Rare-earth-based T/EBC ceramic matrix composite environmental barrier coating and preparation method thereof
A ceramic matrix composite, environmental barrier technology, applied in the direction of mechanical equipment, machine/engine, blade supporting elements, etc., can solve the problems of low maximum tolerance temperature, insufficient high temperature erosion resistance, etc., to reduce thermal conductivity, Improve the effect of high temperature resistance and compact structure
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Embodiment 1
[0034] This embodiment provides a ceramic-based composite environmental barrier coating, which includes a ceramic substrate and a composite environmental barrier coating. The composite environmental barrier coating sequentially includes a water-oxygen corrosion-resistant layer, a chemical barrier layer, an energy dissipation layer, and The heat protection shielding layer and the water and oxygen corrosion resistant layer are prepared on the surface of the ceramic substrate; the material of the ceramic substrate is silicon carbide fiber reinforced silicon carbide ceramic matrix composite material; the water and oxygen corrosion resistant layer includes a mullite layer with a thickness of 50 μm and a thickness of 70 μm lutetium silicate layer, the material of the mullite layer includes mullite, the material of the lutetium silicate layer includes lutetium silicate; the material of the chemical barrier layer includes zirconium nitride, the thickness is 7 μm, and the porosity is les...
Embodiment 2
[0042] This embodiment provides a ceramic-based composite environmental barrier coating, which includes a ceramic substrate and a composite environmental barrier coating. The composite environmental barrier coating sequentially includes a water-oxygen corrosion-resistant layer, a chemical barrier layer, an energy dissipation layer, and Thermal protection shielding layer; the material of the ceramic substrate is silicon carbide fiber reinforced silicon carbide ceramic matrix composite material, and the water and oxygen corrosion resistant layer is prepared on the surface of the ceramic substrate; the water and oxygen corrosion resistant layer includes a mullite layer with a thickness of 58 μm and a thickness of 65 μm lutetium silicate layer, the material of the mullite layer includes mullite, the material of the lutetium silicate layer includes lutetium silicate; the material of the chemical barrier layer includes zirconium nitride, the thickness is 9 μm, and the porosity is less...
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