The introduction of a test gradient in the additional temperature field ensures "unfreezing" of electrical conductivities in regions with reduced activation energies, which in turn makes it possible to study them on the basis of changes in the flux distribution of an impulsively excited electric field when there is unilateral access to the inspection zone.
By placing restrictions on the duration of the test pulse, it is possible to alleviate the effect of absorption current on the results of nondestructive tests of composites.
The proposed technology for testing (without fracture) the local electrical properties of hot-pressed amorphous dielectrics can also be used in similar situations — such as in quality control of composites of the class ADRAM (advanced radar absorbing material). Applications for these materials have already been found outside of aerospace technology .
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Bul'bik, Y.I. Use of nondestructive test methods to predict the life of hot-pressed ceramic nozzles of closed-drift thrusters. Mech Compos Mater 28, 364–369 (1993). https://doi.org/10.1007/BF00616166
- Activation Energy
- Electrical Conductivity
- Electrical Property
- Temperature Field