Multifunctional scratch test device for thin film coating

Abstract

The invention provides a multifunctional scratch test device for a thin film coating. The device comprises a computer control device, a base, a support, a load applying device, a camera device, an objective table and a switch, wherein one end of the support and the objective table are arranged on the base; the load applying device and the camera device are connected with the other end of the support and are electrically connected with the computer control device; the switch is arranged on the side surface of the base. The device also comprises a sound emission device, wherein the sound emission device is arranged inside the base and is electrically connected with the computer control device; the sound emission device is used for emitting and acquiring sound wave signals. According to the multifunctional scratch test device, in the process of applying the load to the thin film coating, sound emission signals and intensity of frictional force, and surface feature of a scratched sample are monitored at the same time. A sound emission detection technology, a frictional force distinguishing method and a microscopic image recognition method are synchronously and comprehensively applied, so that break-down points and break-down load of the thin film coating can be accurately distinguished.

Description

technical field [0001] The invention relates to the fields of acoustic emission technology detection, image processing and loading mechanical testing, in particular to a multifunctional film coating scratch test device. Background technique [0002] Coatings and thin films are commonly used surface treatment technologies in engineering materials and structures, and properties such as wear resistance and anti-corrosion are the basis for the wide application of various functional coatings and thin films. The adhesion strength of the coating has become an important issue in the inspection and performance acceptance of related products. There are many methods for testing the adhesion strength of coatings, among which the scratch test method is the most commonly used and stable method at present. The scratch test is to use an indenter with a smooth conical tip to scratch the surface of the coating under gradually increasing load until the coating is damaged, and the applied load...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing scratch test devices can be divided into two situations. One is imported instruments, which usually have many functions, but the cost is expensive, and some applications cannot be expanded due to commercial restrictions; the other is mostly domestic, and the cost is low. Simple or simple

Among the domestic scratch instruments, some instruments can only realize the test of acoustic emission technology or friction method alone

Others have the test functions of acoustic emission technology and friction method, but lack the supporting microscopic observation device; and limited to the structure principle of the instrument, the maximum scratch length is usually short (generally only 10-20mm), which cannot be applied to Measurement of multi-property membrane materials that are increasingly widely used

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