Influence of electro-acoustic coating of metals on ordering of dislocating structures

Abstract

Method of electroacoustic spraying allows getting ordering of material remote structures by complex energy interaction and ultrasound field. Complex interaction influences on strengthening surface is leading to a thin film formation, which gives a strong base for the basic material by formation of forecasting structural phase contain for getting protective wear-resistant films and also thanks to interaction forces between a film and a particle location.

Optimal electroacoustic coating modes investigation for production of nanostructured materials

“…To produce protective coatings, the method of electroacoustic coating (ELAC) was used. The physical foundations of the ELAC method were presented in [8][9]. To determine the content of the amorphous phase in the sputtered material, we used the general principles of evaluating the production of amorphous materials discussed in the works of D. Ullman and G. Davis.…”

“…According to calculations it is found: 1) the average calculated grain size of crystallites for different materials is in the range from 2 to 200 nm. Thus finer grains are observed in layers of coverings situated closer to a substrate (cathode), because hardening processes propagate from a substrate; the calculated critical cooling rate necessary for melt amorphization for various materials is from 110 10 to 410 11 (K/s); 3) the calculated cooling rate of melt for various cooling conditions varies from 510 9 to 110 11 (K/s) 4) Depending on critical cooling rate required for melt amorphization and estimated cooling rate observed during solidification, the volume of crystal phase may be in the range from 10 to 100%; 4) obtaining nanostructure coatings when iron is used as cathode material is possible, but in this case one can get rid of amorphous phase completely only at low values of heat flow power (at U voltage 20 V). According to theoretical calculations, the size of crystallites in this case ranges from 20 to 60 nm; 5) according to the data of theoretical calculations for tungsten, obtaining nanostructured and amorphous coatings is impossible, but there is a possibility of obtaining ultradispersed structures with a grain size of 0.…”

“…This article is devoted to a potentially new for nanostructured coatings production method by electroacoustic coating. Such coatings allow significantly (5-8 times) to increase the continuous operation time of parts and mechanisms, as well as forming tools [8][9].…”