High-temperature anti-ablative coating formed on base material as well as preparation method and application of high-temperature anti-ablative coating

A base material and anti-ablation technology, applied in the field of high-temperature thermal protection coating and preparation, can solve the problems of inability to prepare structure, good performance, low porosity, etc., and achieve excellent high-temperature ablation resistance, low porosity, High bonding strength
CN109678560AActive Publication Date: 2019-04-26AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
Publication Date
2019-04-26

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Abstract

The invention relates to a high-temperature anti-ablative coating formed on a base material as well as a preparation method and application of the high-temperature anti-ablative coating. The high-temperature anti-ablative coating comprises a SiC transition layer and a ZrC-SiC-Gd2o3 complex phase oxygen barrier layer formed by mixing ZrC, SiC and Gd2o3, which are sequentially formed on the base material, wherein the molar percentage of Gd2o3 in the ZrC-SiC-Gd2o3 complex phase oxygen barrier layer is 10-20%. The method comprises the steps as follows: preparing the SiC transition layer by using achemical vapor deposition method; and preparing the ZrC-SiC-Gd2o3 complex phase oxygen barrier layer by using a vacuum plasma spraying method. The high-temperature anti-ablative coating disclosed bythe invention has a high temperature self-healing property, so that an oxidizing atmosphere can be prevented from migrating to the interior of a material, the anti-ablative service time of the coatingat a high temperature is prolonged and an effective protection role is played on a ceramic matrix composite; and the high-temperature anti-ablative coating has the advantages of small porosity, highbonding strength, excellent high-temperature anti-ablative performance and the like.
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Description

technical field

[0001] The invention belongs to the technical field of high-temperature thermal protection coating and its preparation, and in particular relates to a high-temperature ablation-resistant coating formed on a base material and a preparation method and application thereof. Background technique

[0002] Hypersonic flight technology is one of the core technologies in the field of aerospace, and it has received more and more attention from major aerospace countries. When the aircraft moves at high speed, the temperature of its leading edge surface, tip, combustion chamber and other parts can reach thousands or even thousands of degrees Celsius. Under these harsh conditions, C alone f / SiC,C f Composite materials such as / C-SiC are difficult to meet the needs of use, and it is necessary to coat the surface of the composite material with a high-temperature anti-ablation coating.

[0003] Ultra-High Temperature Ceramics (UHTCs) still have good stability in harsh en...

Claims

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