Composite micro-nanometer zirconia-based high temperature abradable sealed coating material and preparation method thereof

A technology of nano-zirconia and sealing coating, which is applied in the coating, powder coating, etc., can solve the problems of low spraying deposition efficiency, easy block falling off, etc., and achieve good sprayability, suitable holes and density, and deposition Significant effect of efficiency

Inactive Publication Date: 2013-09-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Discussion The high-temperature sealing coatings studied in the past mostly use micron-sized zirconia as a single base phase, or high-temperature sealing coatings with nano-sized zirconia as a single base phase, but the high-temperature sealing coatings with micron-s

Method used

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  • Composite micro-nanometer zirconia-based high temperature abradable sealed coating material and preparation method thereof
  • Composite micro-nanometer zirconia-based high temperature abradable sealed coating material and preparation method thereof
  • Composite micro-nanometer zirconia-based high temperature abradable sealed coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 7.0 kg of nano-scale yttrium oxide partially stabilized zirconia Y-PSZ with a particle size of 20-60 nm, the content of nano-zirconia accounts for 93-95 mol%, the content of nano-yttrium oxide accounts for 5-7 mol%, and the particle size is 0.5-5 μm Grade yttria partially stabilized zirconia Y-PSZ1.8kg, the content of micron zirconia accounts for 93~95mol%, and the content of nanometer yttrium oxide accounts for 5~7mol%. 0.5kg of nano-alumina powder with a particle size of 15-30nm, which is high-temperature stable α-Al 2 o 3 , 0.2 kg of hexagonal boron nitride powder with a particle size of 0.5 to 2 μm, and 0.5 kg of polyphenylene with a particle size of 20 to 38 μm, and mix them uniformly. Take 0.4 kg of dextrin, add it to the raw material powder and mix thoroughly, then add 8.0 kg of distilled water, and stir to form a uniformly dispersed and suspended slurry for use.

[0027] Use a centrifugal atomizing nozzle to atomize the slurry into fine droplets and spray...

Embodiment 2

[0033] Take 6.2 kg of nano-scale yttrium oxide partially stabilized zirconia Y-PSZ with a particle size of 20-60 nm, the content of nano-zirconia accounts for 93-95 mol%, the content of nano-yttrium oxide accounts for 5-7 mol%, and the particle size is 0.5-5 μm Grade yttrium oxide partially stabilized zirconia Y-PSZ1.9kg, the content of micron zirconia accounts for 93-95mol%, and the content of nano-yttria accounts for 5-7mol%. Mix 1.0kg of alumina powder with a particle size of 15-30nm, 0.3kg of hexagonal boron nitride powder with a particle size of 0.5-2um, and 0.6kg of polyphenylene with a particle size of 20-38um. Take 0.3 kg of dextrin, add it to the raw material powder and mix thoroughly, then add 7.5 kg of distilled water, and stir to form a uniformly dispersed and suspended slurry for use.

[0034]Use a centrifugal atomizing nozzle to atomize the slurry into fine droplets and spray them into the spray granulation tower. The gas pressure is controlled at 0.8MPa, and the...

Embodiment 3

[0040] Take 6.8 kg of nano-scale yttrium oxide partially stabilized zirconia Y-PSZ with a particle size of 20-60 nm, the content of nano-zirconia accounts for 93-95 mol%, the content of nano-yttrium oxide accounts for 5-7 mol%, and the particle size is 0.5-5 μm Grade yttria partially stabilized zirconia Y-PSZ1.5kg, the content of micron zirconia accounts for 93-95mol%, and the content of nano-yttria accounts for 5-7mol%. Mix 0.8 kg of alumina powder with a particle size of 15-30 nm, 0.1 kg of hexagonal boron nitride powder with a particle size of 0.5-2 um, and 0.8 kg of polyphenylene with a particle size of 20-38 um. Take 0.4 kg of dextrin, add it to the raw material powder and mix thoroughly, then add 8.0 kg of distilled water, and stir to form a uniformly dispersed and suspended slurry for use.

[0041] Use a centrifugal atomizing nozzle to atomize the slurry into fine droplets and spray them into the spray granulation tower. The gas pressure is controlled at 0.8MPa, and the...

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Abstract

The invention relates to a composite micro-nanometer zirconia-based high temperature abradable sealed coating material and a preparation method thereof, and the material is made by compositing a base-phase component A, a base-phase component B, a bonding component, a solid lubrication component and a poring component, wherein the content of each component, based on weight percentage, are as following: 60-70 wt% of base-phase component A, 15-20 wt% of base-phase component B, 5-15 wt% of bonding component, 1-3 wt% of solid lubrication component and 5-8 wt% of poring component; the coating material is obtained through fixing, spraying granulation and screening the components. The coating prepared by the invention has high deposition efficiency, strong high-temperature thermal stability, appropriate coating thickness and hardness, good abrasivity and bonding strength etc.

Description

technical field [0001] The invention relates to an abradable sealing coating material, in particular to a composite micro-nano zirconia-based high temperature abradable sealing coating material which can be used for plasma spraying and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the aerospace industry, higher requirements have been placed on the performance of turbine engines. The working temperature of the turbine casing has reached 1000-1350°C, and the coating is required to have better thermal shock resistance, erosion resistance, abrasion resistance and high temperature stability. At present, the commonly used sealing coatings such as AlSi-graphite, Ni-graphite, NiCrAl-bentonite, NiCrAl-hBN, etc. are limited to medium and low temperature applications due to the low melting point of the base phase material, and their use temperature is generally Not exceeding 900°C. Therefore, the study of high-temperature a...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12C09D5/03
Inventor 程旭东方苍松向泓宇柳敏志张朴孟晓明陆伟
Owner WUHAN UNIV OF TECH
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