Oxide nanometric pellicles formation by applying electrical dicharges in inpulse
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537.523 (16)
Fenomene electronice şi ionice (144)
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TOPALĂ, Pavel, OJEGOV, Alexandr, STOICEV, Petru. Oxide nanometric pellicles formation by applying electrical dicharges in inpulse. In: Journal of Engineering Sciences, 2018, vol. 25, nr. 2, pp. 18-26. ISSN 2587-3474.
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Journal of Engineering Sciences
Volumul 25, Numărul 2 / 2018 / ISSN 2587-3474 /ISSNe 2587-3482

Oxide nanometric pellicles formation by applying electrical dicharges in inpulse

CZU: 537.523

Pag. 18-26

Topală Pavel1, Ojegov Alexandr1, Stoicev Petru2
 
1 "Alecu Russo" State University of Balti,
2 Technical University of Moldova
 
Disponibil în IBN: 6 noiembrie 2018


Rezumat

The paper presents the results of theoretical and experimental investigations of phenomena that accompany the formation of nanometer oxide and hydroxide pellicles by applying electrical discharges in impulse (EDI). The chemical content of processed surface analysis (EDX – Energy Dispersive X-ray analysis) attests the presence of oxygen that reaches up to 60% at. for steel surfaces, 30-35% at. for those made of titanium alloys, up to 20% at. for those made of aluminum alloys, and up to 50% at. for those made of copper alloys. The presence of considerable amounts of nitrogen is found only in titanium and iron alloys (and constitutes about 15% at), while in aluminum and copper alloys its presence is not significant. The superficial phase analysis (XPS - X-ray Photoelectron Spectroscopy) of the oxygen allowed us to state that the oxygen in pellicle forms three base structures: -O-2(oxide), - OH- (hydroxide), and structures of the type О-С and О-С=О. The chemical analysis showed that the concentration of each of the three components is 0.89:1.00:0.50.

Cuvinte-cheie
electrical discharges in impulse, oxide pellicle, "cold" electrode spot, microhardness, surface roughness