Unlock instant, AI-driven research and patent intelligence for your innovation.

Laser-electromagnetic ultrasound method and probe device for non-destructive testing of thermal barrier coating

A non-destructive testing and thermal barrier coating technology, which can be used in measuring devices, analyzing solids using sonic/ultrasonic/infrasonic waves, and using sonic/ultrasonic/infrasonic waves for material analysis, which can solve problems such as the lack of perfect non-destructive testing methods

Inactive Publication Date: 2011-04-27
XI AN JIAOTONG UNIV
View PDF3 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For local interface cracks (peeling), etc., there is no perfect non-destructive testing method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Laser-electromagnetic ultrasound method and probe device for non-destructive testing of thermal barrier coating
  • Laser-electromagnetic ultrasound method and probe device for non-destructive testing of thermal barrier coating
  • Laser-electromagnetic ultrasound method and probe device for non-destructive testing of thermal barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The working principle and process of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] refer to figure 1 The main components of the detection probe used in the present invention include a square barrel-shaped housing 1 with both ends of the interior with bosses, a bottom plate 2 made of insulating material, a U-shaped permanent magnet 3 for providing a static magnetic field, and a lower bottom surface A cover plate 4 with a boss, a laser interferometer head (laser receiver) 5 for receiving ultrasonic signals, a signal input port 6 located on the open square barrel-shaped shell 1, and the outer edge of the upper end of the square barrel-shaped shell 1 is uniform There are 4 installation holes 7 for connecting the cover plate 4, and 2 rectangular excitation coils 8 and 9 for generating eddy currents. When in use, a reverse pulse current is applied to the rectangular coils 8 and 9. On the U-shaped perman...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a laser-electromagnetic ultrasound method and a laser-electromagnetic ultrasound probe device for non-destructive testing of a thermal barrier coating. The method for detecting local tiny interface crack and peeling between a ceramic coating and a metal bonding layer of a thermal barrier coating material system comprises the following steps of: for the non-destructive testing of the tiny crack and peeling in the thermal barrier coating structure, adopting at least one permanent magnet or an electric magnet for providing a static magnetic field, excitation coils capable of generating an alternating magnetic field, and a laser interferometer head for receiving an ultrasonic wave signal on the surface of a test piece; and during testing, making a probe close to the surface of the thermal barrier coating material, and directly exciting ultrasonic wave in the metal bonding layer and an alloy base below the ceramic coating of the thermal barrier coating system through an eddy excitation coil and the permanent magnet. Finally, the laser interferometer head connected with a laser interferometer is used for measuring the transmission ultrasonic wave signal from the interior of the metal bonding layer and the alloy base to the ceramic layer through the interface of the ceramic layer and the bonding layer so as to detect the interface crack or peeling between the ceramic layer and the bonding layer.

Description

technical field [0001] The invention relates to non-destructive testing of thermal barrier coating structures, in particular to a laser-electromagnetic ultrasonic method and a probe device for non-destructive testing of thermal barrier coatings. Background technique [0002] The thermal barrier coating (TBC) material system is a multi-layer film structure system that covers the surface of superalloys on industrial gas turbine and aero-engine blades to reduce the operating temperature of the blades and prevent high-temperature corrosion of the blades. The thermal barrier coating material system is usually composed of four material elements, namely ceramic coating, superalloy substrate, metal bonding layer between substrate and ceramic layer, and alumina-based bonding layer formed between ceramic coating and bonding layer. Thermally grown oxide layer of the main material component. Ceramic coating is a heat insulating material, its main function is to form a high temperature ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N29/04G01N29/07G01N29/24G01N21/45G01N27/61
Inventor 陈振茂裴翠祥李红梅
Owner XI AN JIAOTONG UNIV