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High impact resistance in graphyne
Yang Yang1,2, Qiang Cao1,2, Yang Gao3
1The Institute of Technological Sciences, Wuhan University Wuhan 430072 China caoqiang@whu.edu.cn.
RSC Advances
|May 2, 2022
Summary
Graphyne sheets offer excellent ballistic protection, showing high impact resistance comparable to graphene. Different graphyne structures exhibit unique wave speeds and mechanical properties, suggesting their potential as protective materials.
Area of Science:
- Materials Science
- Nanotechnology
- Solid Mechanics
Background:
- Graphyne, a novel carbon allotrope, has been synthesized with promising mechanical and electrical properties.
- Understanding the mechanical behavior of new materials is crucial for their application in protective structures.
Purpose of the Study:
- To investigate the ballistic protection capabilities of various graphyne structures (α-, β-, δ-, γ-graphyne).
- To compare the impact resistance and mechanical properties of graphyne with graphene.
Main Methods:
- Utilized molecular dynamics simulations combined with elastic theory.
- Calculated in-plane elastic wave and out-of-plane cone wave velocities.
- Determined specific penetration energies and Young's modulus.
Main Results:
- Graphyne exhibits specific penetration energies approximately 83% of graphene, indicating superior impact resistance.
- γ-Graphyne shows high sound wave speeds and a Young's modulus ~60% of graphene.
- α-Graphyne demonstrated the highest penetration energy and impact resistance across most tested projectile speeds.
Conclusions:
- Graphyne possesses significant potential as a protective structural material due to its high impact resistance.
- The distinct mechanical properties of different graphyne isomers allow for tailored applications in protective technologies.
