Mechanism and kinetics of high-temperature oxidation of medium- and high-entropy carbides in air
Medium- and high-entropy carbides (MECs and HECs) have a wide range of advanced applications and, in many cases, outperform monocarbides. However, the behavior, oxidation mechanisms, and factors defining oxidation resistance of some popular HECs at high temperatures have not been studied in detail y...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S026412752300463X |
| _version_ | 1797794092846940160 |
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| author | Sergey Yudin Alexey Sedegov Dmitry Moskovskikh Sergey Volodko Kirill Kuskov Veronika Suvorova Svetlana Danilova-Tretiak Stepan Vorotilo Andrey Nepapushev Alexander Khort |
| author_facet | Sergey Yudin Alexey Sedegov Dmitry Moskovskikh Sergey Volodko Kirill Kuskov Veronika Suvorova Svetlana Danilova-Tretiak Stepan Vorotilo Andrey Nepapushev Alexander Khort |
| author_sort | Sergey Yudin |
| collection | DOAJ |
| description | Medium- and high-entropy carbides (MECs and HECs) have a wide range of advanced applications and, in many cases, outperform monocarbides. However, the behavior, oxidation mechanisms, and factors defining oxidation resistance of some popular HECs at high temperatures have not been studied in detail yet. In this study, the oxidation behavior of MEC and HECs including (Ta,Ti,Nb,Zr)C, (Ta,Ti,Nb,Zr,Mo)C, (Ta,Ti,Nb,Zr,Hf)C, and (Ta,Ti,Nb,Zr,W)C was investigated under both non-isothermal and isothermal conditions at temperatures up to 1200 °C, and a possible oxidation path was described. It was found that under non-isothermal heating conditions, the oxidation of HECs occurred in three stages, each governed by first-order chemical reactions, and was limited by the formation of ZrO2, Me2Me6O17, and MeMe2O7 oxides, respectively. In the case of isothermal heating, the oxidation of (Ta,Ti,Nb,Zr)C, (Ta,Ti,Nb,Zr,Mo)C, and (Ta,Ti,Nb,Zr,Hf)C follows a logarithmic law and was limited by the formation of a protective Me2Me6O17 layer. In contrast, isothermal oxidation of (Ta,Ti,Nb,Zr,W)C followed a linear law due to the formation of volatile WO3. The results of the study have a high potential for practical application for the production of HEC ceramics for various high-temperature purposes and could be used for further understanding of functional characteristics and development of the new ceramic compositions. |
| first_indexed | 2024-03-13T02:56:44Z |
| format | Article |
| id | doaj.art-a43012b17ad2434998c6ed83d310ec3e |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-13T02:56:44Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-a43012b17ad2434998c6ed83d310ec3e2023-06-28T04:28:36ZengElsevierMaterials & Design0264-12752023-07-01231112048Mechanism and kinetics of high-temperature oxidation of medium- and high-entropy carbides in airSergey Yudin0Alexey Sedegov1Dmitry Moskovskikh2Sergey Volodko3Kirill Kuskov4Veronika Suvorova5Svetlana Danilova-Tretiak6Stepan Vorotilo7Andrey Nepapushev8Alexander Khort9National University of Science and Technology MISiS, Moscow 119049, Russia; Moscow Polytechnic University, Moscow 107023, Russia; Corresponding authors at: National University of Science and Technology MISiS, Moscow 119049, Russia (S. Yudin).National University of Science and Technology MISiS, Moscow 119049, RussiaNational University of Science and Technology MISiS, Moscow 119049, Russia; Corresponding authors at: National University of Science and Technology MISiS, Moscow 119049, Russia (S. Yudin).National University of Science and Technology MISiS, Moscow 119049, RussiaNational University of Science and Technology MISiS, Moscow 119049, RussiaNational University of Science and Technology MISiS, Moscow 119049, RussiaA.V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus, Minsk 220072, BelarusNational University of Science and Technology MISiS, Moscow 119049, RussiaNational University of Science and Technology MISiS, Moscow 119049, RussiaKTH Royal Institute of Technology, SE 100-44 Stockholm, Sweden; Corresponding authors at: National University of Science and Technology MISiS, Moscow 119049, Russia (S. Yudin).Medium- and high-entropy carbides (MECs and HECs) have a wide range of advanced applications and, in many cases, outperform monocarbides. However, the behavior, oxidation mechanisms, and factors defining oxidation resistance of some popular HECs at high temperatures have not been studied in detail yet. In this study, the oxidation behavior of MEC and HECs including (Ta,Ti,Nb,Zr)C, (Ta,Ti,Nb,Zr,Mo)C, (Ta,Ti,Nb,Zr,Hf)C, and (Ta,Ti,Nb,Zr,W)C was investigated under both non-isothermal and isothermal conditions at temperatures up to 1200 °C, and a possible oxidation path was described. It was found that under non-isothermal heating conditions, the oxidation of HECs occurred in three stages, each governed by first-order chemical reactions, and was limited by the formation of ZrO2, Me2Me6O17, and MeMe2O7 oxides, respectively. In the case of isothermal heating, the oxidation of (Ta,Ti,Nb,Zr)C, (Ta,Ti,Nb,Zr,Mo)C, and (Ta,Ti,Nb,Zr,Hf)C follows a logarithmic law and was limited by the formation of a protective Me2Me6O17 layer. In contrast, isothermal oxidation of (Ta,Ti,Nb,Zr,W)C followed a linear law due to the formation of volatile WO3. The results of the study have a high potential for practical application for the production of HEC ceramics for various high-temperature purposes and could be used for further understanding of functional characteristics and development of the new ceramic compositions.http://www.sciencedirect.com/science/article/pii/S026412752300463XHigh-entropy carbidesSelf-propagating high-temperature synthesisPhase compositionOxidationKinetics |
| spellingShingle | Sergey Yudin Alexey Sedegov Dmitry Moskovskikh Sergey Volodko Kirill Kuskov Veronika Suvorova Svetlana Danilova-Tretiak Stepan Vorotilo Andrey Nepapushev Alexander Khort Mechanism and kinetics of high-temperature oxidation of medium- and high-entropy carbides in air Materials & Design High-entropy carbides Self-propagating high-temperature synthesis Phase composition Oxidation Kinetics |
| title | Mechanism and kinetics of high-temperature oxidation of medium- and high-entropy carbides in air |
| title_full | Mechanism and kinetics of high-temperature oxidation of medium- and high-entropy carbides in air |
| title_fullStr | Mechanism and kinetics of high-temperature oxidation of medium- and high-entropy carbides in air |
| title_full_unstemmed | Mechanism and kinetics of high-temperature oxidation of medium- and high-entropy carbides in air |
| title_short | Mechanism and kinetics of high-temperature oxidation of medium- and high-entropy carbides in air |
| title_sort | mechanism and kinetics of high temperature oxidation of medium and high entropy carbides in air |
| topic | High-entropy carbides Self-propagating high-temperature synthesis Phase composition Oxidation Kinetics |
| url | http://www.sciencedirect.com/science/article/pii/S026412752300463X |
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