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Measuing and testing techniques for detecting adhesive strength of diamond coat by method of innor expand and bubbling

A diamond coating and testing technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of limitations, incapability of accurate quantitative detection of matrix shape, etc., and achieve significant economic benefits Effect

Inactive Publication Date: 2004-10-27
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0003] In order to overcome many deficiencies such as the inability of the existing diamond coating adhesion strength detection method to carry out accurate quantitative detection and the limitation by the shape of the substrate, the present invention provides a method for measuring internal swelling and bubbling, which can not only accurately and quantitatively measure the diamond coating Adhesion strength, and not limited by the shape of the substrate, can be easily used to measure the adhesion strength of diamond coatings on substrates with complex shapes

Method used

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  • Measuing and testing techniques for detecting adhesive strength of diamond coat by method of innor expand and bubbling
  • Measuing and testing techniques for detecting adhesive strength of diamond coat by method of innor expand and bubbling

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Embodiment Construction

[0012] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings. As shown in Fig. 1 and Fig. 2, the specific implementation of the present invention can be carried out according to the following steps:

[0013] Step 1: According to the technical principles of this invention, a complete set of internal expansion and bubbling measurement system has been developed, which mainly includes a measurement base 9, a He-Ne laser interferometry system 4, a pressure measurement system 7 and a pressure feed system 8, where the He-Ne laser interferometry system 4, the pressure measurement system 7 and the pressure feed system 8 can use existing products on the market to reduce the cost of the entire system and shorten the product development cycle. The measurement base 9 is a cube platform with a side length of 7 cm made of a plexiglass block. Four holes are opened in the center of the four sides of the cube. The bott...

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Abstract

A window cavity is made on back face of basal body of diamond coat through chemical corrosion, microprocessing or other method in order to expose inner surface, which is contacted to basal body before window cavity is made. Pressure is applied to the coat by using pressure oil through window cavity. The coat is deformed under action of even load. Based on Pascal law and theory of plate and shell, theoretical model of inner expand and bubbling method for detecting adhesive strength of coat is deduced, and calculating program is converted from the said model. Thus, testing the deformation of diamond coat and relevant pressure can calculate out adhesive strength of diamond coat. The method calculates strength with accuracy without limit of shape of basal body and magnitude of intensity.

Description

technical field [0001] The invention relates to a test technology for quantitatively detecting the adhesion strength of diamond coatings on various shapes of cemented carbide tool substrates, in particular to a test technology for accurately quantitatively detecting the adhesion strength of diamond coatings by using the internal expansion bubbling method, which belongs to mechanical cutting The technical field of coating tool coating performance testing. Background technique [0002] Diamond has become an ideal tool material due to its excellent properties such as high hardness, high thermal conductivity, low friction coefficient, low thermal expansion coefficient, and good chemical stability. It has been widely used in the field of diamond-coated cutting tools, but it has not yet Realize large-scale production. One of the main reasons is that there is no uniform standard for evaluating the intrinsic quality (mainly mechanical properties) of diamond coatings. The existing ...

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Application Information

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IPC IPC(8): G01N3/10G01N19/04
Inventor 陈明孙方宏张志明简小刚马玉平
Owner SHANGHAI JIAO TONG UNIV
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