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Coating interface bonding strength detection method and equipment

A technology of interface bonding strength and detection method, applied in the direction of measuring devices, instruments, mechanical devices, etc., can solve problems such as deficiencies

Inactive Publication Date: 2019-03-01
CASIC DEFENSE TECH RES & TEST CENT
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Problems solved by technology

The inventors have found that the prior art methods for characterizing and evaluating the bonding properties of coatings have the following defects: although the viewpoint of using the stress intensity factor has been proved to be effective, it is mainly applied to the analysis of interface cracks in macroscopic bulk materials. There are obvious deficiencies in this theory for the interface delamination of coatings or thin film materials at the micro-nano scale

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  • Coating interface bonding strength detection method and equipment
  • Coating interface bonding strength detection method and equipment
  • Coating interface bonding strength detection method and equipment

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Embodiment Construction

[0050] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0051]In view of the shortcomings of the current means of obtaining the characterization index of coating bonding strength, the present application proposes a more suitable analysis method based on the thermodynamic energy balance viewpoint of the Cohesive Zone Model (CZM, Cohesive Zone Model). The finite element simulation practice of thin film delamination failure shows that it can describe the whole process of interface crack initiation and propagation along the interface, and the given interface bonding performance index depends only on the characteristics of the coating material itself, and has nothing to do with the sample geometry. According to the parameter composition of the cohesive zone model, it can quantitativ...

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Abstract

The invention relates to the technical field of coating interface bonding strength detection and discloses a coating interface bonding strength detection method. The method includes steps: on the basis of coating and substrate related data, determining a cohesive zone unit which representing coating interface bonding characteristics; on the basis of a cohesion-opening displacement relation abidedby a cohesive zone and cohesive zone parameters, calculating to obtain a coating bonding strength simulation result; on the basis of comparison between the simulation result and a coating bonding strength testing result obtained through experiments, acquiring coating interface bonding strength description stress indexes and energy indexes. By the coating interface bonding strength detection method, a whole process of interface crack initiation and expansion along an interface can be described, given interface bonding performance representation indexes only depend on intrinsic characteristics of coating materials and are irrelevant with specimen geometry.

Description

technical field [0001] The invention relates to the technical field of coating interface bonding strength performance detection, in particular to a detection method and equipment for coating interface bonding strength. Background technique [0002] In order to meet specific environmental protection and functional requirements, coating and film materials have gradually been widely used in modern power equipment and electronic products. These coating / substrate material systems may be subjected to the combined damage of high temperature, vibration, temperature cycle and other environmental loads for a long time during use. attention. How to accurately characterize and evaluate the bonding performance of the coating, there are currently two main views: one is the stress point of view, that is, the force required per unit area when the coating is peeled off from the substrate, and the bonding strength (including tensile strength) is usually used and shear strength) and stress i...

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Application Information

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IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 赵朋飞
Owner CASIC DEFENSE TECH RES & TEST CENT
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