Structural Transformation of a (1 – x)Fe2O3–xRuO2 Nanosystem at Different Reduction Temperatures

Голубев, А. В.; Нищев, К. Н.; Beglov, V. I.; Kyashkin, V. M.; Brodskaya, I. G.; Maksimov, Yu. V.; Imshennik, V. K.; Novichikhin, S. V.

doi:10.1134/s1063784220050084

Cited by 2 publications

(1 citation statement)

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“…At the same time, this uneven distribution of the workpiece and wire elements can be explained by sublimation phenomena of the recast layers (similar to laser ablation during heating with the concentrated energy flows such as laser, plasma, electric discharges, fast energy neutral atoms [49][50][51][52]), when components of workpiece material sublimate primarily [53,54]. More refractory components of the secondary material of the second order, such complex compounds as oxides and stoichiometric solid solutions of oxides [29,[55][56][57][58][59], do not entirely sublimate in a single current pulse and remain in the form of a nano scaffold. Secondarily, the sublimated elements of the workpiece, tool electrode, working medium that form low-temperature plasma cloud [60] in the interelectrode gap are deposed partly at the refractory nano scaffold of the secondary material of the second order [21,61,62].…”

Section: Submicrostructure Of Surface and Subsurface Layersmentioning

confidence: 99%

Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water

Grigoriev

Волосова

Okunkova

et al. 2021

Metals

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The material removal mechanism, submicrostructure of surface and subsurface layers, nanotransformations occurred in surface and subsurface layers during electrical discharge machining two structural materials such as anti-corrosion X10CrNiTi18-10 (12kH18N10T) steel of austenite class and 2024 (D16) duralumin in a deionized water medium were researched. The machining was conducted using a brass tool of 0.25 mm in diameter. The measured discharge gap is 45–60 µm for X10CrNiTi18-10 (12kH18N10T) steel and 105–120 µm for 2024 (D16) duralumin. Surface roughness parameters are arithmetic mean deviation (Ra) of 4.61 µm, 10-point height (Rz) of 28.73 µm, maximum peak-to-valley height (Rtm) of 29.50 µm, mean spacing between peaks (Sm) of 18.0 µm for steel; Ra of 5.41 µm, Rz of 35.29 µm, Rtm of 43.17 µm, Sm of 30.0 µm for duralumin. The recast layer with adsorbed components of the wire tool electrode and carbides was observed up to the depth of 4–6 µm for steel and 2.5–4 µm for duralumin. The Levenberg–Marquardt algorithm was used to mathematically interpolate the dependence of the interelectrode gap on the electrical resistance of the material. The observed microstructures provide grounding on the nature of electrical wear and nanomodification of the obtained surfaces.

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