Method for detecting defect of light ceramic-based porous composite material based on ultrasonic principle

A technology of composite materials and lightweight ceramics, which can be used in material analysis using sonic/ultrasonic/infrasonic waves, material analysis, solids analysis using sonic/ultrasonic/infrasonic waves, etc. It can solve the problem of low detection efficiency, complex equipment and high investment costs. question

Inactive Publication Date: 2019-01-29
YANSHAN UNIV
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Problems solved by technology

[0004] However, the above-mentioned detection method has complicated experimental equipment, high investment cost, cumbersome operation, and low detection efficiency.

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  • Method for detecting defect of light ceramic-based porous composite material based on ultrasonic principle
  • Method for detecting defect of light ceramic-based porous composite material based on ultrasonic principle
  • Method for detecting defect of light ceramic-based porous composite material based on ultrasonic principle

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the invention.

[0021] Such as figure 1 As shown, a method for detecting defects in light-weight ceramic-based porous composite materials based on ultrasonic principles in this embodiment first needs to build a detection system, which is mainly composed of a computer equipped with a LabVIEW program, an ultrasonic signal generator, and a three-dimensional mechanical scanning device. , a power amplifier, an ultrasonic transmitting probe 2, an ultrasonic receiving probe 3, and a data acquisition card; the three-dimensional mechanical scanning device is composed of two motors and a motor driver, the workpiece 1 is immersed in water, and the ultrasonic tr...

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Abstract

The invention discloses a method for detecting defect of the light ceramic-based porous composite material based on the ultrasonic principle, comprising the following steps of: immersing an ultrasonictransmitter probe and an ultrasonic receiver probe in water at the same time, wherein the ultrasonic transmitter probe and the ultrasonic receiver probe are perpendicular to both sides of the light porous ceramic-based composite material to be detected; the ultrasonic transmitter probe and the ultrasonic receiver probe reciprocating in the x-y direction of the both sides of the light porous ceramic-based composite material to be detected to scan the light porous ceramic-based composite material to be detected, a data acquisition card collecting the ultrasonic signal received by the ultrasonicreceiver probe and transmitting the ultrasonic signal to the computer on which the LabVIEW program is installed; and the LabVIEW performing a maximum projection reconstruction on the obtained data toobtain an ultrasonic C-scan image, which can identify a defect area and complete a material defect detection experiment. Compared to the prior art, the method for detecting defect of light ceramic-based porous composite material based on ultrasonic principle can realize the detection of dangerous defects such as holes, inclusions and debonding in the ceramic-based composite material.

Description

technical field [0001] The invention relates to the technical field of defect detection of lightweight ceramic-based porous composite materials, in particular to a method for detecting defects of lightweight ceramic-based porous composite materials based on the ultrasonic principle. Background technique [0002] Among various types of new aerospace composite materials, fiber rigid ceramic porous composite materials have excellent properties such as light weight, oxidation resistance, high specific strength, high specific modulus, high temperature resistance, creep resistance, good fatigue limit and high wear resistance. Therefore, it has been widely used in aviation and aerospace fields. However, there is still no perfect detection standard and evaluation system for the detection of bonding defects of this type of composite material structure. The bonding quality detection and evaluation of this type of material not only has broad prospects but also has far-reaching signific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/06
CPCG01N29/0645G01N29/069G01N2291/0289
Inventor 张玉燕李永保温银堂张芝威潘钊贾斌付凯
Owner YANSHAN UNIV
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