Pressure Welding through a Layer of Hydrocarbon Material: Electromagnetic Phenomena during the Diffusion Bonding Formation

Abstract

The literary data dealing with the experimental studies concerning the influence of electromagnetic phenomena on the diffusion processes are reviewed and analysed. Based on the scientific facts presented in interdisciplinary experimental studies, a hypothesis is suggested. It is concerned with the influence of electromagnetic phenomena in the process of formation of a diffusion joint during pressure welding through a layer of a hydrocarbon substance. In the welded joint, at the initial moment of current transmission, energy is released during the explosion at the points of contact. When a pulsed electric current is passed through the pyrolysis products in microvolumes between the surfaces to be joined, they are also destroyed. Ionized particles are formed. Under the action of the pinch effect, they move to the centre of the welded joint. A capsule with ionized carbon particles is formed there. The ‘Coulomb explosion’ occurs in the capsule located in the middle of the joint. Multiple exposures of the surfaces by microexplosions in microvolumes between the surfaces to be joined and the final ‘Coulomb explosion’ of the capsule create the release of a large number of magnetic monopoles. This can be a determining and synergistic factor among a number of others in the formation of a welded joint. This makes it possible to explain the short time required for welding and the small deformations of the weld formation zone.

Keywords

• pressure welding
• hydrocarbon substances
• electric explosion
• electric current
• diffusion