Description of Seizure Process for Gas Dynamic Spray of Metal Powders from Non-Equilibrium Thermodynamics Standpoint

Abstract

Abstract:The seizure process has been considered from the non-equilibrium thermodynamics and self-organization theory standpoints. It has been testified that, for the intensification of powder mix particles seizing with the substrate during spraying, it is required that relatively light components of the powder mix should be preferably transferred into the friction zone. The theory inferences have been experimentally confirmed, as exemplified by the gas dynamic spray of copper-zinc powders mix.

Influence of the Nonequilibrium Material State on Wear Resistance

“…Thermodynamic stability is determined by the sign of excess entropy production [14]. The entropy production of a rubbing body under friction according to [19] is the following:…”

Aspects of Self-Organization of Tribological Stressed Lubricating Greases

“…As mentioned in [24], self-organization leads to the formation of dissipative structures. Reference [25] argue that self-optimization can be initiated in a system after it has lost its thermodynamic stability.…”

“…According to [25], let us introduce a parameter ε to describe the distance from the equilibrium. In our case, ε expresses the difference between the grease structure in an equilibrium and the structure in an a stationary non-equlibrium state.…”

Microstructural Studies of the Copper-Based Coating Obtained by Cold Gas-Dynamic Spraying for the Restoration of Worn-Out Contact Wires

“…This paper is a part of ongoing research focused on an application of cold spray technology to restore worn-out areas of contact wires for electrified rail transport [1][2][3]. Previously, the problem of restoring the local wear of contact wires was not solved.…”