A testing device for interfacial bonding strength of polymer coating materials

Abstract

The invention discloses a polymer coating material interface bonding strength test device, which includes a base body, a fixed base is installed on the end surface of the base body, and a base fixing pin hole is opened in the fixed base from bottom to top. There are Brazilian disc test piece guide rails and tensile plate guide rails in the matrix from top to bottom. The end of the Brazilian disc test piece guide rails and tensile plate guide rails away from the fixed base is an open design. There is an observation window inside and above the guide rail of the Brazilian disc test piece; through the design of this device, the torsion of the test piece during the stretching process can be effectively avoided to ensure the accuracy of the measurement results, and it can pass the Brazilian disc test. The guide rail of the parts can ensure that the microscope does not produce virtual focus during the loading process. This device can also ensure that the interface will not be blocked when the microscope takes images during the variable-angle experiment, which provides a guarantee for the richness of the experiment. .

Description

technical field [0001] The invention belongs to the technical field of experimental mechanical testing devices, and in particular relates to a testing device for interfacial bonding strength of polymer coating materials. Background technique [0002] During the service process of coating materials, the bonding performance between the film and the substrate directly affects the service time of the film, and the anti-corrosion, wear-resistant and anti-oxidation properties of the film will also be affected by the bonding strength. Therefore, the film / The determination of the interfacial bonding strength of the base system is an important part of evaluating the quality of the film. Common methods for determining binding strength can be divided into two categories: loading method and energy method. [0003] Hard coatings such as thermal barrier coatings can be tested using the energy method. The energy method is mainly to obtain the fracture energy when the film is debonded to ...

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Problems solved by technology

[0006] However, there are certain problems with this method. When using a stretching machine to directly stretch the specimen, the specimen may rotate, twist and move out of the plane during the stretching process, which will cause virtual focus of the microscope lens and affect the Second, when measuring at the micro scale, due to the larger pull head of the stretching machine and the smaller size of the specimen, the pull head of the stretching machine may block the interface of the specimen when measuring at a variable angle. phenomenon, so we propose a testing device for interfacial bonding strength of polymer coating materials

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