GB/T 39685-2020Test method for determining bonding strength of ceramic coatings (English PDF)

1 Scope

This standard specifies a test method for testing the bonding strength of ceramic coatings by loading a cross-bonded sample at room temperature:

The sample preparation, test mode, loading rate, data collection, test report, etc: were standardized:

This standard applies to ceramic coatings coated on the surface of various materials: Various other functional, protective, iconic, decorative, etc:

Layer materials can also be used for reference:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article

Pieces: For undated references, the latest version (including all amendments) applies to this document:

GB/T 16825:1 Inspection of static uniaxial testing machine Part 1: Inspection and test of force measuring system of tensile and (or) compression testing machine calibration

GB/T 21388 Vernier, belt meter and digital depth caliper

GB/T 27668:1 Terms of Microscopy Part 1: Optical Microscopy

3 Terms and definitions

The following terms and definitions apply to this document:

3:1

Ceramiccoating

A ceramic coating layer that is coated on the surface of various substrate materials using physical or chemical processes:

3:2

Maximumtensileload

In the tensile bonding strength test of the coating, the maximum load is applied perpendicular to the coating-substrate interface to the maximum load that the coating and the substrate peel off:

3:3

Tensile bonding strength of cladding

The ratio of the maximum tensile load to the peeling area of the coating from the substrate:

3:4

Maximumshearload

In the coating shear bond strength test, the maximum load that is applied parallel to the coating-substrate interface to the peeling of the coating and the substrate:

3:5

Cladding shear bonding strength

The ratio of the maximum shear load to the peeling area of the coating from the substrate:

4 Test principle

Place the cross-bonded sample in a special fixture in two different ways and apply a load to it to make the coating test strip and the butt bar […]