Ran Hai
Associate Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Gender:Male
Alma Mater:大连理工大学
Degree:Doctoral Degree
School/Department:物理学院
Discipline:Plasma physics
E-Mail:rhai@dlut.edu.cn
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Indexed by:期刊论文
Date of Publication:2017-01-01
Journal:High Temperature Material Processes
Included Journals:EI
Volume:21
Issue:3
Page Number:277-288
ISSN No.:10933611
Abstract:In fusion devices, Plasma Facing Components (PFCs) suffer from damage from high thermal loads and bombardment of the plasma facing component, especially in the region near the divertor. For EAST, most of the surface in the upper divertor was covered with tungsten (W) Monoblock PFCs, by which high heat fluxes could be sustained, while PFCs of W plate fixed on a CuCrZr block have been used in some parts such as the divertor dome and baffles for lower heat loads due to their flexibility. However, sometimes, the CuCrZr block was eroded by intense plasma events like ELMs, VDE, and arcing, leading to the production of massive impurities. In this work, we proposed an approach to solve this problem by coating a W film on the CuCrZr block using the cathodic arc deposition method. The thermal behavior and suitability of the W film as a plasma facing component (PFC) was evaluated by using a DUT-PSI device. The four coatings of different thicknesses were tested under the same parameters. After a thermal test, the coating surface was analyzed by using the scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) technique. The results obtained provided the evidence that the W coating of thickness from 5 μm to 13 μm is capable of resisting a heat flux of up to 1 MW/m2. The coating of thickness 17 μm showed some cracks as a result of the heat flux testing. The formation of cracks was started after the appearance of blisters on the coating surface which weakened the coating and initiated the formation of cracks. The blisters were removed to uncover the erosion. In our study, we found that W coating could be employed to protect the CuCrZr blocks of both the dome and baffle in the upper divertor in the EAST from aggressive heat environment. © 2017 by Begell House, Inc.
海然,副教授,博士生导师,国家重点研发项目负责人,大连市青年科技之星。博士毕业于大连理工大学等离子体物理专业。2014年9月至2016年10月公派赴美国加州大学伯克利分校-劳伦斯伯克利国家实验室进行博士联合培养。
主要从事基于激光光谱技术托卡马克装置内壁状态原位诊断、等离子体与壁材料相互作用研究,同时,包括环境污染、工业样品中多元素成分的远程、实时、定量化激光光谱分析、有机物快速分类等研究工作。在Optics express, Journal of Analytical Atomic Spectrometry, Spectrochimica Acta Part B:Atomic Spectroscopy等国外核心杂志发表SCI论文30余篇,SCI-Q1分区封面论文3篇,已授权发明专利10项;承担国家及省部级科研项目4项,参与重大科研项目多项,是我校牵头的国家重大ITER专项的研究骨干成员。