基于Ab Initio的驱动,对Al-Li合金的热性能进行探索
Xiaoya Chang1, Yongchao Wu1, Qingzhao Chu1
1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
ACS applied materials & interfaces
|March 18, 2024
概括
- (Al-Li) 合金增强了能源和推进剂系统. 在Al-Li合金中较低的导热率加快了点火,提高了燃烧性能.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 计算化学计算化学
背景情况:
- - (Al-Li) 合金为能源和推进系统提供了增强的热释放和特定的冲动.
- 合金的热性能对于制造,储存安全和推进剂点火延迟至关重要.
研究的目的:
- 开发一个神经网络潜力 (NNP) 用于对Al-Li合金的热行为进行原子研究.
- 通过分子动力学模拟,探索 (Li) 兴奋剂对Al-Li合金热性能的影响.
主要方法:
- 开发一种新的神经网络潜力 (NNP),用于精确模拟Al-Li合金.
- 基于NNP的分子动力学模拟以分析不同含量下的热特性.
- 对纯 (Al) 的实验数据进行模拟结果与实验数据的验证.
主要成果:
- NNP准确地预测了能量,原子力,机械性能,声子振动和动态演变.
- 微小的含量变化显示了点,热膨胀和辐射分布功能的轻微变化.
- 随着含量增加,观察到导热率的显著降低,这与元素物理性质有关.
结论:
- 合金中的热导率降低促进了热的积累,加速了表面的预化和点火.
- 这项研究为Al-Li合金的改善燃烧性能提供了原子学解释.
- 这些发现为开发用于燃烧应用的Al-Li合金制造技术提供了原子学指南.
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