Formation Condition of Fiberform Nanostructured Tungsten by Helium Plasma Exposure
Formation Condition of Fiberform Nanostructured Tungsten by Helium Plasma Exposure
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DOI：
10.1585/pfr.5.s1023
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发表时间：
2010-03
影响因子：
0.8
通讯作者：
W. Sakaguchi;S. Kajita;N. Ohno;M. Takagi;H. Kurishita
中科院分区：
文献类型：
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作者：
W. Sakaguchi;S. Kajita;N. Ohno;M. Takagi;H. Kurishita
在偏滤器等离子体模拟器NAGDIS中，用高密度氦等离子体辐照钨样品，研究了纤维状纳米结构钨的形成条件。实验结果表明，当入射离子能量为50 eV时，形成纳米结构的表面温度阈值约为1000 K。当表面温度高于1000 K时，纳米结构的宽度随表面温度的升高而增大。三个钨样品由不同的程序（超细晶粒钨，ITER参考钨级和粉末冶金钨）制造暴露于氦等离子体。在所有样品上形成纳米结构。
Tungsten samples were irradiated with high density helium plasma in the divertor plasma simulator NAGDIS to investigate the formation condition of the fiberform nanostructured tungsten. Experimental results indicated that the surface temperature threshold for the formation of nanostructure was approximately 1000 K when the incident ion energy was 50 eV. When the surface temperature was above 1000 K, the width of the nanostructure increased with the surface temperature. Three tungsten samples manufactured by different procedures (ultra fine grained tungsten, ITER-reference tungsten grade and powder metallurgy tungsten) were exposed to the helium plasma. The nanostructure was formed on all samples.