Initial stages of oxidation of near-stoichiometric titanium carbide at low oxygen pressures
Электронный архив РГППУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Initial stages of oxidation of near-stoichiometric titanium carbide at low oxygen pressures
|
|
| Автор |
Shabalin, I. L.
Vishnyakov, V. M. Bull, D. J. Keens, S. G. Yamshchikov, L. F. Shabalin, L. I. |
|
| Тематика |
GAS-SOLID REACTIONS
KINETICS OXIDATION PHASE TRANSITIONS TRANSITION METAL ALLOYS AND COMPOUNDS ACTIVATION ENERGY DIFFUSION IN SOLIDS DISSOLUTION METAL RECOVERY OXIDATION OXIDE MINERALS OXYGEN PHASE TRANSITIONS SCALE (DEPOSITS) TITANIUM TITANIUM CARBIDE TITANIUM DIOXIDE TITANIUM OXIDES ANATASE - RUTILE TRANSFORMATIONS APPARENT ACTIVATION ENERGIES CHEMICAL KINETICS MODELS GAS DIFFUSIONS GAS-SOLID REACTIONS HIGHER TEMPERATURES INITIAL STAGES LOW OXYGEN PRESSURES MODERATE TEMPERATURES NEGATIVE VALUES OXIDATION MECHANISMS OXIDATION RATES OXIDE PHASE OXIDE SCALE OXYCARBIDE RESIDUAL CARBONS SOLID-STATE DIFFUSIONS TEMPERATURE INCREASE TRANSITION METAL ALLOYS AND COMPOUNDS TRANSITION METAL ALLOYS |
|
| Описание |
A novel approach to the oxidation mechanism of near-stoichiometric TiC is presented. It is confirmed by consideration of solid-state chemical kinetics model and electron microscopy observations in parallel. At low oxygen pressures and moderate temperatures the initial step of the process is connected with the dissolution of oxygen and subsequent decomposition of oxygen-oversaturated oxycarbide, which ultimately results in the nucleation of oxide phase, in particular anatase, belike stabilised by residual carbon. An anatase-rutile transformation is concurrent with deeper carbon burn-off in the oxide scale, which sinters at higher temperatures. This mechanism shifts the process to a gas diffusion regime, governed by the scale permeability, but determined by solid-state diffusion that is reflected in the kinetics, as further temperature increase is accompanied by a decrease of the oxidation rate, so in general the process is characterised by the negative value of apparent activation energy. © 2008 Elsevier B.V. All rights reserved.
|
|
| Дата |
2019-07-17T10:00:18Z
2019-07-17T10:00:18Z 2009 |
|
| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
|
| Идентификатор |
0925-8388
https://www.scopus.com/record/display.uri?origin=resultslist&eid=2-s2.0-61349202979 https://elar.rsvpu.ru/handle/123456789/28145 10.1016/j.jallcom.2008.04.067 61349202979 2-s2.0-61349202979 Institute for Materials Research, University of Salford, Salford, Greater Manchester M5 4WT, United Kingdom Dalton Research Institute, Manchester Metropolitan University, Manchester, M1 5GD, United Kingdom Department of Less-Common Metals, Physico-Engineering Faculty, Ural State Technical University, Yekaterinburg, 620002, Russian Federation Russian State Professional and Pedagogical University, Yekaterinburg, 620012, Russian Federation Scopus Shabalin, I.L., Institute for Materials Research, University of Salford, Salford, Greater Manchester M5 4WT, United Kingdom Vishnyakov, V.M., Dalton Research Institute, Manchester Metropolitan University, Manchester, M1 5GD, United Kingdom Bull, D.J., Institute for Materials Research, University of Salford, Salford, Greater Manchester M5 4WT, United Kingdom Keens, S.G., Institute for Materials Research, University of Salford, Salford, Greater Manchester M5 4WT, United Kingdom Yamshchikov, L.F., Department of Less-Common Metals, Physico-Engineering Faculty, Ural State Technical University, Yekaterinburg, 620002, Russian Federation Shabalin, L.I., Russian State Professional and Pedagogical University, Yekaterinburg, 620012, Russian Federation WOS:000264757200070 000264757200070 |
|
| Язык |
en
|
|
| Права |
Restricted accedd (info:eu-repo/semantics/restrictedAccess)
|
|
| Формат |
text/html
|
|
| Охват |
RSVPU
SCOPUS |
|
| Издатель |
Elsevier BV
|
|
| Источник |
Journal of Alloys and Compounds
|
|
| ##plugins.schemas.dc.fields.audience.name## |
Other
Parents and Families Researchers School Support Staff Students Teachers |
|