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Multi-layer interface coating, and preparation method and application thereof

An interface coating and coating technology, applied in the field of multi-layer interface coating and its preparation, can solve the problems of poor anti-oxidation performance, unable to protect materials from water and oxygen environment erosion for a long time, etc., to reduce thermal stress and achieve excellent anti-oxidation. performance, the effect of increasing viscosity

Active Publication Date: 2019-04-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the poor oxidation resistance of the above-mentioned traditional single-layer interfaces (C, BN) and multi-layer interfaces ((C / SiC)n and (BN / SiC)n), the present invention cannot protect materials from water and oxygen for a long time. Environmental erosion and other problems, prepared a kind of (SiBN / SiBN / SiBN) with good physical and chemical compatibility, which can be applied to large ceramic matrix composite components 3 N 4 )n multilayer interface, and correspondingly provides a preparation method with simple preparation process, repeatable operation, uniform composition, material composition thickness and layer number controllable

Method used

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  • Multi-layer interface coating, and preparation method and application thereof
  • Multi-layer interface coating, and preparation method and application thereof
  • Multi-layer interface coating, and preparation method and application thereof

Examples

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Embodiment 1

[0055] A kind of (SiBN / SiBN / Si 3 N 4 )n multilayer coating, SiBN and Si in the multilayer coating 3 N 4 The coating is deposited alternately 4 times, and the thickness of the SiBN coating is greater than that of Si 3 N 4 Coating, the thickness of the coating belongs to the nanometer to micron level in size, in this embodiment, from the inside to the outside, the thickness of the first layer of SiBN coating is 4 μm, the first layer of Si 3 N 4 The thickness of the coating is 780nm, the thickness of the second layer of SiBN coating is 1.3μm, and the thickness of the second layer of Si 3 N 4 The thickness of the coating is 800nm, the thickness of the third layer of SiBN coating is 1.2μm, and the third layer of Si 3 N 4 The thickness of the coating is 740nm, the thickness of the fourth layer of SiBN coating is 1.0μm, and the thickness of the fourth layer of Si 3 N 4 The coating thickness is 740 nm. The method for preparing the composite coating in the above-mentioned em...

Embodiment 2

[0065] A kind of (SiBN / Si 3 N 4 )n multilayer coating, SiBN and Si in the multilayer coating 3 N 4 The coating is deposited alternately 4 times, and the thickness of the SiBN coating is greater than that of Si 3 N 4 Coating, the thickness of the coating belongs to the nanometer level in size. In this embodiment, from the inside to the outside, the thickness of the first layer of SiBN coating is 450nm, and the thickness of the first layer of Si 3 N 4 The thickness of the coating is 150nm, the thickness of the second layer of SiBN coating is 160nm, and the thickness of the second layer of Si 3 N 4 The thickness of the coating is 150nm, the thickness of the third layer of SiBN coating is 170nm, the third layer of Si 3 N 4 The thickness of the coating is 155nm, the thickness of the fourth layer of SiBN coating is 155nm, the fourth layer of Si 3 N 4 The coating thickness was 145 nm. The method for preparing a multilayer coating in the above-mentioned embodiment comprises...

Embodiment 3

[0075] A kind of (SiBN / Si 3 N 4 )n multilayer coating, SiBN and Si in the multilayer coating 3 N 4 The coating is alternately deposited 3 times, and the thickness of the SiBN coating is greater than that of Si 3 N 4 Coating, the thickness of the coating belongs to the nanometer level in size. In this embodiment, from the inside to the outside, the thickness of the first layer of SiBN coating is 652nm, and the thickness of the first layer of Si 3 N 4 The thickness of the coating is 56nm, the thickness of the second layer of SiBN coating is 153nm, and the thickness of the second layer of Si 3 N 4 The thickness of the coating is 66nm, the thickness of the third layer of SiBN coating is 138nm, the third layer of Si 3 N 4 The coating thickness is 64 nm. Refer to Example 1 for the method for preparing a multi-layer coating in the above-mentioned examples.

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Abstract

The invention relates to a multi-layer interface coating, and a preparation method and application thereof. The multi-layer interface coating comprises SiBN coating layers and Si3N4 coating layers which are alternately formed on the surface of a substrate in sequence, wherein the number of layers of the SiBN coating layers is larger than or equal to 1, and is preferably in a range of 2-5.

Description

technical field [0001] The invention relates to a multilayer interface coating, a preparation method and application thereof, and belongs to the field of interface phases of ceramic matrix composite materials. Background technique [0002] Continuous fiber reinforced ceramic matrix composites mainly include three categories: C / C, C / SiC and SiC / SiC, which have low density, chemical corrosion resistance, high specific strength, high specific modulus, and excellent thermal stability. Aviation, aerospace, nuclear energy and other fields are widely used. Compared with the first two types of composite materials, SiC / SiC composite materials have good oxidation resistance compared to carbon fibers due to the use of SiC fibers as the reinforcement phase. The reinforcement phase mainly used in matrix composite materials, taking aero-engines as an example, currently using SiC / SiC composite materials has been used in engine tailpipe seals and regulators, guide vanes, combustion chamber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628C04B35/80
CPCC04B35/62865C04B35/62871C04B35/80
Inventor 廖春景董绍明胡建宝靳喜海张翔宇何平丁玉生
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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