Dielectric breakdown model for conductor-loaded and insulator-loaded composite materials

Area of Science:

• Materials Science
• Physics
• Electrical Engineering

Background:

• Dielectric breakdown in composite materials is crucial for electrical insulation.
• Previous models focused on conductor-loaded composites, leaving insulator-loaded systems less explored.
• Understanding breakdown patterns is key to predicting material failure.

Purpose of the Study:

• To generalize the dielectric breakdown model for both conductor-loaded and insulator-loaded composites.
• To investigate the influence of particle concentration on breakdown patterns.
• To characterize dielectric breakdown using fractal dimension and Weibull distribution parameters.

Main Methods:

• Extension of a previous dielectric breakdown model.
• Random distribution of particles within a matrix at variable concentration (p).
• Assignment of breakdown channel formation probabilities based on particle characteristics.

Main Results:

• The generalized model successfully describes dielectric breakdown patterns in both composite types.
• Dielectric breakdown patterns are characterized by fractal dimension (D) and Weibull distribution parameters.
• Studies show a dependence of breakdown characteristics on the fraction of inhomogeneities (p).

Conclusions:

• The generalized dielectric breakdown model provides a unified framework for analyzing composite materials.
• Particle characteristics and concentration significantly influence dielectric breakdown behavior.
• The findings contribute to the design and reliability of electrical insulation systems.