FUNCTIONALLY GRADED MATERIAL, COIL, INSULATION SPACER, INSULATION DEVICE, AND METHOD FOR MANUFACTURING FUNCTIONALLY GRADED MATERIAL

摘要

Materials in which properties such as permittivity are graded inside the material are referred to as functionally graded materials. Prior-art materials used in functionally graded materials are typically thermosetting resins, and the processes for preparing functionally graded materials by prior-art techniques are complicated. In such preparation processes, furthermore, the direction of the gradient for characteristics such as those involved in the use of centrifugation, depends on the direction of the gravitational force, and limitations are imposed on the molding techniques. These preparation processes are also difficult to adapt to complex shapes. By way of example, the following configuration is accordingly employed for the functionally graded material according to the present invention. A plurality of resin compositions are laminated. Among these resin composition, a first resin composition and a second resin composition adjacent to the first resin composition have differing properties. The interface between the first resin composition and the second resin composition is joined by dynamic covalent bonds.