Cu-Ag Microcomposite Alloy and Its Applications to Generate Extremely High Magnetic Fields
Cu-Ag Microcomposite Alloy and Its Applications to Generate Extremely High Magnetic Fields
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DOI：
10.2221/jcsj.30.163
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发表时间：
1995-04
期刊：
影响因子：
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通讯作者：
Kiyoshi Inoue;Y. Sakai;T. Asano;H. Maeda
中科院分区：
文献类型：
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作者：
Kiyoshi Inoue;Y. Sakai;T. Asano;H. Maeda
最近，我们成功开发了一种具有高机械强度和高导电性的新型Cu-Ag微复合合金。将Cu-16 at% Ag合金锭在350 ~ 450℃下经多次中间退火后冷加工成线材或板材，其室温抗拉强度为0.7 ~ 1.1 gpa，电导率为75 ~ 83%。这些数值优于Cu-Nb微复合合金。Cu-Ag微复合合金具有优异的机械强度，冷加工面积收缩率超过93%，而Cu-Nb微复合合金要达到这样的机械强度，需要进行超过99.97%面积收缩率的非常重的冷加工。Cu-Ag微复合材料的另一个优点是合金锭易于铸造，从而使微观组织具有优异的均匀性，从而使合金丝和合金板具有良好的性能。我们将铜银微复合合金线缠绕在几个脉冲磁体上。其中一种在10mm孔径中产生73.4T，持续时间为5msec。另一个在16mm口径中产生了65.3T，持续时间为100msec。目前正在与弗朗西斯·斯比特国家磁铁实验室和国家强磁场实验室合作进行铜银微复合合金片作为苦磁片的可行性研究。将Cu-Ag微复合合金苦片插入FBNML杂化III的最高场区，可产生35.2T的稳定场。在撰写本文时，这些脉冲场和稳定场都是世界纪录。
Recently, we successfully developed a new Cu-Ag microcomposite alloy with a promising combination of high mechanical strength and high electrical conductivity. When a Cu-16 at% Ag alloy ingot was cold-worked into a wire or a sheet with several times of intermediate annealing at 350-450°C, it shows high conductivity of 75-83% IACS and a high tensile strength of 0.7-1.1GPa at room temperature. These values are superior to those of Cu-Nb microcomposite alloy. The Cu-Ag microcomposite alloy shows excellent mechanical strength with cold work of over 93% areal reduction ratio, while a very heavy cold work of more than 99.97% areal reduction ratio is necessary for realizing such mechanical strength in the Cu-Nb microcomposite. A further advantage of the Cu-Ag microcomposite is easy casting of the alloy ingot, resulting in excellent homogeneity of the microstructure and, therefore, the properties in the alloy wire and sheet. We wound the Cu-Ag microcomposite alloy wire into several pulsed magnets. One of them generated non-destructively 73.4T with duration time of 5msec in a 10mm bore. An other one generated non-destructively 65.3T with duration time of 100msec in a 16mm bore. The feasibility study of the Cu-Ag microcomposite alloy sheet as Bitter magnet sheets is progressing now in collaboration with the Francis Bitter National Magnet Laboratory and the National High Magnetic Field Laboratory. A steady field of 35.2T could be generated by inserting the Cu-Ag microcomposite alloy Bitter sheets into the highest-field region in Hybrid III of FBNML. These pulsed fields and the steady one are world records as of this writing.