Next Article in Journal
Antagonistic Effect of Azoxystrobin Poly (Lactic Acid) Microspheres with Controllable Particle Size on Colletotrichum higginsianum Sacc
Previous Article in Journal
Green Synthesis of Hydrophobic Magnetite Nanoparticles Coated with Plant Extract and Their Application as Petroleum Oil Spill Collectors
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle
Nanomaterials 2018, 8(10), 856; https://doi.org/10.3390/nano8100856

Molecular Dynamics Simulation on B3-GaN Thin Films under Nanoindentation

1
Department of Engineering Mechanics, College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
2
Chongqing Key Laboratory of Heterogeneous Material Mechanics, Chongqing University, Chongqing 400044, China
*
Authors to whom correspondence should be addressed.
Received: 25 September 2018 / Revised: 10 October 2018 / Accepted: 16 October 2018 / Published: 19 October 2018
  |  
PDF [13777 KB, uploaded 19 October 2018]
  |  

Abstract

The B3-GaN thin film was investigated by performing large-scale molecular dynamics (MD) simulation of nanoindentation. Its plastic behavior and the corresponding mechanism were studied. Based on the analysis on indentation curve, dislocation density, and orientation dependence, it was found that the indentation depths of inceptive plasticity on (001), (110), and (111) planes were consistent with the Schmid law. The microstructure evolutions during the nanoindentation under different conditions were focused, and two formation mechanisms of prismatic loop were proposed. The “lasso”-like mechanism was similar to that in the previous research, where a shear loop can translate into a prismatic loop by cross-slip; and the extended “lasso”-like mechanism was not found to be reported. Our simulation showed that the two screw components of a shear loop will glide on another loop until they encounter each other and eventually produce a prismatic dislocation loop. View Full-Text
Keywords: molecular dynamics; B3-GaN; anisotropy; prismatic loops; dislocation density molecular dynamics; B3-GaN; anisotropy; prismatic loops; dislocation density
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Chen, C.; Li, H.; Xiang, H.; Peng, X. Molecular Dynamics Simulation on B3-GaN Thin Films under Nanoindentation. Nanomaterials 2018, 8, 856.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Nanomaterials EISSN 2079-4991 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top