A modified method of applying detonation-sprayed composite coatings by a magnetic field

Wear Resistance Research and Its 2-factor Modeling of Nanoscaled Silicon Carbide Detonation Coatings

“…Thus the iron millings had retardated the microsized particles, but not nanosized. The coating thickness varied about 60 micrometers after about 120 shots of detonation installation barrel (so approximately 0,5 micrometer per shot) [3] comparing with the microstructural coating 200 micrometers per 30 shots (so approximately 5 micrometer per shot) [1][2]. So the about 90% of batch mixture charge was wasted, what allows making the conclusion the amount of nanosized particles was about ~10% (overwhelming majority of nanoscaled particles is SiC) The content of the nanoparticles is about 85% of SiC, 10% of Al2O3 and 5% of Fe2C.…”

“…So it had been established on direct polarity of coil magnet the microparticles of silicon carbide and alumina had been deposited on the substrate. The coating had demonstrated not only high wear resistance 40-55 micrometers/km and friction factor 0,42-0.45 [1], but also high wear resistance at elevated temperatures up to 500 o C it makes 40-55 micrometers/km and friction factor 0,32-0.34 [2] due to formation of the glass-like superficial structures reducing the wear rate and friction factor comparing with the 250 o C.…”

“…Formerly [1], the specific way acquired batch mixture of SiC-Al2O3 (which was milled in steel vessels by steel milling bodies in 32 hours up to 2,1 micrometers average particle granularity) content, which had the iron millings in the batch mixture charge, was used for acquisition of wearproof coating deposition by detonation method modified by magnetic field. So it had been established on direct polarity of coil magnet the microparticles of silicon carbide and alumina had been deposited on the substrate.…”

Structure research of nanoscaled silicon carbide detonation coatings of tribotechnical application

“…As have already been mentioned the specific way acqured batch mixture of SiC-Al2O3 content was used for acquisition of wearproff composited [13] the same batch mixture was applied for coating deposition by detonation method modified by magnetic field [14]. So it had been established on direct poalrity of coil magnet the microparticles of silicon carbide and alumina had been deposited on the substrate.…”

“…So it had been established on direct poalrity of coil magnet the microparticles of silicon carbide and alumina had been deposited on the substrate. The coating had demonstrated not only high wear resistanse [14], but also high wear resistanse at elevated temperatures [15]. The last metioned composition had been widely used for coating deposition by different technique and several results had been acquired.…”