Coating spraying tooling for sample substrates for in-situ tensile observation of coating materials

Abstract

The invention discloses a coating spraying tool for a sample matrix for in-situ stretching observation of coating materials. The coating spraying tool comprises a first shielding layer, a second shielding layer, a first fixing pin, a second fixing pin and a clamp, the first shielding layer wraps a first fixing section, the second shielding layer wraps a second fixing section, the first fixing pinis inserted into a first positioning hole and penetrates through the first shielding layer, the second fixing pin is inserted into a second positioning hole and penetrates through the second shieldinglayer, the clamp is used for clamping a plurality of sample substrates and enabling the spraying surfaces of the plurality of sample substrates to face towards the same direction. According to the coating spraying tool, the coating can be sprayed on a small-size sample matrix, so that the sample matrix can be placed in a scanning electron microscope to observe, so as to facilitate the analysis ofthe crack initiation and expansion mechanism of the coating material in the stretching process and the damage mechanism of the material.

Description

technical field [0001] The invention relates to the field of coating testing and testing, in particular to a coating spraying tool for a sample substrate used for in-situ tensile observation of coating materials. Background technique [0002] In related technologies, the detection of mechanical properties of coating materials and the exploration of damage mechanisms are usually carried out on a macro scale by using a universal tensile testing machine. The image correlation method measures the strain change on the front surface of the coating. [0003] Since the coating materials are mostly prepared by plasma spraying or physical vapor deposition, due to the particularity of the spraying method, the spraying thickness of the coating material may be limited. For example, the spraying thickness of some ceramic coating materials is generally several In the range of ten microns to several millimeters, due to the small thickness, it is difficult to observe the cracking process of...

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Problems solved by technology

[0003] Since the coating materials are mostly prepared by plasma spraying or physical vapor deposition, due to the particularity of the spraying method, the spraying thickness of the coating material may be limited. For example, the spraying thickness of some ceramic coating materials is generally several In the range of ten microns to several millimeters, due to the small thickness, it is difficult to observe the cracking process of the coating material in detail even with a high-resolution camera at the macro scale, and it is impossible to effectively observe the coating material during the stretching process. The mechanism of crack initiation and propagation in medium and the damage mechanism of materials

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