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作者： J.L.Chen J.G.Li Institute of plasma Physics,Chinese Academy of Sciences,Hefei 230031,P.R.China

plasma-facing components (PFCs) of fusion reactors will be operated in an environment which comprises incident particles and heat flux from the plasma.The surface of the plasma-facing material (PFM) is subjected to erosion by energetic ions and neutral atoms escaping from the plasma.In addition,high transient heat loads during strong edge

关键词： plasma facing materials fusion reactors heat flux erosion impurity

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W fuzz layers:very high resistance to sputtering under fusion-relevant He+irradiations

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plasma Science and Technology 2022年第1期24卷 165-176页

作者：范红玉牛春杰李晓萍刘伟峰张洋倪维元张映辉刘璐刘东平 Günther BENSTETTER 雷光玖牛金海 Liaoning Key Laboratory of plasma Technology Dalian Minzu UniversityDalian 116600People's Republic of China School of Electrical Engineering Dalian University of TechnologyDalian 116024People's Republic of China Department of Physics Dalian Maritime UniversityDalian 116026People's Republic of China Xi’an Rare Metal materials Institute Co. LtdXi’an 710000People’s Republic of China Faculty of Electrical Engineering and Media Technology Deggendorf Institute of TechnologyDeggendorf D-94469Germany Southwestern Institute of Physics Chengdu 610225People's Republic of China

In this study,we have modeled the sputtering process of energetic He;ions colliding with W nano-fuzz materials,based on the physical processes,such as the collision and diffusion of energetic particles,sputtering and redeposition.Our modeling shows that the fuzzy nanomaterials with a large surface-to-volume ratio exhibit very high resistance to sputtering under fusion-relevant He;irradiations,and their sputtering yields are mainly determined by the thickness of fuzzy nano0materials,the reflection coefficients and mean free paths of energetic particles,surface sputtering yields of a flat base material,and the geometry of nano-fuzz.Our measurements have confirmed that the surface sputtering yield of a W nano-fuzz layer with the columnar geometry of nano-fuzz in cross-section is about one magnitude of order lower than the one of smooth W substrates.This work provides a complete model for energetic particles colliding with the nano-fuzz layer and clarifies the fundamental sputtering process occurring in the nano-fuzz layer.

关键词： plasma facing materials W nano-fuzz surface sputtering simulation model

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维普期刊数据库

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Surface Cracking Behaviors of Ultra-Fine Grained Tungsten Under Edge plasma Loading in the HT-7 Tokamak

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plasma Science and Technology 2013年第6期15卷 605-608页

作者：朱大焕刘洋陈俊凌周张健鄢容 Institute of plasma Physics Chinese Academy of Sciences University of Science and Technology Beijing

Tests of the candidate plasma facing materials（PFMs） used in experimental fusion devices are essential due to the direct influence of in-situ plasma loading.A type of ultrafine grained（UFG） tungsten sintered by resistance sintering under ultra-high pressure（RSUHP） method has been exposed in the edge plasma of the HT-7 tokamak to investigate its performance under plasma loading.Under cychc edge plasma loading,the UFG tungsten develops both macro and micro cracks.The macro cracks are attributed to the low temperature brittleness of the tungsten material itself,while the micro cracks are generated from local intense power flux deposition.

关键词： ultra-fine grain tungsten plasma facing materials cracking behaviors plasma irradiation

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Crack Characteristic Measurement in Beryllium after Thermal Shock

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Rare Metals 1998年第1期17卷 17-22页

作者：钱蓉晖 Farschungszentrum Juelich Euratom-association 德国

he numbers and distribution of cracks in bulk beryllium which was loaded by intense electron beam were observed by optical image analysis, where the crack characteristic measurement and analysis were performed. The results show that: 1) The crack numbers in TR30 of beryllium with fine grain size and relatively high BeO content (no more than 3%) are about 2～4 times more than that in DShG200 of beryllium, whose grain size is larger but BeO content is less than 0.8%, under the same electron beam loading conditions, the ceramic phase of BeO in beryllium makes beryllium more brittle. 2) The successive electron pulse irradiation results in the wider cracks since the cracks formed by the former shot might be enlarged by following shots. The reason might be that there was a stress concentration at original cracks when the second shot came and so that thermal stress raised. DShG200 exhibit the better thermal shock resistance than that of TR30.

关键词： Crack distribution Image analysis plasma facing materials Thermal shock resistance

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