RRR300 superconducting Niobium plate

Scientific research has found that when the temperature of materials is lowered to near absolute zero, the properties of some materials change dramatically and suddenly, turning them into a kind of "superconductor" material with little resistance. The temperature at which a material begins to exhibit this special superconducting property is called the critical temperature, and the critical temperature varies from material to material depending on its properties. But very low temperatures near absolute zero are very difficult to obtain, and people pay an extremely high price for it; The closer you get to absolute zero, the greater the cost. So the requirement for superconducting materials is that the higher the critical temperature, the better. The metallic niobium material has become one of the most important superconducting materials because of its high superconducting transition temperature.

RRR300 superconducting niobium plate, as a kind of superconducting material, is mainly used in the manufacture of superconducting linear accelerator and high-energy particle accelerator. On the one hand, RRR300 superconducting niobium plate material is used in the particle accelerator major scientific projects carried out by top universities and research institutions at home and abroad, and the market demand is very large. Superconducting niobium RRR300 plate, on the other hand, the performance requirements are much higher than ordinary niobium material, use normal niobium material preparation technology can't meet the requirements, especially the RRR value control (Residual Resistivity Residual value refers to the material in the 295 K resistor and the Ratio of 4.2 K resistor, RRR value). For niobium materials, the resistance at 4.2K can be obtained by extrapolating when the material is in a non-superconducting state (e.g. 10K), or by using a superconducting state at 4.2K using high magnetic field epitaxy). However, technical problems such as matching of microstructure and mechanical properties need to be solved by technological research. At the same time, with accelerators at home and abroad.

The continuous advances in research technology correspond to the performance requirements of the RRR300 superconducting Niobium plate, which also continuously improve these needs.Continuous research and optimization on the preparation of RRR300 superconducting niobium plate have been carried out. RRR value, microstructure and mechanical properties of RRR300 superconducting energy plate were tested for its forging, rolling and heat treatment process, so as to achieve the optimal performance matching. Superconducting plate with hardness ≤50 HV, tensile strength between 140 and 175 MPa, yield strength between 50 and 75 MPa, elongation ≥50%, grain size at G=5.5~6.0 grade, and forming process, applied to industrial production.