STUDY OF THE INFLUENCE OF VARIATION OF PHASE COMPOSITION OF COMPOSITE CERAMICS ON RESISTANCE TO RADIATION DAMAGE DOI
Аrtem L. Kozlovskiy,

Serik B. Azambayev,

A. M. Abshukirova

et al.

NNC RK Bulletin, Journal Year: 2024, Volume and Issue: 4, P. 164 - 173

Published: Dec. 30, 2024

The paper presents the results of investigation influence variation phase composition composite (1−x)Si 3 N 4 – xAl 2 O ceramics on stability strength properties in case irradiation with heavy ions Xe 23+ (230 MeV) at fluences10 11 –10 14 ions/cm . component concentration was chosen taking into account possibility obtaining different ratio: Si , Al as well (SiO )O and SiO formation which is associated processes thermal decomposition during high-temperature annealing an oxygen-containing atmosphere transformations by type solid solution formation. choice for conditioned possibilities simulation structural damage leading to unstrengthening damaged layer, comparable impact nuclear fuel fission fragments materials inert matrices dispersed fuel. In course conducted studies, it established that fluences 10 12 ion/cm changes single isolated structurally deformed inclusions do not lead significant characteristics ceramics, while small observed are deformation distortions, accumulation leads destabilization layer. higher (above10 ), characterized effects overlapping defect regions 0,4 0,6 which, according X-ray analysis data, dominant )O, presence causes a large number grain boundaries, turn dislocation hardening restraint disordering distortions

Language: Английский

Wear Resistance of Ceramic Cutting Inserts Using Nitride Coatings and Microtexturing by Electrical Discharge Machining DOI Creative Commons
М. A. Volosova, Anna A. Okunkova,

Elena Y. Kropotkina

et al.

Eng—Advances in Engineering, Journal Year: 2025, Volume and Issue: 6(1), P. 11 - 11

Published: Jan. 9, 2025

Today, the machining of heat-resistant alloys based on triple, quad, or penta equilibria high-entropy alloy systems elements (ternary, quaternary, quinary iron-, titanium-, nickel-rich alloys), including dual-phase by Gibb’s phase rule, steels austenite class, and nickel- titanium-based alloys, are highly relevant for airspace aviation industry, especially production gas turbine engines. Cutting tools in contact with those should withstand intensive mechanical thermal loads (tense state 1.38·108–1.54·108 N/m2, temperature up to 900–1200 °C). The most spread material is cutting ceramics oxides, nitrides transition post-transition metals, metalloids. This work considers wear resistance insert silicon nitride two unique development coatings — titanium–zirconium coating (Ti,Zr)N complex quad TiN content 70% (Ti,Al,Cr,Si)N a thickness 3.8–4.0 µm which microtextures were produced assisted electric discharge electrode-tool ø0.25 mm. three parallel microgrooves R0.13+0.02 mm at depth 0.025−0.05. operational life was increased ~1.33 when failure criterion turning nickel 0.4

Language: Английский

Citations

1
Radiation-induced degradation effects of optical properties of MgO ceramics caused by heavy ion irradiation DOI Creative Commons
Maxim V. Zdorovets, Аrtem L. Kozlovskiy, G.Zh. Moldabayeva

et al.

Optical Materials X, Journal Year: 2025, Volume and Issue: unknown, P. 100406 - 100406

Published: Feb. 1, 2025

Language: Английский

Citations

0
Study of the effect of phase formation processes on the change in optical and thermal properties of Nd2Zr2O7 ceramics with a pyrochlore structure DOI Creative Commons
Artem L. Kozlovskiy, Dmitriy I. Shlimas, Natalia Volodina

et al.

Optical Materials X, Journal Year: 2025, Volume and Issue: unknown, P. 100410 - 100410

Published: March 1, 2025

Language: Английский

Citations

0
STUDIES OF THE INFLUENCE OF TEMPERATURE FACTORS ON THE RATE OF STRUCTURAL DAMAGE ACCUMULATION IN COMPOSITE CERAMICS DOI
Аrtem L. Kozlovskiy,

Serik B. Azambayev,

Inesh Kenzhina

et al.

NNC RK Bulletin, Journal Year: 2025, Volume and Issue: 1, P. 121 - 131

Published: April 1, 2025

The paper considers the influence of temperature heating under irradiation by heavy ions composite ceramics on processes structural unstrengthening and disordering caused accumulation radiation damage. variation in ranged from 300 to 1000 K, which made it possible simulate damage that were as close real operating conditions. studies revealed a direct correlation between changes degree bending strength disorder amount volume-strain swelling crystal structure, well contribution thermal effects degradation properties ceramics. According obtained data, is established increase concentration amorphous inclusions damaged layer, presence has dependence both fluence temperature, leads more expressed characteristics, indicating destabilization resistance at high-dose irradiation. Moreover, case considering applicability these inert matrix materials requires consideration while predicting their operation lifetime. It was determined distinct properties, particular, decrease hardness fluences 10 13 –10 14 ion/cm 2 , exceeds permissible values 5% initial values.

Language: Английский

Citations

0
STUDY OF THE INFLUENCE OF VARIATION OF PHASE COMPOSITION OF COMPOSITE CERAMICS ON RESISTANCE TO RADIATION DAMAGE DOI
Аrtem L. Kozlovskiy,

Serik B. Azambayev,

A. M. Abshukirova

et al.

NNC RK Bulletin, Journal Year: 2024, Volume and Issue: 4, P. 164 - 173

Published: Dec. 30, 2024

The paper presents the results of investigation influence variation phase composition composite (1−x)Si 3 N 4 – xAl 2 O ceramics on stability strength properties in case irradiation with heavy ions Xe 23+ (230 MeV) at fluences10 11 –10 14 ions/cm . component concentration was chosen taking into account possibility obtaining different ratio: Si , Al as well (SiO )O and SiO formation which is associated processes thermal decomposition during high-temperature annealing an oxygen-containing atmosphere transformations by type solid solution formation. choice for conditioned possibilities simulation structural damage leading to unstrengthening damaged layer, comparable impact nuclear fuel fission fragments materials inert matrices dispersed fuel. In course conducted studies, it established that fluences 10 12 ion/cm changes single isolated structurally deformed inclusions do not lead significant characteristics ceramics, while small observed are deformation distortions, accumulation leads destabilization layer. higher (above10 ), characterized effects overlapping defect regions 0,4 0,6 which, according X-ray analysis data, dominant )O, presence causes a large number grain boundaries, turn dislocation hardening restraint disordering distortions

Language: Английский

Citations

1