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Particulate matter for thermal barrier coating, preparation method of particulate matter, thermal barrier coating and engine

A thermal barrier coating and particle technology, applied in the coating, metal material coating process, application and other directions, can solve the problem of few reports on the structure design of high temperature resistant thermal insulation layer, avoid the phenomenon of high temperature sintering closure, improve the resistance High temperature thermal cycle performance, good effect of high temperature thermal cycle performance

Active Publication Date: 2022-01-14
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the design of high temperature resistant ceramic material system emerges in an endless stream, but there are few reports on the structural design of high temperature resistant heat insulation layer

Method used

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  • Particulate matter for thermal barrier coating, preparation method of particulate matter, thermal barrier coating and engine
  • Particulate matter for thermal barrier coating, preparation method of particulate matter, thermal barrier coating and engine
  • Particulate matter for thermal barrier coating, preparation method of particulate matter, thermal barrier coating and engine

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preparation example Construction

[0061] The application provides a method for preparing the particulate matter for thermal barrier coatings, comprising:

[0062] The granules for thermal barrier coating are obtained by agglomerating and granulating the raw materials and inducing plasma spheroidization.

[0063] After agglomeration granulation and induction plasma spheroidization, particles with a loose inner shell and a dense core-shell structure are obtained, in which the internal pores are randomly distributed and have no specific orientation, which ensures that the pore structure in the subsequently prepared coating is also randomly distributed and free. The characteristics of specific orientation make the coating structure isotropic, the properties are more uniform, and the coating cracking caused by stress concentration is reduced.

[0064] In an optional embodiment, the agglomeration and granulation include:

[0065] Mixing the powder of the raw material on a submicron scale with an organic glue to obt...

Embodiment 1

[0091] This embodiment provides a particle for thermal barrier coating, and its specific preparation method is as follows:

[0092] Using gadolinium zirconate as a raw material, the above particles are prepared through two steps of agglomeration granulation and induction plasma spheroidization.

[0093] Among them, agglomeration granulation is to mix submicron-scale fine powder with organic glue (PVA, the mass is 10% of the powder mass) to obtain agglomerated powder by spray drying. The agglomerated powder has a loose and porous internal structure. The average size of microparticles in the agglomerated powder is 0.1 μm, the average size of micropores is 5 μm, and the powder particle size ranges from 10 to 100 μm. Induction plasma spheroidization is to send the agglomerated powder into the high-enthalpy induction plasma formed by radio frequency induction. After the agglomerated powder is heated by the high-temperature plasma, the surface is melted and then cooled to form a den...

Embodiment 2

[0099] This embodiment provides a particle for thermal barrier coating, and its specific preparation method is as follows:

[0100] Using yttria-stabilized zirconia as a raw material, the above particles are prepared through two steps of agglomeration granulation and induction plasma spheroidization.

[0101] Among them, agglomeration granulation is to mix submicron-scale fine powder with organic glue to obtain agglomerated powder by spray drying. The agglomerated powder has a loose and porous internal structure. The average size of microparticles in the agglomerated powder is 1 μm, the average size of micropores is 3 μm, and the powder particle size ranges from 10 to 100 μm. Induction plasma spheroidization is to send the agglomerated powder into the high-enthalpy induction plasma formed by radio frequency induction. After the agglomerated powder is heated by the high-temperature plasma, the surface is melted and then cooled to form a dense shell; the induction plasma process...

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Abstract

The invention provides a particulate matter for a thermal barrier coating, a preparation method of the particulate matter, the thermal barrier coating and an engine, belonging to the field of new materials. The particulate matter for the thermal barrier coating comprises a shell and an inner core, wherein the porosity of the surface of the shell is less than or equal to 5%; the inner core is provided with first closed pores having pore diameters of 1-5 [mu]m, first skeleton microparticles are arranged among the first closed pores, and the particle size of the first skeleton microparticles is 0.1-2 [mu]m. The thermal barrier coating is obtained by plasma flame jet deposition of the particulate matter for the thermal barrier coating. The engine includes the thermal barrier coating. The particulate matter for the thermal barrier coating and the thermal barrier coating are good in high temperature resistance and thermal cycle performance.

Description

technical field [0001] The application relates to the field of new materials, in particular to a particle used for a thermal barrier coating and a preparation method thereof, a thermal barrier coating and an engine. Background technique [0002] As the inlet temperature of aero-engine combustors and turbines continues to increase, especially the gas temperature of the most advanced engine design exceeds 1800 °C, the surface temperature of some parts may reach an ultra-high temperature of 1500 °C, which is very important for ceramic thermal insulation coatings. Layers pose new challenges. The development of high-temperature-resistant thermal insulation coatings requires the design of new material systems on the one hand, and the optimization of microstructure on the other. At present, the design of high temperature resistant ceramic material system emerges in an endless stream, but there are few reports on the structural design of high temperature resistant heat insulation l...

Claims

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Application Information

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IPC IPC(8): C04B35/626C04B35/632C04B38/08C04B35/48C23C4/11C23C4/134
CPCC04B35/632C04B35/62665C04B35/62695C04B38/085C04B35/62222C04B35/48C23C4/134C23C4/11C04B2235/5436C04B2235/5409C04B2235/5472C04B2235/3246C04B38/0074C04B38/0054
Inventor 张鑫原慷彭浩然卢晓亮颜正庞小肖贾芳
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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