Interdiffusion in Zr-Mo/W Intermetallics
Intermetallic compounds or solid solutions can form between Zr and Mo/W, in which the multiphase of the diffusion may be influenced by each other. Interdiffusion kinetic data in such intermetallic systems are highly demanded for material design. In this work, solid–solid diffusion couples of Zr-Mo a...
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MDPI AG
2023-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/11/6375 |
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| author | Kaihua Wang Xingwei Liu Tianyu Liu Chuan He Jinxu Liu |
| author_facet | Kaihua Wang Xingwei Liu Tianyu Liu Chuan He Jinxu Liu |
| author_sort | Kaihua Wang |
| collection | DOAJ |
| description | Intermetallic compounds or solid solutions can form between Zr and Mo/W, in which the multiphase of the diffusion may be influenced by each other. Interdiffusion kinetic data in such intermetallic systems are highly demanded for material design. In this work, solid–solid diffusion couples of Zr-Mo and Zr-W were prepared by the fixture method, and the interdiffusion behaviors of Zr-Mo and Zr-W at 1300–1500 °C were systematically investigated. The results showed that the intermetallic compounds Mo<sub>2</sub>Zr/W<sub>2</sub>Zr formed in the Zr-Mo/W diffusion systems. The growth constants of the Mo<sub>2</sub>Zr and W<sub>2</sub>Zr phases varied with temperature in accordance with the Arrhenius relationship, and the activation energies of growth were 109 kJ/mol and 285 kJ/mol, respectively. In addition, (Zr, Mo) solid solution formed between Mo<sub>2</sub>Zr and pure Zr as diffusion proceeded, resulting in a lower chemical potential for the formation of Mo<sub>2</sub>Zr. The den Broeder method was used in calculating the interdiffusion coefficients of the solid solution. The results showed that the interdiffusion coefficient in the (Zr, Mo) solid solution decreased with the increase of Mo concentration. Moreover, the diffusion activation energy of the solid solution was evaluated based on the Arrhenius relationship, and the activation energy was 145–170 kJ/mol when the Mo content was in the range of 2–10 at. %. These diffusion kinetic data provide a reference for the composition design and preparation technic of Zr-based alloys. |
| first_indexed | 2024-03-11T03:12:44Z |
| format | Article |
| id | doaj.art-ab2b6f0211ef47ceab531231e67bf76d |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T03:12:44Z |
| publishDate | 2023-05-01 |
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| series | Applied Sciences |
| spelling | doaj.art-ab2b6f0211ef47ceab531231e67bf76d2023-11-18T07:31:18ZengMDPI AGApplied Sciences2076-34172023-05-011311637510.3390/app13116375Interdiffusion in Zr-Mo/W IntermetallicsKaihua Wang0Xingwei Liu1Tianyu Liu2Chuan He3Jinxu Liu4School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaIntermetallic compounds or solid solutions can form between Zr and Mo/W, in which the multiphase of the diffusion may be influenced by each other. Interdiffusion kinetic data in such intermetallic systems are highly demanded for material design. In this work, solid–solid diffusion couples of Zr-Mo and Zr-W were prepared by the fixture method, and the interdiffusion behaviors of Zr-Mo and Zr-W at 1300–1500 °C were systematically investigated. The results showed that the intermetallic compounds Mo<sub>2</sub>Zr/W<sub>2</sub>Zr formed in the Zr-Mo/W diffusion systems. The growth constants of the Mo<sub>2</sub>Zr and W<sub>2</sub>Zr phases varied with temperature in accordance with the Arrhenius relationship, and the activation energies of growth were 109 kJ/mol and 285 kJ/mol, respectively. In addition, (Zr, Mo) solid solution formed between Mo<sub>2</sub>Zr and pure Zr as diffusion proceeded, resulting in a lower chemical potential for the formation of Mo<sub>2</sub>Zr. The den Broeder method was used in calculating the interdiffusion coefficients of the solid solution. The results showed that the interdiffusion coefficient in the (Zr, Mo) solid solution decreased with the increase of Mo concentration. Moreover, the diffusion activation energy of the solid solution was evaluated based on the Arrhenius relationship, and the activation energy was 145–170 kJ/mol when the Mo content was in the range of 2–10 at. %. These diffusion kinetic data provide a reference for the composition design and preparation technic of Zr-based alloys.https://www.mdpi.com/2076-3417/13/11/6375diffusion coupleZr-based alloysinterdiffusion coefficientsactivation energy |
| spellingShingle | Kaihua Wang Xingwei Liu Tianyu Liu Chuan He Jinxu Liu Interdiffusion in Zr-Mo/W Intermetallics Applied Sciences diffusion couple Zr-based alloys interdiffusion coefficients activation energy |
| title | Interdiffusion in Zr-Mo/W Intermetallics |
| title_full | Interdiffusion in Zr-Mo/W Intermetallics |
| title_fullStr | Interdiffusion in Zr-Mo/W Intermetallics |
| title_full_unstemmed | Interdiffusion in Zr-Mo/W Intermetallics |
| title_short | Interdiffusion in Zr-Mo/W Intermetallics |
| title_sort | interdiffusion in zr mo w intermetallics |
| topic | diffusion couple Zr-based alloys interdiffusion coefficients activation energy |
| url | https://www.mdpi.com/2076-3417/13/11/6375 |
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