Degradation of Yb–Gd–Ti-Si middle entropy silicides in oxidizing atmosphere
Using arc melting, a novel rare-earth silicide, middle entropy Yb–Gd–Ti-Si, was fabricated for high-temperature material applications. The oxidation behavior of the Yb–Gd–Ti-Si was evaluated through oxidation tests conducted at 1200 °C for 1, 2, 4, and 8 h in air. The oxidation rate at 1200 °C was a...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac6fbc |
| _version_ | 1797746405140332544 |
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| author | Yutaro Arai Ryo Inoue |
| author_facet | Yutaro Arai Ryo Inoue |
| author_sort | Yutaro Arai |
| collection | DOAJ |
| description | Using arc melting, a novel rare-earth silicide, middle entropy Yb–Gd–Ti-Si, was fabricated for high-temperature material applications. The oxidation behavior of the Yb–Gd–Ti-Si was evaluated through oxidation tests conducted at 1200 °C for 1, 2, 4, and 8 h in air. The oxidation rate at 1200 °C was almost the same, regardless of the addition of Ti. The oxidation rate of Yb–Gd–Ti-Si at lower temperatures (600 °C to 900 °C) was lower than that of Yb–Gd–Si. In addition, detailed microstructural observations indicate that the formation of TiO _2 and other oxides in the Yb-Ti–O (Yb–Ti–Si–O) phase suppresses the formation of Yb _2 O _3 , causing a drastic oxidation at intermediate temperatures (600 °C to 900 °C). These results indicate that the addition of Ti to Yb–Gd–Si is effective at preventing the preferential oxidation of the grain boundaries at 600 °C to 900 °C, which is commonly observed in metal silicides. |
| first_indexed | 2024-03-12T15:36:21Z |
| format | Article |
| id | doaj.art-70152e509082417f8de5a085ef2c037d |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:36:21Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-70152e509082417f8de5a085ef2c037d2023-08-09T16:12:19ZengIOP PublishingMaterials Research Express2053-15912022-01-019505651910.1088/2053-1591/ac6fbcDegradation of Yb–Gd–Ti-Si middle entropy silicides in oxidizing atmosphereYutaro Arai0https://orcid.org/0000-0001-8062-0637Ryo Inoue1Department of Materials Science & Technology, Tokyo University of Science , 6-3-1, Niijyuku, Katsushika-ku, Tokyo, 125-8585, JapanDepartment of Mechanical Engineering, Tokyo University of Science , 6-3-1, Niijyuku, Katsushika-ku, Tokyo,125-8585, JapanUsing arc melting, a novel rare-earth silicide, middle entropy Yb–Gd–Ti-Si, was fabricated for high-temperature material applications. The oxidation behavior of the Yb–Gd–Ti-Si was evaluated through oxidation tests conducted at 1200 °C for 1, 2, 4, and 8 h in air. The oxidation rate at 1200 °C was almost the same, regardless of the addition of Ti. The oxidation rate of Yb–Gd–Ti-Si at lower temperatures (600 °C to 900 °C) was lower than that of Yb–Gd–Si. In addition, detailed microstructural observations indicate that the formation of TiO _2 and other oxides in the Yb-Ti–O (Yb–Ti–Si–O) phase suppresses the formation of Yb _2 O _3 , causing a drastic oxidation at intermediate temperatures (600 °C to 900 °C). These results indicate that the addition of Ti to Yb–Gd–Si is effective at preventing the preferential oxidation of the grain boundaries at 600 °C to 900 °C, which is commonly observed in metal silicides.https://doi.org/10.1088/2053-1591/ac6fbcrare earth silicideYb-silicidemiddle entropy materialsoxidation |
| spellingShingle | Yutaro Arai Ryo Inoue Degradation of Yb–Gd–Ti-Si middle entropy silicides in oxidizing atmosphere Materials Research Express rare earth silicide Yb-silicide middle entropy materials oxidation |
| title | Degradation of Yb–Gd–Ti-Si middle entropy silicides in oxidizing atmosphere |
| title_full | Degradation of Yb–Gd–Ti-Si middle entropy silicides in oxidizing atmosphere |
| title_fullStr | Degradation of Yb–Gd–Ti-Si middle entropy silicides in oxidizing atmosphere |
| title_full_unstemmed | Degradation of Yb–Gd–Ti-Si middle entropy silicides in oxidizing atmosphere |
| title_short | Degradation of Yb–Gd–Ti-Si middle entropy silicides in oxidizing atmosphere |
| title_sort | degradation of yb gd ti si middle entropy silicides in oxidizing atmosphere |
| topic | rare earth silicide Yb-silicide middle entropy materials oxidation |
| url | https://doi.org/10.1088/2053-1591/ac6fbc |
| work_keys_str_mv | AT yutaroarai degradationofybgdtisimiddleentropysilicidesinoxidizingatmosphere AT ryoinoue degradationofybgdtisimiddleentropysilicidesinoxidizingatmosphere |