Manufacturing method of high-temperature speckle

A production method and speckle technology, which is applied in the field of photomechanics and optical device manufacturing, can solve the problems of high temperature resistance, limited displacement information, pre-crack, etc., and achieve the effect of not harsh reaction conditions, simple operation, and easy generation

Active Publication Date: 2010-10-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the physical properties of conventional decorative paints, the spraying method cannot withstand high temperatures. When the temperature is lower than 200°C, the decorative paints will start to change color and become brittle, and even peel off and delaminate. Not only will they become loose with the material, but the measurement results will not reflect the material surface correctly. Deformation information, and the volatilization of decorative paint due to heating will cause violent and unpleasant gas, which will cause great harm to the health of experimenters; on the one hand, the method of engraving a cross on the surface of the material can obtain very limited displacement information, and the accuracy is far inferior to that of spray paint. On the other hand, because the engraved cross itself will damage the material and produce pre-cracks, the real mechanical properties of the original material will inevitably be affected, and in some cases this effect cannot be ignored

Method used

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  • Manufacturing method of high-temperature speckle
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  • Manufacturing method of high-temperature speckle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The material of the test piece is glass sheet, the size is 50mm×25mm×0.2mm. Clean and dry the glass slices; prepare 3 beakers, 3 glass rods, purified water, silver nitrate powder, concentrated ammonia water, and glucose powder; prepare 50 mL of 2% silver nitrate solution with purified water and silver nitrate powder, and use purified water Prepare a 2% ammonia solution with concentrated ammonia water, use pure water and glucose solution with a concentration of 50% glucose powder; add dilute ammonia water drop by drop to the silver nitrate solution while stirring, the silver nitrate solution will appear khaki-yellow precipitate, continue to drop Dilute ammonia water until the khaki precipitate just dissolves; at this time, put a glass piece in the silver nitrate solution after dripping ammonia water; prepare hot water at 60°C; put the beaker containing the silver nitrate solution in hot water to warm ; After warming for a period of time, drop 10mL of glucose solution int...

Embodiment 2

[0027] The material of the test piece is zirconium boride ceramics (ZrB2), and the size is 50mm×7.5mm×7.5mm. Clean and dry the zirconium boride ceramics; prepare 3 beakers, 3 glass rods, purified water, silver nitrate powder, concentrated ammonia water, and glucose powder to prepare 100mL of 10% silver nitrate solution with purified water and silver nitrate powder, and use pure Prepare 10% ammonia solution with water and concentrated ammonia water, use pure water and glucose solution with a glucose powder concentration of 52%; add dilute ammonia water drop by drop into the silver nitrate solution while stirring with a glass rod, the silver nitrate solution will produce at first Brown precipitate, continue to drop dilute ammonia water until the precipitate just dissolves; at this time, put zirconium boride into the silver nitrate solution after dripping ammonia water; prepare 40 ℃ hot water, put the beaker containing silver nitrate solution into the hot Warm the water; after wa...

Embodiment 3

[0028] Embodiment 3: The material of the test piece is an alumina ceramic sheet with a size of 75mm×25mm×2mm. Clean and dry the alumina ceramic sheet; prepare 3 beakers, 3 glass rods, purified water, silver nitrate powder, concentrated ammonia water, and glucose powder; prepare 50 mL of 10% silver nitrate solution with purified water and silver nitrate powder, and use Prepare a 10% ammonia solution with purified water and concentrated ammonia water, use pure water and glucose solution with a concentration of 52% glucose powder; stir while adding dilute ammonia water drop by drop into the silver nitrate solution, the silver nitrate solution will appear earthy brown precipitation, continue Add dilute ammonia water dropwise until the precipitate just dissolves; add 10mL of glucose solution into the silver nitrate solution; put alumina flakes into the silver nitrate solution after dripping ammonia water at this time; put the beaker containing silver nitrate in the In the air at a ...

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Abstract

The invention relates to a manufacturing method of high-temperature speckles, which belongs to the technical fields of optical device manufacture and photomechanics. The invention has the technical characteristic that high-temperature resistant speckles are manufactured on the surface of a material by utilizing a chemical reaction method. Silver speckles can be generated on the surface of the material put into solution which is prepared from silver nitrate powder, ammonia water, glucose powder and purified water according to a proper proportion in a certain temperature environment. The speckles can resist about 900 DEG C of temperature and can be matched with a digital image correlation method to finish the optical measurement of mechanical performance in multiple complicated loaded states, such as heat shock, fracture and the like of the material in a high-temperature environment. The invention has novel thought, simple and flexible operation and strong feasibility.

Description

technical field [0001] The invention relates to a high-temperature speckle manufacturing method, which belongs to the technical fields of optical device manufacturing and photometric mechanics. Background technique [0002] In recent years, the real mechanical properties of materials under high temperature environment have become a very concerned issue in the design of aerospace structures and a key topic in the research of solid mechanics and materials science. In the field of photomechanics technology, speckle is an important carrier for digital image correlation method to measure the deformation of the object surface. The speckle on the surface of the measured object through transfer or direct etching is an important carrier to reflect the deformation information of the object surface. At present, the commonly used speckle production methods are mostly artificial speckle production methods, such as spray paint method and engraved cross method. Due to the physical propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 冯雪王翔张国兵王永戴隆超
Owner TSINGHUA UNIV
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