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Rapid sample preparation device and method for coating bonding strength test sample

A combination of strength and sample testing technology, applied in the field of coating materials and spraying technology, can solve the problems of incomplete sample length, difficulty in increasing speed, and inability to achieve rapid sample preparation and consistency of finished products. Speed ​​and consistency issues, the effect of increasing sample preparation speed and improving consistency

Pending Publication Date: 2021-07-16
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the sample preparation process, the length of the sample is not exactly the same, the matrix block of the sample and the loading block are required to be coaxial, and the contact pressure when the E-7 glue is cured must reach 0.05Mpa. These three factors affect the accuracy and speed of sample preparation. The currently known sample preparation methods have trade-offs and compromises in accuracy and speed. It is difficult to increase the speed under the premise of ensuring accuracy, and it is also impossible to achieve rapid sample preparation while ensuring the consistency of the finished sample preparation.

Method used

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  • Rapid sample preparation device and method for coating bonding strength test sample
  • Rapid sample preparation device and method for coating bonding strength test sample
  • Rapid sample preparation device and method for coating bonding strength test sample

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Experimental program
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Effect test

Embodiment

[0071] Two groups of coating bonding strength test samples were prepared by using the method of the present invention and the traditional method respectively, with 5 samples in each group, and the coating parameters of all samples were consistent. Use a universal mechanical testing machine to generate two tension-displacement curves according to the thermal spraying-tensile bond strength measurement standard (GBT8642-2002) ( Figure 5 , Figure 6 ). Through data processing, draw the sample binding strength mean value that uses the inventive method sample preparation to be 35.5Mpa, and variance is 10.6Mpa 2 ; The average value of the bond strength of the sample prepared by the traditional method is 34.6Mpa, and the variance is 85.8Mpa 2 .

[0072] By comparing the mean values ​​and variances of the bonding strengths of the two groups of samples, it can be seen that although the method of the present invention is used to prepare samples, although the bonding strength of the c...

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Abstract

The invention discloses a rapid sample preparation device and method for a coating bonding strength test sample, the rapid sample preparation device comprises a base, a baffle plate and a spring sleeve pressurization mechanism, the base is provided with a positioning groove, and the baffle plate and the spring sleeve pressurization mechanism are sequentially arranged at intervals along the length direction of the positioning groove; during working, a base block and a loading block are sequentially arranged in the positioning groove between the baffle plate and the spring sleeve pressurizing mechanism. According to the invention, the sample preparation speed is improved on the premise of ensuring the precision of the sample preparation finished product, and the consistency of the sample preparation finished product is improved.

Description

technical field [0001] The invention relates to the technical field of coating materials and spraying techniques, in particular to a rapid sample preparation device and method for testing samples of coating bonding strength. Background technique [0002] In surface engineering applications, coatings are widely used to protect the base material. For the coating / matrix material in practical application, its service life depends largely on the life of the coating, and the most typical failure mode of the coating is peeling, so the interfacial bonding strength of the coating / matrix material has an important influence on the overall Service life is greatly affected. Based on the importance of coating bonding strength in practical applications, it is very necessary to characterize and evaluate it. [0003] According to the thermal spraying-tensile bonding strength measurement standard (GBT 8642-2002), the sample shape is a cylinder of Φ25mm or Φ40mm. During the sample preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/44
CPCG01N1/286G01N1/28G01N1/44
Inventor 邓龙辉曹学强蒋佳宁董淑娟刘俐袁洁燕卢祥荣胡庆
Owner WUHAN UNIV OF TECH
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