基于物理的机器学习,用于从IR图像中预测导热性
Shinto Mundackal Francis1, Andrew Ferebee1, Sajib Kumar Mohonta1
1Laboratory of Nano-Biophysics, Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, United States.
ACS applied materials & interfaces
|December 4, 2025
概括
本研究介绍了一种机器学习框架,使用红外热学来快速预测聚合物复合材料热接口材料 (PC-TIM) 的热导率. 这种方法为材料开发和质量控制提供了可扩展的诊断.
科学领域:
- 材料科学 材料科学 材料科学
- 物理 物理学 物理
- 计算机科学 计算机科学
背景情况:
- 聚合物复合材料热接口材料 (PC-TIM) 对于电子和储能中的热管理至关重要.
- 测量它们的交平面导热率 (κ) 的传统方法往往是缓慢而复杂的.
- 准确和快速的 κ 测量对于优化 PC-TIM 性能至关重要.
研究的目的:
- 开发一种快速可扩展的诊断工具,用于预测PC-TIM的导热率.
- 将红外 (IR) 温度计与物理驱动的机器学习 (ML) 集成为 κ 预测.
- 为了能够准确地评估PC-TIM在低导电率状态下 (<5 W m-1 K-1).
主要方法:
- 开发了一个以物理为导向的ML框架,将IR热图数据与特征工程结合起来.
- 来自实验和模拟的200多张热图像被处理成结构化的特征向量.
- 随机森林回归者被训练在包括梯度,拉普拉斯变量和热极度在内的特征上.
主要成果:
- 在实验数据上,ML框架实现了对 κ 的可靠预测,R2=0.905和MAE=0.169.
- 随机森林模型在预测热导率方面表现优于线性和增强模型.
- SHAP分析证实了密度和梯度特征对 κ 预测的物理意义.
结论:
- 红外热学与可解释的ML相结合,提供了一种快速可扩展的方法来诊断PC-TIM.
- 这种方法适用于PC-TIM开发和制造质量控制.
- 该框架增强了具有低导热性的材料的特征的能力.
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