High-temperature oxidation resistant and corrosion resistant glass ceramic composite coating and preparation technology thereof

A high-temperature oxidation-resistant, glass-ceramic technology, applied in the field of inorganic high-temperature protective coatings, can solve the problem of glass composition for a long time, and achieve the effects of good resistance to constant temperature oxidation, good thermal expansion coefficient, and good resistance to cyclic oxidation.

Active Publication Date: 2013-12-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the adjustment process of the glass composition takes a long time, a process of melting glass block and grinding glaze is required, and there may be contradictions between the optimization of thermal expansion coefficient and the optimization of anti-oxidation and corrosion resistance

Method used

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  • High-temperature oxidation resistant and corrosion resistant glass ceramic composite coating and preparation technology thereof
  • High-temperature oxidation resistant and corrosion resistant glass ceramic composite coating and preparation technology thereof
  • High-temperature oxidation resistant and corrosion resistant glass ceramic composite coating and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Weigh 200g of potassium silicate water glass with a modulus of 3.9, 20g of alumina powder with a particle size of 1-10μm, 60g of quartz powder with a particle size of 1-10μm, and nano-titanium / titanium oxide mixed powder with a peak particle size of 50nm Powder 8g (in this example, the weight ratio of titanium:titanium oxide is 0.2), pre-mix alumina, quartz, nano-titanium / titanium oxide powder, then add the pre-mixed powder to water glass, and add 10g of distilled water to adjust the coating Viscosity makes the paint suitable for spraying after stirring. During the stirring process, ceramic stirring balls with a particle size of 1 mm were added to increase the stirring and dispersing effect. After stirring for 20 minutes at a speed of 2000 rpm in the stirring disperser, the coating was obtained after filtering through a 300-mesh sieve. The paint is sprayed onto the surface of the sandblasted Ti-47Al-2Cr-2Nb alloy parts by spraying. After the sprayed coating is cured at ...

Embodiment 2

[0058] Weigh 100g of potassium silicate water glass with a modulus of 3.9, 10g of alumina powder with a particle size of 1-10μm, 30g of quartz powder with a particle size of 1-10μm, and nano-titanium / titanium oxide mixed powder with a peak particle size of 50nm Powder 4g (in this example, the weight ratio of titanium: titanium oxide is 0.2), pre-mixed alumina powder, quartz powder, nano-titanium / titanium oxide powder, then added the pre-mixed powder to water glass, and added 4g of distilled water Adjust the paint viscosity to make the paint suitable for spraying after stirring. During the stirring process, ceramic stirring balls with a particle size of 1 mm were added to increase the stirring and dispersing effect. After stirring for 20 minutes at a speed of 1500 rpm in the stirring disperser, the coating was obtained after filtering through a 300-mesh sieve. The paint is sprayed onto the surface of the sandblasted Ti-47Al-2Cr-2Nb alloy parts by spraying. After the sprayed coa...

Embodiment 3

[0062] Weigh 150g of potassium silicate water glass with a modulus of 3, 15g of alumina powder with a particle size of 1-10μm, 45g of quartz powder with a particle size of 1-10μm, and nano-titanium / titanium oxide mixed powder with a peak particle size of 70nm Powder 4g (in this example, the weight ratio of titanium: titanium oxide is 0.5), pre-mixed alumina powder, quartz powder, nano-titanium / titanium oxide powder, then added the pre-mixed powder to water glass, and added 5g of distilled water Adjust the paint viscosity to make the paint suitable for spraying after stirring. Add zirconia balls with a particle size of 1 mm to increase the dispersion effect during stirring and dispersing. After stirring for 20 minutes at a speed of 1500 rpm in a stirring dispersing machine, the coating is obtained after filtering through a 200-mesh sieve. The paint is sprayed onto the surface of the sandblasted Ti-6Al-4V alloy parts by spraying. After the sprayed coating is cured at room temper...

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Abstract

The invention relates to an inorganic high temperature protection coating technology, particularly to a high-temperature oxidation resistant and corrosion resistant glass ceramic composite coating which can be used for components made of titanium alloy and other metallic materials and a preparation technology of the composite coating. The coating is formed through uniformly dispersing and distributing micron scale ceramic particle phase and nanoscale metal/oxide mixed powder into a glass matrix phase, the glass matrix phase is formed through performing high temperature conversion on sodium silicate water glass or potassium silicate water glass, the micron phase ceramic particle phase accounts for 15-60 wt% of the glass ceramic composite coating, and the nanoscale metal/oxide mixed powder accounts for 0.5-5 wt% of the glass ceramic composite coating. The coating preparation technology comprises the steps of coating material preparation, coating material spraying and high temperature processing. The glass ceramic composite coating, provided by the invention, is compact, has no holes, has higher strength and breaking tenacity, and has good binding force with a titanium alloy matrix and thermal expansion coefficient matched with the titanium alloy matrix, thereby having excellent anti-thermocycling thermal shock performance, high-temperature oxidation resistance and corrosion resistance.

Description

technical field [0001] The invention relates to an inorganic high-temperature protective coating technology, in particular to a high-temperature oxidation-resistant and corrosion-resistant glass-ceramic composite coating that can be used for titanium alloy and other metal material parts and its preparation process. Background technique [0002] Titanium-based alloys are widely used in aerospace, aviation, navigation and military industries because of their high specific strength and excellent high-temperature performance. However, its insufficient resistance to high-temperature oxidation, hot corrosion resistance, and oxygen embrittlement limit its practical application in high-temperature environments. For example: Ti-6Al-4V and Ti60 alloys, the maximum service temperature is 300 ℃ and 600 ℃ respectively, at higher temperatures, severe oxidation and oxygen embrittlement will occur, resulting in a decline in the mechanical properties of the alloy. The TiAl intermetallic com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23D5/02C03C10/00
Inventor 朱圣龙李文波陈明辉王成王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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