Nonisothermal conservative phase-field model for electric breakdown process

In this paper we consider phase-field model which describes electric breackdown process in solid dielectrics. The presented model extends the earlier presented one. The derived model includes energy conservation equation, accounts for nonisothermal effects (e.g., Joule heating) and consistently describes energy transformation during breakdown channel propagation. The consistent derivaton of the model is performed in the context of rational thermomechanics framework and M. Gurtin theory of microstresses and microforces.

Радиоизлучение, создаваемое электрическим пробоем пленки полипропилена

During electrical breakdown of a thin film of polypropylene, radiation of a radio pulse was detected. The pulse duration is about 400 ns. The spectrum of the radio pulse consists of three main frequencies. The relationship between the breakdown channel resistance and the observed spectrum is substantiated

Влияние растягивающих нагрузок на напряжение пробоя тонких пленок

The problem of electrical breakdown of exterior coating of aircraft was discussed and it is shown that the formation of a breakdown channel in a dielectric film is associated with the rupture of polymer macromolecules in stretched zones. On the example of polyether urethane film, it was experimentally revealed that with an increase in tensile loads, the breakdown voltage (dielectric strength) decreases exponentially.