抄録
Nb3Sn in the form of practical superconductors has been avilable for years. At present, the principal techniques employed are bronze and internal tin processes. Nb3Sn has exhibited high performance at high magnetic field. Porosity in the Nb3Sn superconductors is often observed after the reaction treatment and can be detrimental to the mechanical and electrical properties. Voids, probably due to the Kirkendall effect, could be annihilated by heating under high pressure. Therefore, the hot isostatic pressing (HIP) could improve the properties. The author reviewed the effects of HIPping on the porosity and the critical current of Nb3Sn superconductor produced both by the bronze process and internal tin processes.
