Nano-particle electromagnetic interference prevention thermal barrier coating and manufacture method thereof

An anti-electromagnetic interference and thermal barrier coating technology, which is applied in coating, metal material coating process, fusion spraying, etc., can solve the problems of difficult to meet the turbine inlet temperature, poor high temperature stability, low oxidation resistance, etc., to achieve Improved thermal insulation performance, good thermal shock performance, and reduced thermal conductivity

Inactive Publication Date: 2015-11-18
MAANSHAN LANKE REMFG TECH
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Problems solved by technology

However, when thermal barrier coatings are applied to increasingly high working temperatures, they will face more harsh working environments. The thermal barrier coatings prepared by the prior art are prone to phase change, low

Method used

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Embodiment Construction

[0014] The nano particle anti-electromagnetic interference thermal barrier coating is characterized in that it is made of the following raw materials in parts by weight: cerium oxide 32, zirconium dioxide 25, yttrium oxide 33, carbon powder 9, nano trioxide Iron 1.2, vinyl acetate resin 9, NiCoCrAlYTa alloy powder 59, N-methylpyrrolidone 3, titanium diboride 15, vanadium iron slag 27, lanthanum nitrate 4.

[0015] The preparation method comprises the following steps:

[0016] (1) Treat nano ferric oxide and NiCoCrAlYTa alloy powder at 680-750°C for 30-50 minutes at high temperature, quickly cool to room temperature, add lanthanum nitrate for ultrasonic grinding for 20-40 minutes, heat to melt, stir for 5-8 hours, vacuum Condensation molding under the atmosphere, grinding into powder to obtain the modified metal bonding layer;

[0017] (2) Put the carbon powder into the ball mill, spray into the molten vinyl chloride resin, N-methylpyrrolidone and mix well, add titanium dibori...

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Abstract

The invention discloses a nano-particle electromagnetic interference prevention thermal barrier coating. Compared with a traditional thermal barrier coating, carbon dust is added; the porosity of a ceramic phase can be improved after high-temperature calcination modification; in a spraying process, part of particles are not melted fully in a plasma jet, so that the deformation degree of the particles is lower during impact on a base, and porous structures in lap joint with one another can be easily formed; and therefore the heat-insulating property of the coating can be obviously improved. Furthermore, according to the nano-particle electromagnetic interference prevention thermal barrier coating disclosed by the invention, by adopting the modification method, Zr<4+> in a zirconium dioxide crystal lattice is replaced by Y<3+> and Ce<4+>, so that oxygen vacancies and a partial stress field are formed; phonon scattering in the crystal lattice is increased; the heat conductivity is obviously lowered; besides, the atomic weight of the solid solution atom Ce is much greater than that of Y, so that the scattering intensity of phonons in the product can be obviously improved, and accordingly the heat conductivity is reduced. The manufacture process disclosed by the invention is simple, and the manufactured coating has an electromagnetic interference prevention property, a fused salt corrosion prevention property and a good thermal shock property.

Description

technical field [0001] The invention relates to the technical field of ceramic material processing, in particular to a nano particle anti-electromagnetic interference thermal barrier coating and a manufacturing method thereof. Background technique [0002] With the development of aviation gas turbines in the direction of high flow ratio, high thrust-to-weight ratio, and high inlet temperature, the working temperature in the combustion chamber has far exceeded the service temperature limit of Ni-based superalloys. The preparation of thermal barrier coatings on the surface of superalloy substrates has a very direct effect on improving the temperature bearing capacity of the substrates, thereby effectively increasing the working temperature of parts and prolonging their service life. [0003] Thermal barrier coating is generally a functional coating that utilizes materials with relatively low thermal conductivity and is coated on the surface of superalloy substrates with approp...

Claims

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Application Information

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IPC IPC(8): C23C4/12C23C4/06C23C4/10
Inventor 陈玉峰陈坦和陈旭东陈明祥
Owner MAANSHAN LANKE REMFG TECH
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