Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A continuum theory for evaluating the impact of stress on the kinetics of hydrogen uptake and release in metal hydrides
Submission Author:
Antônio da Cruz , PA
Co-Authors:
Natanaele Soares Medeiros, Antônio da Cruz, Angela Cristina Cardoso de Souza, Fernando Pereira Duda
Presenter: Natanaele Soares Medeiros
doi://10.26678/ABCM.COBEM2023.COB2023-2276
Abstract
Metal hydrides show promise as solid-state hydrogen storage options, but their practical use is challenging due to slow hydrogen uptake and release. This has led to interest in using metal nanoparticles as advanced materials for new hydrogen storage systems, as they display fast kinetics. However, understanding the adsorption and release kinetics requires investigation of the role of stress in accommodating the misfit between metal and hydride phases. In this paper, we present a continuum theory to assess how misfit stress affects the kinetics of hydride formation and growth in metallic nanoparticles, which we then apply to study the kinetics of adsorption and release in spherical particles.
Keywords
diffusion-induced stress, Configurational Forces, hydrogen-storage systems, Phase Transformation
