An optimized strategy for density prediction of intermetallics across varied crystal structures via graph neural network

Intermetallic compounds are crucial in modern industry due to their exceptional properties, where density is identified as a critical parameter determining their potentiality for lightweight applications. In this study, over 7,000 density data points are collected for binary intermetallic compounds from different crystal structures. A new intermetallics graph neural network model (IGNN) is developed to perform regression and classification tasks for density prediction. Compared to traditional machine learning models, the IGNN model demonstrated superior capability in capturing crystal structure and effectively addressing challenges posed by polymorphism. The interpretability of the IGNN model classification process is enhanced through the t-SNE visualization method. Additionally, the IGNN model exhibited excellent performance in predicting the density of multi-component complex intermetallic compounds, indicating its robustness and generalizability. This study presents a graph neural network method suitable for multi-crystal structure data modeling, providing a novel computational framework for density prediction in intermetallic compounds. This advancement represents a significant contribution to this field, paving the way for more targeted material selection and application in lightweight technologies.