Preparation of High Purity Niobium Ingot for RF Superconducting Cavity

被引：0

作者：

Ren, Junshuai ^{[1
]}

Zhang, Yingming ^{[1
]}

Guo, Xuepeng ^{[1
]}

Xi, Enping ^{[1
]}

Wang, Juan ^{[1
]}

机构：

[1] Northwest Institute for Nonferrous Metal Research, Xi'an,710016, China

来源：

Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2019年 / 48卷 / 02期

关键词：

Ingots - Electron beams - Electron beam melting;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The high purity niobium ingot for RF superconducting cavities was prepared by electron beam melting of more than three times under high vacuum. The obtained high pure niobium ingots have a purity more than 99.99% and an RRR value more than 300. The purity of the niobium ingots has reached the standard specifications of RF superconducting cavities. The RRR value of high purity niobium ingot is mainly affected by interstitial impurities such as H, N, O, and C. With increasing the times of electron beam melting, the interstitial impurities can be removed effectively, and the RRR values increase steadily. RRR value and impurity content should be combined to evaluate the quality of high purity niobium, since the impurity content alone is insufficient. © 2019, Science Press. All right reserved.

引用

页码：688 / 692

共 50 条

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