Frictional coefficients of structural materials in AC superconducting coils Original Research Article

Dyneema® and glass fiber reinforced plastics (DGFRPs) expand when they are cooled down to cryogenic temperature. Therefore, they may have applications as structural materials in superconducting magnets to increase stability against abrupt motion of superconductors in the magnets. To obtain the mechanical properties of DGFRPs, we measured coefficients of friction on surfaces of DGFRPs under various experimental conditions at three temperatures, four different forces, and two types of DGFRPs. In all of the experimental conditions, the measured coefficients of friction were quite low. The range of measured coefficients was 0.07–0.14.