对于碳的超级刚性:键强度和无otropic响应之间的相互作用
Vladlen V Zhukov1,2, Zhifeng Zheng3,4, Pavel B Sorokin1,2
1Technological Institute for Superhard and Novel Carbon Materials, 108840, 7a Tsentralnaya street, Troitsk, Moscow, Russian Federation.
The journal of physical chemistry letters
|October 1, 2024
概括
研究人员探索了新的超硬碳材料. 一些比钻石更密集和更硬,但由于异型应变而具有较低的散量模量,揭示了关键的机械性质见解.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 计算化学的计算化学
背景情况:
- 钻石以其特殊的机械刚性而闻名,这是由于碳的多功能杂交.
- 目前正在寻找具有超过钻石性能的新型超硬碳材料.
- 以前的预测表明,碳相具有比钻石更高的结合刚度和密度.
研究的目的:
- 为了研究新的超硬碳相.
- 解决这些阶段中高结合刚度/密度和较低散体模量之间的明显矛盾.
- 在碳材料中引入和量化应变异构性.
主要方法:
- 对先前预测的超硬碳相进行分析.
- 计算平均结合度,密度和散装模量.
- 介绍和应用应变异性概念来解释机械行为.
主要成果:
- 一些预测的超硬碳相比钻石具有更高的平均键度和密度.
- 这些阶段与钻石相比,体积模量较低.
- 这种差异归因于对等性变形的异型反应,用菌株异型度量化.
结论:
- 应变异性是影响碳材料散体模量的一个关键因素.
- 对机械性质的全面理解需要考虑异构性行为.
- 这项研究揭示了新型碳结构中的键度和散装模量之间的重要联系.
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