Recent progress of thick tungsten coating prepared by chemical vapor deposition as the plasma-facing material
| العنوان: | Recent progress of thick tungsten coating prepared by chemical vapor deposition as the plasma-facing material |
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| المؤلفون: | Z. Chen, J. Song, J. Wang, X. Ye, G.H. Lu, Z. Wang, Y. Tan, M. Xu, X.R. Duan, Y. Lian, Y. Li, L. Cheng, B. Yan, X. Liu, F. Feng, Thomas Morgan |
| المساهمون: | Science and Technology of Nuclear Fusion |
| المصدر: | Nuclear Fusion, 61, 126024 Nuclear Fusion, 61(12):126024. Institute of Physics |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Heat load, Nuclear and High Energy Physics, D plasma, Materials science, Mockups, Metallurgy, chemistry.chemical_element, Chemical vapor deposition, PFM, Tungsten, engineering.material, Condensed Matter Physics, chemistry, Coating, CVD-W, engineering, Plasma-facing material |
| الوصف: | Chemical vapor deposition (CVD) is a promising technique for the preparation ofW-based plasma-facing materials (PFMs). An overview of the microstructure, chemical composition, thermal conductivity, thermal stability, thermal shock performance under disruption-like and edge localized mode-like transient heat load, and neutron irradiation performance of CVD-W has been given in our previous work. However, for fusion applications, additional properties need to be assessed. To this end, deuterium (D) permeability, D plasma irradiation performance, and thermal fatigue resistance of CVD-W were investigated in this work. The results showed that the D permeability of CVD-W in the temperature range of 973-1173 K was larger than that of the commercial pureW, which was related to the columnar grain structure of CVD-W. Additionally, both CVD-W and commercial pure W were exposed to D plasma up to a fluence of 1 × 1026m-2. Compared to commercial pure W, CVD-W exhibited a mitigated blistering behavior and lower D total retention, which could be attributed to its strong [001] crystallographic texture along the thickness direction and a lower number of defect density (e.g. grain boundaries). CVD-W and commercial pureW were also exposed to steady-state and transient heat load simultaneously, leading to a base surface temperature and surface temperature increase of about 953-1473 K and 250-300 K, respectively. A strong grain orientation dependence of the surface degradation induced by the combined heat load has been found. Consequently, CVD-W exhibited a much more uniform plastic deformation than pureW, and no surface cracks along grain boundaries were observed in CVD-W. Finally, the industrial-scale production of CVD-W-based PFMs and mockups was demonstrated. This work paves the way for the fusion applications of thick CVD-W coatings. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0029-5515 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20065b8bbad2a9c33b296ffc217a8b10 http://www.scopus.com/inward/record.url?scp=85119038560&partnerID=8YFLogxK |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....20065b8bbad2a9c33b296ffc217a8b10 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00295515 |
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