High-temperature speckle and controllable preparation method

A speckle and high-temperature technology, which is applied in the field of high-temperature speckle and its controllable preparation, can solve the problems of low preparation efficiency, high preparation requirements, and speckle failure, so as to improve low-temperature curing performance, high-temperature resistance, and good high-temperature resistance Performance and high-temperature adsorption performance, the effect of improving the speckle effect

Active Publication Date: 2018-06-22
TSINGHUA UNIV
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Problems solved by technology

[0006] In order to solve the problems of speckle failure, self-toxicity, high preparation requirements and low preparation efficiency caused by the limitation of material selection in the existing high-temperature speckle preparation methods, and it is difficult to control t

Method used

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  • High-temperature speckle and controllable preparation method
  • High-temperature speckle and controllable preparation method
  • High-temperature speckle and controllable preparation method

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Example Embodiment

[0046] In the following, the present invention will be further explained through specific embodiments in conjunction with the drawings.

[0047] Such as figure 1 with 2 As shown, the adjustable preparation method of high-temperature speckle in this embodiment includes the following steps:

[0048] 1) Using the average gray gradient δ f Optimize the actual speckle size and speckle distribution;

[0049] 2) According to the optimized speckle size and distribution, 3D printing technology is used to prepare a speckle template 1 with a speckle pattern. The raised position on the speckle template is the spot where the speckle is located. The material of the speckle template is resin ;

[0050] 3) Process the Inconel 713C nickel-based superalloy test piece to the required size, use sandpaper of different meshes to cross-grind the speckle-coated side of the test piece, and then wipe the surface of the test piece clean and dry with alcohol; The meshes of sandpaper used are 600, 800 and 1000 m...

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Abstract

The invention discloses a high-temperature speckle and controllable preparation method thereof. The high-temperature speckle uses a sodium silicate solution as a matrix, silicon dioxide powder and auxiliary additive powder are added to form a mixed liquid, the characteristics of short curing time, low curing temperature, good high-temperature-resistant performance, no toxicity and environmental protection are achieved, and sodium silicate itself has relatively high high-temperautre-resistant performance and high-temperature adsorption performance, and is suitable for being used for high-temperature speckle manufacture; a speckle template having a speckle pattern is prepared, thereby controlling the speckle size and speckle distribution; the speckle template can be repeatedly used, therebyfurther improving preparation efficiency; and after heating stirring, vacuumizing and gradient warming treatment, occurrence of a speckle bubbling phenomenon can be effectively reduced; materials of the high-temperature speckle are all conventional reagents, and are non-toxic under a normal using condition, thereby facilitating engineering practical application and large-scale manufacture; and thespeckle can meet a non-contact measurement requirement in high-temperature complex environments (thermal shock, and tension and compression deformation).

Description

technical field [0001] The invention relates to engineering materials and photomechanical technology, in particular to a high-temperature speckle and a controllable preparation method thereof. Background technique [0002] At present, many structures including aerospace, nuclear energy, geophysics and other fields face the test of high temperature and complex environment under working conditions. Taking the aero-engine, a key component of an aircraft, as an example, its turbine blades are subjected to high-temperature gas erosion and thermal cycle impact. The deformation behavior assessment of the structure in a high-temperature environment is very important to ensure the overall performance of the engine. At present, the deformation measurement methods in high temperature environment can be divided into two types: contact type and non-contact type according to the measurement form. Compared with the contact deformation measurement method, which requires high temperature re...

Claims

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Application Information

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IPC IPC(8): G01B11/16C04B28/26
Inventor 冯雪岳孟坤方旭飞朱相宇屈哲
Owner TSINGHUA UNIV
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