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

Surface Cracking Behaviors of Ultra-Fine Grained Tungsten Under Edge Plasma Loading in the HT-7 Tokamak
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HT-7 托卡马克边缘等离子体加载下超细晶钨的表面裂纹行为

DOI:
10.1088/1009-0630/15/6/21
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发表时间:
2013-06
影响因子:
1.7
通讯作者:
Yan Rong
Yan Rong
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Liu Yang;Chen Junling;Zhou Zhangjian;Yan Rong

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由于原位等离子体负载的直接影响,对实验聚变装置中使用的候选面向等离子体材料(PFM)进行测试至关重要。将一种采用超高压电阻烧结(RSUHP)方法烧结的超细晶(UFG)钨暴露在HT-7托卡马克的边缘等离子体中,以研究其在等离子体负载下的性能。在循环边缘等离子体负载下,UFG 钨会产生宏观和微观裂纹。宏观裂纹归因于钨材料本身的低温脆性,而微观裂纹则由局部强功率通量沉积产生。
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 ultra-fine 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 cyclic 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.
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