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Method and apparatus for measuring sub-static laser scratch of interface jointing strength

A technology of interfacial bond strength and measuring device, which is applied in the direction of measuring device, color/spectral characteristic measurement, mechanical device, etc., can solve the problems of limited thickness of test piece, complex scratch mechanism, and inability to measure soft films, etc., to achieve The measurement is accurate and convenient, the guidance and energy transmission are convenient and fast, and it is convenient to measure the effect of automation

Inactive Publication Date: 2003-03-26
JIANGSU UNIV
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AI Technical Summary

Problems solved by technology

[0008] 2. The scratch mechanism is complex
[0010] 4. It is only suitable for the measurement of hard films, and cannot be measured for soft films; in addition, the film thickness requirement should usually be greater than 2 μm
The disadvantage is that the thickness of the test piece is limited (0.1 ~ 0.2mm), and the surface of the film should be specially treated to form a reflective surface

Method used

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  • Method and apparatus for measuring sub-static laser scratch of interface jointing strength
  • Method and apparatus for measuring sub-static laser scratch of interface jointing strength
  • Method and apparatus for measuring sub-static laser scratch of interface jointing strength

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Embodiment Construction

[0037] The invention proposes a method for measuring the bonding strength of the film base interface. Such as figure 1 As shown, the system involved in this method consists of a scratch system, a specimen fixture system, a detection system, a control system, and a frame.

[0038] The long-pulse infrared laser 20 in the resonant cavity 19 of the scratch laser 1 directly radiates through the incident laser beam optical path system composed of an adjustable diaphragm 18, a beam splitter 16, a light guide system 15 with an attenuator, and a focusing mirror 14. The surface of the thin film sample 11 on the fixture 10, the test piece 11 is composed of a substrate 23 and a thin film 22 on it, and the laser beam 21 is used to quasi-statically heat the surface of the thin film 22 with a thickness of tens of nanometers, and the subsequent heat conduction, A temperature field is formed in the test piece. Due to the difference in thermal expansion coefficient and temperature of the film ...

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Abstract

This invention relates to laser and material performance test using continuous loading long-pulse laser to load a coating or film test subject surface in quasi-stationary state and heat its thin layer (only dozens of nm thick) with laser thermal action and thermal conduction thereafter, to form a temperature field in the subject. When the thermal stress reaches to a certain value on the coating abbesion will heppen to the subject or even warping or scaling due to the difference between coefficient of thermal expansion and the temperature and the feed system makes the subject to do feed movement to form mars on the surfaces. The related laser energy at scaling position at the interface can express the binding strength of the interface to get the binding strength by theory analysis and digital calculation.

Description

technical field [0001] The invention relates to the technical field of laser detection and material performance detection, in particular to a quasi-static laser scratch measurement method and device for interface bonding strength, which is suitable for various hard tool films, decorative film systems, decorative functional films, DLC films, Determination of the interfacial bonding strength of organic polymer materials, composite materials and other types. Background technique [0002] Surface film technology is an important means to improve the surface properties of materials. The so-called film is a general term for surface coating, surface coating or surface modification layer, which is divided into thick film and thin film. It uses a very small amount of materials to endow parts and components with special properties such as wear resistance, corrosion resistance, heat resistance, fatigue resistance, radiation resistance, light, heat, electricity, and magnetism, and plays ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N19/04G01N21/3563G01N21/84
Inventor 冯爱新张永康周明张华琨蔡兰
Owner JIANGSU UNIV
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