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Chinese Physics B 2015年第3期24卷 394-397页

作者：郭洪燕葛昌纯夏敏郭立平陈济鸿燕青芝 Institute of Powder Metallurgy and Advanced Ceramics Southwest Jiaotong University Institute of Nuclear materials University of Science and Technology Beijing School of Physics and Technology Wuhan University

Effects of helium implantation on silicon carbide（SiC） and graphite were studied to reveal the possibility of SiC replacing graphite as plasma facing materials. Pressureless sintered SiC and graphite SMF-800 were implanted with He＋ions of 20 ke V and 100 ke V at different temperatures and different fluences. The He^＋ irradiation induced microstructure changes were studied by field-emission scanning electron microscopy（FESEM）, atomic force microscopy（AFM）, and transmission electron microscopy（TEM）.

关键词： plasma facing materials SiC irradiation damage fusion reactor

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 *** cychc edge plasma loading,the UFG tungsten develops both macro and micro *** 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

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

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： Hongyu FAN Chunjie NIU Xiaoping LI Weifeng LIU Yang ZHANG Weiyuan NI Yinghui ZHANG Lu LIU Dongping LIU Günther BENSTETTER Guangjiu LEI Jinhai NIU 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 *** 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 *** 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 *** 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