{"title":"Ex-situ PIT法Nb3Al线材的制备及特性","authors":"恭治 太刀川, 剛史 中陳, 祐哉 池田, 寛之 伊澤, 修 井戸原, 好明 井上","doi":"10.2221/JCSJ.39.645","DOIUrl":null,"url":null,"abstract":"A15 Nb3Al has gained much interests for high-field and large-scale applications due to its excellent critical current density Jc and strain tolerance. However, the shift of Nb3Al composition from stoichiometry at temperatures below 1800°C causes difficulties in the fabrication of conductors with inherent Nb3Al characteristics. In this study, Nb3Al powders prepared by arc melting in an Ar / H2 atmosphere were encased in a sheath and fabricated into tapes through the ex-situ PIT (Powder in Tube) process. The present study revealed that the oxygen content in the Nb3Al powder plays a crucial role in yielding large Jc in the tape. Furthermore, the addition of Ag powder to the Nb3Al powder was found to appreciably enhance the Jc of the tape in lower fields. The superconducting performance of the tapes is discussed in relating to their structures.","PeriodicalId":285677,"journal":{"name":"Teion Kogaku (journal of The Cryogenic Society of Japan)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2004-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ex-situ PIT法 Nb3Al線材の作製と特性\",\"authors\":\"恭治 太刀川, 剛史 中陳, 祐哉 池田, 寛之 伊澤, 修 井戸原, 好明 井上\",\"doi\":\"10.2221/JCSJ.39.645\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A15 Nb3Al has gained much interests for high-field and large-scale applications due to its excellent critical current density Jc and strain tolerance. However, the shift of Nb3Al composition from stoichiometry at temperatures below 1800°C causes difficulties in the fabrication of conductors with inherent Nb3Al characteristics. In this study, Nb3Al powders prepared by arc melting in an Ar / H2 atmosphere were encased in a sheath and fabricated into tapes through the ex-situ PIT (Powder in Tube) process. The present study revealed that the oxygen content in the Nb3Al powder plays a crucial role in yielding large Jc in the tape. Furthermore, the addition of Ag powder to the Nb3Al powder was found to appreciably enhance the Jc of the tape in lower fields. The superconducting performance of the tapes is discussed in relating to their structures.\",\"PeriodicalId\":285677,\"journal\":{\"name\":\"Teion Kogaku (journal of The Cryogenic Society of Japan)\",\"volume\":\"105 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2004-12-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Teion Kogaku (journal of The Cryogenic Society of Japan)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.2221/JCSJ.39.645\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Teion Kogaku (journal of The Cryogenic Society of Japan)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2221/JCSJ.39.645","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
A15 Nb3Al由于其优异的临界电流密度Jc和应变容限，在高场和大规模应用中受到了广泛的关注。然而，在1800°C以下的温度下，Nb3Al成分从化学计量的转变导致了具有固有Nb3Al特性的导体的制造困难。本研究将在Ar / H2气氛中电弧熔化制备的Nb3Al粉末包裹在护套中，并通过非原位PIT (Powder In Tube)工艺制成带状。本研究表明，Nb3Al粉末中的氧含量对带中产生大的Jc起着至关重要的作用。此外，在Nb3Al粉末中添加Ag粉末可以明显提高带的低场Jc。从结构上讨论了超导带的性能。
A15 Nb3Al has gained much interests for high-field and large-scale applications due to its excellent critical current density Jc and strain tolerance. However, the shift of Nb3Al composition from stoichiometry at temperatures below 1800°C causes difficulties in the fabrication of conductors with inherent Nb3Al characteristics. In this study, Nb3Al powders prepared by arc melting in an Ar / H2 atmosphere were encased in a sheath and fabricated into tapes through the ex-situ PIT (Powder in Tube) process. The present study revealed that the oxygen content in the Nb3Al powder plays a crucial role in yielding large Jc in the tape. Furthermore, the addition of Ag powder to the Nb3Al powder was found to appreciably enhance the Jc of the tape in lower fields. The superconducting performance of the tapes is discussed in relating to their structures.
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