Superconducting magnet is a key component in magnetic resonance imaging (MRI). In general, vacuum pressure impregnation (VPI) technology is used for insulating system of the superconducting magnet. Performance of the superconducting magnets is affected by the adhesion strength between superconducting wires and resins at cryogenic temperature. In this study, experimental superconducting coil was prepared by modified bisphenol-A type epoxy resin and the VPI technology. Tensile, shear, and compressive properties of the samples cut from the superconducting coil were measured at both room temperature (RT) and liquid nitrogen temperature (77 K), and the bonding properties between the superconducting wire and the resin were discussed. The results show that the resin exhibits low viscosity, long pot life and higher mechanical strength, and it is suitable for impregnating superconducting magnets by VPI technology. Moreover, the shear and compressive strength of the impregnated superconducting magnet at 77 K are significantly higher than that at room temperature, with the increase of 132% in radial compressive strength, 170% in axial compressive strength, 63% in radial shear strength and 70% in axial shear strength, respectively. This study provides references for the design of insulation for superconducting magnet system and the manufacture of insulating materials for MRI superconducting magnets.

超导磁体是磁共振成像（MRI）的关键组件。通常，真空压力浸渍（VPI）技术用于超导磁体的绝缘系统。超导磁体的性能受低温下超导线与树脂之间的粘合强度影响。本研究采用改性双酚A型环氧树脂和VPI技术制备实验用超导线圈。在室温（RT）和液氮温度（77 K）下测量从超导线圈切下的样品的拉伸，剪切和压缩性能，并讨论了超导线与树脂之间的粘结性能。结果表明，该树脂具有较低的粘度，较长的适用期和较高的机械强度，它适用于通过VPI技术浸渍超导磁体。而且，浸渍过的超导磁体在77 K时的剪切和抗压强度显着高于室温，其径向抗压强度增加了132％，轴向抗压强度增加了170％，径向抗剪强度增加了63％，而抗压强度增加了70轴向抗剪强度分别为％。该研究为超导磁体系统的绝缘设计和MRI超导磁体的绝缘材料的制造提供了参考。轴向抗压强度为170％，径向抗剪强度为63％，轴向抗剪强度为70％。该研究为超导磁体系统的绝缘设计和MRI超导磁体的绝缘材料的制造提供了参考。轴向抗压强度为170％，径向抗剪强度为63％，轴向抗剪强度为70％。该研究为超导磁体系统的绝缘设计和MRI超导磁体的绝缘材料的制造提供了参考。