Final Report SBIR Phase I, Improvement of Properties of Tubular Internal-Tin Nb3Sn

Gregory, E.

doi:10.2172/946715

Cited by 1 publication

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Powder-in-tube strands have lower subelement diameters (higher subelement counts) than RIT strands, but the need for very fine powders results in a much higher cost. The Tube Type process, on the other hand, allows for high filament counts with a very simple geometry, and thus has in principle the potential for low cost [13]. In this method the subelement consists of a Cu-clad Sn rod inserted into a Nb tube.…”

Section: Introductionmentioning

confidence: 99%

Critical current densities and microstructures in rod-in-tube and tube type Nb₃Sn strands—present status and prospects for improvement

Sumption

Bhartiya

et al. 2013

Supercond. Sci. Technol.

View full text Add to dashboard Cite

In this work, the transport and magnetization properties of distributed-barrier Rod-inTube (RIT) strands and Tube Type strands are studied. While Tube Type strands had smaller magnetizations and thus better stabilities in the low field region, their 12 T non-Cu J c s were somewhat smaller than those of the RIT strands. Microstructures were investigated in order to find out the reasons for the difference in non-Cu J c values. Their grain size and stoichiometry were found to be comparable, leading to similar layer J c s. Accordingly it was determined that the lower A15 area fraction rather than the quality of A15 layer was the cause of the discrepancy in non-Cu J c . Subsequently, the area utilizations of subelements were investigated. While for a RIT strand the fine grain (FG) A15 area occupies ~60% of a subelement, for a Tube Type strand it is no more than 40%. Further analysis indicates that the low FG area fraction in a Tube Type strand is attributed to its much larger unreacted Nb area fraction. Finally, a simple change in strand architecture is proposed to reduce the unreacted Nb area fraction.

show abstract

Section: Introductionmentioning

confidence: 99%

Critical current densities and microstructures in rod-in-tube and tube type Nb₃Sn strands—present status and prospects for improvement

Sumption

Bhartiya

et al. 2013

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Final Report SBIR Phase I, Improvement of Properties of Tubular Internal-Tin Nb3Sn

Cited by 1 publication

References 8 publications

Critical current densities and microstructures in rod-in-tube and tube type Nb₃Sn strands—present status and prospects for improvement

Critical current densities and microstructures in rod-in-tube and tube type Nb₃Sn strands—present status and prospects for improvement

Contact Info

Product

Resources

About

Final Report SBIR Phase I, Improvement of Properties of Tubular Internal-Tin Nb3Sn

Cited by 1 publication

References 8 publications

Critical current densities and microstructures in rod-in-tube and tube type Nb3Sn strands—present status and prospects for improvement

Critical current densities and microstructures in rod-in-tube and tube type Nb3Sn strands—present status and prospects for improvement

Contact Info

Product

Resources

About

Critical current densities and microstructures in rod-in-tube and tube type Nb₃Sn strands—present status and prospects for improvement

Critical current densities and microstructures in rod-in-tube and tube type Nb₃Sn strands—present status and prospects for improvement