Niobium alloy is an attractive high temperature material with good high temperature strength and low temperature plasticity. In addition, niobium has a series of excellent properties such as small thermal neutron absorption cross section, resistance to liquid metal corrosion and good superconductivity (such as Nb3Sn intermetallic compound, palladium - misalloy and niob-titanium alloy), which makes niobium alloy considered as one of the most promising high-temperature materials.
Niobium tin superconducting alloy refers to niobium tin superconductor which belongs to A15 intermetallic compound and is a cubic crystal system with critical temperature T= 18.1k and critical magnetic field U=26T(4.2k). Niobium tin superconducting alloy is brittle and difficult to be processed into profiles. Nb3Sn profiles are generally prepared by the method of first forming and then diffusion reaction. New production techniques such as in situ method and plasma spraying can produce Nb3Sn multistrand fine wire complex. Adding titanium to Nb3Sn line can significantly improve the magnetic field strength.
A superconducting material consisting of niobium and tin. Niobium and tin form three mesophase compounds, Nb3Sn, Nb6Sn5 and NbSn2. They are both superconductive. Nb3Sn has the highest superconducting critical temperature Tc= 18.05k and upper critical magnetic field Hc= 22.5t (4.2k). Critical current density Jc about 105A/cm2 (4.2k,10T) Nb3Sn is an Al5 intermetallic compound, cubic crystal system, lattice constant a=529.02 ~ 529.16 PM. The homogeneous region of Nb3Sn is wide, ranging from 17% to 27% (at) Sn. Niobium tin superconducting alloy is brittle and difficult to process. There are diffusion method, in situ method, plasma spraying method and so on. Niobium tin superconducting material has been applied to superconducting magnet.
