Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range
Abstract TaB2-SiC coating modified by different content of MoSi2 was fabricated on graphite substrate with SiC inner coating by liquid phase sintering to elevate the anti-oxidation capability of the TaB2-SiC coatings. As compared to the sample with the TaB2—40wt%SiC coating, the coating sample modif...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2020-08-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40145-020-0406-5 |
| _version_ | 1797714671387541504 |
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| author | Xuanru Ren Junshuai Lv Wei Li Yuwen Hu Ke Sun Can Ma Hong’ao Chu Weiguang Wang Leihua Xu Ziyu Li Peizhong Feng |
| author_facet | Xuanru Ren Junshuai Lv Wei Li Yuwen Hu Ke Sun Can Ma Hong’ao Chu Weiguang Wang Leihua Xu Ziyu Li Peizhong Feng |
| author_sort | Xuanru Ren |
| collection | DOAJ |
| description | Abstract TaB2-SiC coating modified by different content of MoSi2 was fabricated on graphite substrate with SiC inner coating by liquid phase sintering to elevate the anti-oxidation capability of the TaB2-SiC coatings. As compared to the sample with the TaB2—40wt%SiC coating, the coating sample modified with MoSi2 exhibited a weight gain trend at lower temperatures, the fastest weight loss rate went down by 76%, and the relative oxygen permeability value reduced from about 1% to near 0. More importantly, the large amount of SiO2 glass phase produced over the coating during oxidation was in contact with the modification of MoSi2, which was proved to be beneficial to the dispersion of Ta-oxides. A concomitantly formed continuous Ta-Si-O-B compound glass layer showed excellent capacity to prevent oxygen penetration. However, when the TaB2 content was sacrificed to increase the MoSi2 content, the relative oxygen permeability of the coating increased instead of decreased. Thus, on the basis of ample TaB2 content, increasing the MoSi2 content of the coating is conducive to reducing the relative oxygen permeability of the coatings in a broad temperature region. |
| first_indexed | 2024-03-12T07:55:23Z |
| format | Article |
| id | doaj.art-f01f8bbb34be487e9025e51cb1eea3f6 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T07:55:23Z |
| publishDate | 2020-08-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-f01f8bbb34be487e9025e51cb1eea3f62023-09-02T20:21:15ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082020-08-019670371510.1007/s40145-020-0406-5Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature rangeXuanru Ren0Junshuai Lv1Wei Li2Yuwen Hu3Ke Sun4Can Ma5Hong’ao Chu6Weiguang Wang7Leihua Xu8Ziyu Li9Peizhong Feng10School of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologySchool of Materials Science and Engineering, China University of Mining and TechnologyAbstract TaB2-SiC coating modified by different content of MoSi2 was fabricated on graphite substrate with SiC inner coating by liquid phase sintering to elevate the anti-oxidation capability of the TaB2-SiC coatings. As compared to the sample with the TaB2—40wt%SiC coating, the coating sample modified with MoSi2 exhibited a weight gain trend at lower temperatures, the fastest weight loss rate went down by 76%, and the relative oxygen permeability value reduced from about 1% to near 0. More importantly, the large amount of SiO2 glass phase produced over the coating during oxidation was in contact with the modification of MoSi2, which was proved to be beneficial to the dispersion of Ta-oxides. A concomitantly formed continuous Ta-Si-O-B compound glass layer showed excellent capacity to prevent oxygen penetration. However, when the TaB2 content was sacrificed to increase the MoSi2 content, the relative oxygen permeability of the coating increased instead of decreased. Thus, on the basis of ample TaB2 content, increasing the MoSi2 content of the coating is conducive to reducing the relative oxygen permeability of the coatings in a broad temperature region.https://doi.org/10.1007/s40145-020-0406-5MoSi2TaB2-SiCcoatingliquid phase sinteringcompound glass layerrelative oxygen permeability |
| spellingShingle | Xuanru Ren Junshuai Lv Wei Li Yuwen Hu Ke Sun Can Ma Hong’ao Chu Weiguang Wang Leihua Xu Ziyu Li Peizhong Feng Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range Journal of Advanced Ceramics MoSi2 TaB2-SiC coating liquid phase sintering compound glass layer relative oxygen permeability |
| title | Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range |
| title_full | Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range |
| title_fullStr | Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range |
| title_full_unstemmed | Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range |
| title_short | Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range |
| title_sort | influence of mosi2 on oxidation protective ability of tab2 sic coating in oxygen containing environments within a broad temperature range |
| topic | MoSi2 TaB2-SiC coating liquid phase sintering compound glass layer relative oxygen permeability |
| url | https://doi.org/10.1007/s40145-020-0406-5 |
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