Composite material with interface enhanced and application thereof

Abstract

The invention provides a composite material with an interface enhanced and application thereof. The composite material comprises a substrate and a thin film layer; the surface of the substrate is provided with micro-nano-scale sunken structures, and the surface, which is provided with the sunken structures, of the substrate is attached to the thin film layer. According to the composite material, the micro-nano-scale sunken structures are machined on the substrate, so that the total contact area between the thin film layer and the substrate is increased, the bonding strength between the thin film layer and the substrate is improved, so that the ability of the composite material to resist generation of cracks during bending is stronger; and through the interface structure that the thin filmlayer and the substrate are mutually crossed, the abrasion resistance of the material is improved, moreover, the residual stress in the material can be reduced or even eliminated, and the service period of the material can be prolonged. The composite material can be used for the fields such as substrates of blue-light LED devices, flexible circuit boards, OLED or QLED packaging, windshield glass,airframes or automobile bodies.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an interface-reinforced composite material and its application. Background technique [0002] Coating technology is widely used in industrial fields. Depending on the coating material, a wide variety of methods can be used, including spray coating, spin coating, pulling, evaporation, sputtering, and chemical vapor deposition. Coating on flexible or hard substrates to form layered composite materials can integrate the properties of different materials to form new properties and applications. [0003] However, since the coating and the substrate are two different materials, and the films produced by various coating technologies have different degrees of stress, including shrinkage stress and expansion stress, which will lead to poor adhesion between the coating and the substrate. Strong, the coating is easy to fall off, peel off or crack, and the life is g...

AI Technical Summary

Problems solved by technology

[0003] However, since the coating and the substrate are two different materials, and the films produced by various coating technologies have different degrees of stress, including shrinkage stress and expansion stress, which will lead to poor adhesion between the coating and the substrate. Strong, the coating is easy to fall off, peel off or crack, and the life is greatly shortened, which brings huge obstacles to practical application

[0004] Moreover, compared with hard substrates, the stability of coatings on flexible substrates will be worse, mainly because the mechanical strength of flexible substrates is low, and large surface stress will cause material deformation. It will be subjected to repeated bending, resulting in fatigue effect, greatly reducing the service life of the coating

[0005] In addition, during the cutting of composite materials, due to the internal stress and low adhesion of the coating, it will also cause the coating to crack or detach from the substrate

During the stretching process, the coating or the substrate will generate cracks, and the propagation of the cracks will cause a large area of ​​the coating to break, and the performance of the material will be reduced or even completely lost.

Images