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Method for preparing speckle suitable for high temperature environment

A high-temperature environment and speckle technology, which is applied in the field of optical testing, can solve the problems of applicable temperature lower than 1100°C, cumbersome production steps, and high requirements for production equipment, and achieve the effects of simple equipment, easy control of reaction operation, and reduced production costs

Active Publication Date: 2016-01-20
湖南新生代新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the defects that the existing high-temperature speckles have cumbersome manufacturing steps, high requirements for production equipment, and most applicable temperatures are lower than 1100°C. Speckle method, the speckle produced by this method is suitable for non-contact measurement of material deformation by digital image correlation technology in high temperature environment, and has broad application prospects

Method used

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  • Method for preparing speckle suitable for high temperature environment
  • Method for preparing speckle suitable for high temperature environment
  • Method for preparing speckle suitable for high temperature environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The substrate material is a thermal barrier coating prepared by plasma spraying, with a size of 22mm×5mm×2.4mm. The substrate is a high-temperature resistant nickel alloy GH3030 with a thickness of 2mm; the material of the bonding layer is NiCoCrAlY, and the thickness is about 100um; the composition of the ceramic layer is 8wt %Y 2 o 3 -ZrO 2 , and its thickness is about 300um; the specific process of preparing high-temperature speckles on the surface of pure ceramics is as follows:

[0027] 1. First, the pure ceramic sheet is polished, its surface is cleaned, and dried.

[0028] 2. Place the cleaned and dried base material in an evaporating dish.

[0029] 3. Prepare ferric sulfate powder, potassium hydroxide particles, purified water, alcohol lamp, beaker, evaporating dish, glass rod and other experimental items.

[0030]4. Prepare 2mol / LFe with pure water 2 (SO 4 ) 3 Solution 50mL and 3mol / L KOH solution 200mL.

[0031] 5. In Fe 2 (SO 4 ) 3 The KOH solution...

Embodiment 2

[0037] The substrate material is a thermal barrier coating prepared by plasma spraying, with a size of 20mm×5mm×2.3mm. The substrate material is a high-temperature resistant nickel alloy GH3030 with a thickness of 2mm; the material of the bonding layer is NiCoCrAlY, and the thickness is about 100um; the composition of the ceramic layer is 8wt%Y 2 o 3 -ZrO 2 , and its thickness is about 200um; the specific process of preparing high-temperature speckles on the surface of the ceramic layer is as follows:

[0038] 1. First, the ceramic coating sheet is polished, the surface is cleaned, and dried.

[0039] 2. Place the cleaned and dried base material in an evaporating dish.

[0040] 3. Prepare ferric nitrate powder, ammonia solution, purified water, alcohol lamp, beaker, evaporating dish, glass rod and other experimental items.

[0041] 4. Prepare 1.5mol / LFe (NO 3 ) 3 Solution 20mL and 2mol / L ammonia solution 45mL.

[0042] 5. In Fe (NO 3 ) 3 Ammonia solution was gradually...

Embodiment 3

[0048] The base material is a pure ceramic sheet prepared by plasma spraying, and its composition is 8wt% Y 2 o 3 -ZrO 2 , with a size of 14mm×5mm×2mm, the specific process of preparing interface high-temperature speckle is as follows:

[0049] 1. First, the ceramic coating sheet is polished, the surface is cleaned, and dried.

[0050] 2. Place the cleaned and dried base material in an evaporating dish.

[0051] 3. Prepare ferric sulfate powder, sodium hydroxide particles, purified water, alcohol lamp, beaker, evaporating dish, glass rod and other experimental items.

[0052] 4. Prepare 1mol / LFe with pure water 2 (SO 4 ) 3 Solution 10mL and 1mol / L NaOH solution 30mL.

[0053] 5. In Fe 2 (SO 4 ) 3 Gradually drop NaOH solution into the solution to make it all into a reddish-brown ferric hydroxide colloidal solution.

[0054] 6. Let the colloidal solution obtained in step (5) stand for 3 hours, pour off the supernatant, then pour the ferric hydroxide colloid in the low...

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Abstract

The invention discloses a method for preparing speckles suitable for a high-temperature environment. The method comprises the following steps: preparing ferric hydroxide colloid by adopting a ferric salt solution and an aqueous alkali, polishing a substrate material, removing impurities on the surface of the substrate material, placing the treated substrate material into a container with the ferric hydroxide colloid, heating to resolve the ferric hydroxide colloid, depositing generated ferric oxide on the surface of the substrate material, cooling, trimming the surface of the substrate material, carrying out heat treatment on the substrate material under high-temperature environment, and thus obtaining the speckles. The method is easy to operate, simple in used equipment, and low in cost, and the prepared speckles are suitable for performing non-contact measurement on material deformation by utilizing a relevant digital image technology under the high-temperature environment, therefore, the application prospect is wide.

Description

technical field [0001] The invention relates to a method for preparing speckles suitable for high-temperature environments, and belongs to the technical field of optical testing. Background technique [0002] In recent years, the characterization of high-temperature mechanical properties of materials has gradually become a key field of solid mechanics and materials science research, especially the high-temperature mechanical properties of high-temperature components in the aerospace field. Due to the thermal expansion coefficient mismatch between different materials, temperature gradient and other factors, such component materials usually serve in high temperature environment, which is prone to thermal mismatch stress. When the thermal mismatch stress reaches a certain value, it may cause material damage, such as coating peeling and fracture, which will cause great safety accidents and economic losses. Therefore, in a high temperature environment, real-time testing of the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 毛卫国彭樟保戴翠英张人发佀明森方岱宁
Owner 湖南新生代新材料科技有限公司