N.; Wang, M. Super Ductility of Nanoglass Aluminium Nitride. Nanomaterials 2019, 9, 1535.

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