Thermal shock behaviour of tungsten after high flux H-plasma loading
Thermal shock behaviour of tungsten after high flux H-plasma loading
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DOI：
10.1016/j.jnucmat.2013.08.002
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发表时间：
2013-11
影响因子：
3.1
通讯作者：
M. Wirtz;J. Linke;G. Pintsuk;G. D. Temmerman;G. Wright
中科院分区：
文献类型：
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作者：
M. Wirtz;J. Linke;G. Pintsuk;G. D. Temmerman;G. Wright
先前的研究表明，瞬时热冲击载荷会在钨样品上诱发裂纹网络，特别是在较低的基板温度下。为了获得与下一步热核聚变装置中钨装甲等离子体面对部件的性能更相关的试验条件，在线性等离子体发生器Pilot-PSI和高热通量离子束试验装置Marion中，将钨瓷砖暴露于高通量氢等离子体中。随后，在JUIDITH-1电子束装置上进行了循环瞬变热载荷试验，并对联合试验后的诱发损伤进行了金相、形貌和金相分析。与热冲击加载后的结果和损伤特性的比较表明，高通量氢等离子体预加载对钨的热冲击行为有显著的影响，主要表现在裂纹的距离、宽度、深度和裂纹面积。此外，等离子体参数，特别是加载过程中的脉冲宽度和样品温度，对热冲击加载后的损伤模式有很大的影响。
Previous studies have shown that transient thermal shock loads induce crack networks on tungsten samples especially at low base temperatures. To achieve test conditions which are more relevant for the performance of tungsten-armoured plasma facing components in next step thermonuclear fusion devices tungsten tiles were exposed to high flux hydrogen-plasma in the linear plasma generator Pilot-PSI and the high heat flux ion beam test facility MARION. Subsequently, the cyclic transient heat load tests were done in the electron beam facility JUDITH 1. The induced damages after these combined tests were examined by microscopically means, profilometry and metallography. The comparison of the obtained results and damage characteristics with those obtained after thermal shock loading show that the preloading of tungsten targets with high flux hydrogen-plasma has significant influence on the thermal shock behaviour of tungsten in terms of crack distance, width, and depth as well as cracked area. Furthermore the plasma parameters, in particular pulse duration and sample temperature during loading, have strong impact on the damage pattern after thermal shock loading.