Computation of Electropulse-driven Regeneration of Magnetic Heterogeneous Materials

Qin, Rongshan (2020). Computation of Electropulse-driven Regeneration of Magnetic Heterogeneous Materials. In: 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), pp. 1185–1189.

DOI: https://doi.org/10.1109/PIERS-Spring46901.2019.9017675

Abstract

When a material with heterogeneous microstructure degraded in a service environment, both the local and overall magnetic and electric properties inside the materials changed drastically. This is particularly significant for the magnetic properties. The diffusion of solute elements from one to another zones causes drastic alteration of magnetic permeability. When an electric field is applied to the materials, the electromagnetic responses of the degraded materials to the applied electromagnetic field are different from that of the state before degradation. In some special cases, the applied electric field can drive the degraded materials to recover to the original state. This article reports our detailed theoretical and numerical calculation of the electropulse-driven regeneration project. The changes of electrical and magnetic properties during the materials degradation were analysed and investigated. The microstructures during the degradation and regeneration were reconstructed using a phase field method. The chemical free energy was obtained from commercial thermodynamic database. The electromagnetic thermodynamics was calculated according to the change of microstructure and electromagnetic properties in the materials. The proposed computational electromagnetic method can be implemented to the investigation of regeneration of many engineering materials.

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