High-temperature-resistant CMAS-corrosion-resistant rare earth silicate ceramic and preparation method thereof

A rare earth silicate and rare earth monosilicate technology, applied in the direction of high-efficiency propulsion technology, sustainable transportation, climate sustainability, etc., can solve the problems of limiting the application of EBCs, unable to meet the use requirements, poor corrosion ability, etc. The effect of improving the corrosion resistance of high temperature CMAS, improving the corrosion resistance of high temperature CMAS, and low cost
CN114853473AActive Publication Date: 2022-08-05SHENYANG POLYTECHNIC UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENYANG POLYTECHNIC UNIV
Publication Date
2022-08-05

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Abstract

The invention relates to high-temperature-resistant CMAS-corrosion-resistant rare earth silicate ceramic and a preparation method thereof. The ceramic is of a composite ceramic structure compounded by high-entropy rare earth monosilicate and high-entropy rare earth disilicate. The preparation method comprises the following steps: respectively synthesizing RE2O3 and SiO2 into single-phase (xRE1 / x) 2SiO5 powder and single-phase (xRE1 / x) 2Si2O7 powder through a solid-phase reaction method, then compounding the single-phase (xRE1 / x) 2SiO5 powder and the single-phase (xRE1 / x) 2Si2O7 powder according to a certain proportion to form (xRE1 / x) 2SiO5 / (xRE1 / x) 2Si2O7 complex-phase powder, tabletting the powder, and carrying out pressureless sintering to form (xRE1 / x) 2SiO5 / (xRE1 / x) 2Si2O7 complex-phase ceramic blocks; the high-entropy rare earth silicate ceramic with the structure has excellent performances such as good high-temperature CMAS corrosion resistance and the like.
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Description

technical field

[0001] The invention belongs to the technical field of preparation of environmental barrier coating materials, and relates to a structure design and preparation method of a multiphase ceramic composited with high-entropy rare-earth monosilicate and high-entropy rare-earth disilicate. Background technique

[0002] SiC ceramic matrix composites (CMCs) are composite materials reinforced with SiC ceramics and C or SiC fibers. SiC-CMCs have the characteristics of low density, high temperature resistance, excellent mechanical properties, and anti-oxidation. When they are applied to aero-engines such as combustion chambers, turbines, etc., they can achieve the effects of structural weight reduction, improved combustion efficiency, and high thrust-to-weight ratio development. Therefore, SiC-CMCs have received extensive attention from researchers.

[0003] In a dry oxidizing atmosphere, SiC-CMCs can form dense and anti-oxidative SiO on the surface 2 The protective l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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