Model of nanodegradation processes in electronic equipment of NPP Kozloduy

18th International School on Condensed Matter Physics: "Challenges of Nanoscale Science: Theory, Materials, Applications"

Popov, A.^1

Sofia University, Faculty of Physics, 5 J. Boucher Blvd, BG, Sofia

1164, Bulgaria^1

关键词: Basic parameters;    Catastrophic failures;    Degradation process;    Electronic component;    Elevated temperature;    Increased temperature;    Local temperature;    Specific resistances;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/558/1/012014/pdf
DOI  :  10.1088/1742-6596/558/1/012014

来源: IOP

【 摘 要 】

From the complex studies it was proof that the main degradation processes in the three groups of elements for the extended period of time are slow; do not lead to a hopping change in basic parameters and to catastrophic failures. This gives grounds to suggest a common diffusion model, which is limited to the following: -in electronic components containing a p-n junction, is performed diffusion of residual cooper atoms, that are accumulated in the area of a spatial charge under the influence of the electric field and the local temperature, creating micro-shunt regions; -in the contactor systems whose contact surfaces are made of metal alloys under the influence of increased temperature starts decomposition of a homogeneous alloy. Conditions are created for diffusion of individual atoms to the surface, micro-phases of homogeneous atoms are formed and modify the contact resistances; -in the course of time in the insulating materials are changed the mechanisms of polarization, double bonds and dipoles are disrupting, leading to the release of carbon atoms. The latter diffuse at elevated temperatures and form conductive cords, which amend the dielectric losses and the specific resistance of the materials.