Date of Graduation
Spring 2023
Degree
Master of Science in Materials Science
Department
Physics, Astronomy, and Materials Science
Committee Chair
Ridwan Sakidja
Abstract
The interatomic potentials designed for binary/high entropy diborides and ultra-high temperature composites (UHTC) have been developed through the implementation of deep neural network (DNN) algorithms. These algorithms employed two different approaches and corresponding codes; 1) strictly local & invariant scalar-based descriptors as implemented in the DEEPMD code and 2) equivariant tensor-based descriptors as included in the ALLEGRO code. The samples for training and validation sets of the forces, energy, and virial data were obtained from the ab-initio molecular dynamics (AIMD) simulations and Density Functional Theory (DFT) calculations, including the simulation data from the ultra-high temperature region (> 2000K). The study then compared the accuracy of the Deep Learning potentials to predict not only the ground-state properties, such as the elastic constants and the phonon dispersion curves but also the ultra-high temperature properties, including the lattice parameters and melting behaviors.
Keywords
interatomic potential, molecular dynamics, thermal properties, high entropy diborides, ultra-high temperature ceramics, artificial intelligence
Subject Categories
Atomic, Molecular and Optical Physics | Ceramic Materials | Engineering Physics | Other Materials Science and Engineering
Copyright
© Nur Aziz Octoviawan
Recommended Citation
Octoviawan, Nur Aziz, "Development of Interatomic Potential of High Entropy Diborides With Artificial Intelligence Approach to Simulate the Thermo-Mechanical Properties" (2023). MSU Graduate Theses/Dissertations. 3835.
https://bearworks.missouristate.edu/theses/3835
Open Access
Included in
Atomic, Molecular and Optical Physics Commons, Ceramic Materials Commons, Engineering Physics Commons, Other Materials Science and Engineering Commons
