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ITER用NbTi超導(dǎo)線材微觀組織及性能
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國(guó)家科技部“973”項(xiàng)目(2005CB724004)；國(guó)際科技合作項(xiàng)目(2007DFA50700)


Microstructure and Properties of NbTi Superconducting Composite Wire for ITER
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    摘要:

    本研究以國(guó)際熱核聚變反應(yīng)堆(International Thermonuclear Experimental Reactor, ITER)磁體極向場(chǎng)用NbTi超導(dǎo)線材的性能優(yōu)化為目的，通過TEM研究熱處理工藝對(duì)NbTi超導(dǎo)線材微觀組織及4.2 K溫度下臨界電流的影響。結(jié)果表明，具有高Jc值的NbTi在4.2 K條件下析出具有典型形貌的α-Ti釘扎中心，即彌散分布于β-NbTi基體上，高度褶皺及卷曲。較高溫度的熱處理有利于4.2 K下Jc的提高，但增加熱處理次數(shù)使Jc值略微降低

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    This paper shows the results of R&D program carried out to optimize NbTi wires for the Poloidal Field (PF) coils of ITER. The influence of heat treatment on the microstructure was investigated by using TEM to find the relations between the microstructure and the critical current densities at 4.2 K for NbTi superconducting composite wire. Typical microstructure (in transverse cross-section) shows α-Ti pinning centers dispersed within the superconducting β-NbTi matrix with strong fold and curl for the NbTi wire with high critical current density at 4.2 K. It is believed that the higher temperature is beneficial to a higher Jc value at 4.2 K, but the Jc values slightly decrease with increasing the heat treatment times

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李建峰,張平祥,劉向宏,李金山,馮 勇,王天成,杜社軍,劉維濤,G. Grunblatt, C. Verwaerde, G. K. Hoang. ITER用NbTi超導(dǎo)線材微觀組織及性能[J].稀有金屬材料與工程,2009,38(2):263~265.[Li Jianfeng, Zhang Pingxiang, Liu Xianghong, Li Jinshan, Feng Yong, Wang Tiancheng, Du Shejun, Liu Weitao, G. Grunblatt, C. Verwaerde, G. K. Hoang. Microstructure and Properties of NbTi Superconducting Composite Wire for ITER[J]. Rare Metal Materials and Engineering,2009,38(2):263~265.]
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  • 收稿日期:2008-05-14
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