【作者】 何东； 索红莉； 赵跃； 刘敏； 周婕； 张迎肖； 马麟； 李亚明； 周美玲；

【Author】 HE Dong, SUO Hong-li, ZHAO Yue, LIU Min, ZHOU Jie, ZHANG Ying-xiao, MA Lin, LI Ya-ming, ZHOU Mei-Ling (Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China)

【机构】 国家教育部功能材料重点实验室北京工业大学材料学院；

【摘要】 在本文中,我们采用先进的放电等离子技术 (SPS)制备出中间层为高强度的Ni-12％(原子分数) W合金,外层是Ni-5％(原子分数)W合金的三层复合铸锭,然后用压延辅助双轴织构基底技术 (RABiTSTM)通过冷轧和再结晶退火获得了 Ni5W/Ni12W/Ni5W复合基带。实验结果分析表明,该种复合基带层与层之间结合良好,没有出现由于内外层抗变形能力不同而产生的分层;同时,基带表层的Ni5W 形成了强的立方织构。值得注意的是,作为一种新的复合基带的制备路线,所获得的基带强度较Ni5W有了显著的提高,屈服强度达到了240MPa,是纯Ni基带的5 倍多和已商业应用的Ni5W基带的1．5倍多;另一方面, 由于复合基带芯层为无磁性的Ni12W,使复合基带的磁性有显著下降,其饱和磁化强度只有Ni5W的40％ (77K)。更多还原

【Abstract】 At present, the single-layer of Ni and Ni-W alloy substrates can not satisfy the application of the YBCO coated superconductors, because of their low yield strength and relatively high magnetic performance. In this article, we fabricated a tri-layer of composite alloy ingot using advanced sparking plasma sintering, the outer layers are Ni-5at.%W alloys and the inner layer is Ni-5at.%W alloy. The ingot was cold rolled and annealed to obtain Ni5W/Ni12W/Ni5W composite substrate based on the process of rolling assisted biaxially textured substrates(RABiTS?)technology. The analysis of the experimental results indicated that, the connections between inner and outer layers are very well, and there is no separation observed between the layers resulted from the difference of the resistance distortion during deformation, meanwhile the outer layer has formed very sharp cube texture. It is noted that the yield strength of the as developed composite substrate was increased remarkably compared to that of the Ni5W substrate and reaches 240MPa using this novel route of fabricating the composite substrate. Moreover, due to the use of the nonmagnetic inner core of the Ni12W alloy in this composite substrate, the magnetization of this composite has a distinct decrease at 77K, which is only 40% of the magnetization of the Ni5W substrate at same temperature.更多还原