arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1911.02416cond-mat.mtrl-sciphysics.comp-ph
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基于机器学习的SiO2-based玻璃密度和弹性模量预测

Predicting densities and elastic moduli of SiO2-based glasses by machine learning

Yong-Jie Hu, Ge Zhao, Mingfei Zhang, Bin Bin, Tyler Del Rose, Qian Zhao, Qun Zu, Yang Chen, Xuekun Sun, Maarten de Jong, Liang Qi

摘要:

具有高弹性模量和低重量的SiO2基玻璃的化学设计是非常感兴趣的。然而,它是很难找到一个通用的表达式来预测的弹性模量根据玻璃合成前的组成,因为弹性模量是一个复杂的功能,原子间的键和它们的排序在不同的长度尺度。在这里,我们表明,基于SiO2的玻璃的密度和弹性模量可以通过机器学习(ML)技术在复杂的组成空间中有效地预测,除了SiO2之外还有多种(>10种)添加剂氧化物。我们的机器学习方法依赖于高通量分子动力学(MD)模拟生成的训练集,一组精心构建的描述符,将经验统计建模与原子间键合的基本物理学联系起来,以及通过实施最小绝对收缩和选择算子与梯度增强机(GBM-LASSO)开发的统计学习/预测模型。ML模型的预测进行了全面的比较,并验证了大量的模拟和实验数据。通过仅使用仅由二元和三元玻璃样品组成的数据集进行训练,我们的模型显示出非常有前途的能力,可以预测训练集之外的k-nary SiO2基玻璃的密度和弹性模量。作为其潜在应用的一个例子,我们的GBM-LASSO模型被用来执行多组分玻璃系统的许多(~105)组合物的快速和低成本的筛选,以构建一个组合物属性数据库,该数据库允许对玻璃密度和弹性性能进行富有成效的概述。

英文摘要:

Chemical design of SiO2-based glasses with high elastic moduli and low weight is of great interest. However, it is difficult to find a universal expression to predict the elastic moduli according to the glass composition before synthesis since the elastic moduli are a complex function of interatomic bonds and their ordering at different length scales. Here we show that the densities and elastic moduli of SiO2-based glasses can be efficiently predicted by machine learning (ML) techniques across a complex compositional space with multiple (>10) types of additive oxides besides SiO2. Our machine learning approach relies on a training set generated by high-throughput molecular dynamic (MD) simulations, a set of elaborately constructed descriptors that bridges the empirical statistical modeling with the fundamental physics of interatomic bonding, and a statistical learning/predicting model developed by implementing least absolute shrinkage and selection operator with a gradient boost machine (GBM-LASSO). The predictions of the ML model are comprehensively compared and validated with a large amount of both simulation and experimental data. By just training with a dataset only composed of binary and ternary glass samples, our model shows very promising capabilities to predict the density and elastic moduli for k-nary SiO2-based glasses beyond the training set. As an example of its potential applications, our GBM-LASSO model was used to perform a rapid and low-cost screening of many (~105) compositions of a multicomponent glass system to construct a compositional-property database that allows for a fruitful overview on the glass density and elastic properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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