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A kind of high temperature and anti-ablation composite coating and preparation method thereof

A composite coating, anti-ablation technology, applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problem of unfavorable ZrC coating anti-ablation performance, chemical incompatibility, poor quality of composite coating and other problems, to achieve the effect of controllable coating thickness, low cost and low porosity

Active Publication Date: 2020-08-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 Belonging to oxide ceramics, there is a problem of chemical incompatibility with ZrC in the process of powder making and spraying, which will cause poor quality of composite coatings and is not conducive to improving the ablation resistance of ZrC coatings

Method used

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  • A kind of high temperature and anti-ablation composite coating and preparation method thereof
  • A kind of high temperature and anti-ablation composite coating and preparation method thereof
  • A kind of high temperature and anti-ablation composite coating and preparation method thereof

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preparation example Construction

[0048]Preparation of ZrC-TiC composite powder. ZrC powder and TiC powder are mixed according to a certain volume ratio to obtain ZrC-TiC composite powder. Wherein, the content of TiC is 5~40vol.%, preferably 10~30vol.%. When the content of TiC is 10~30vol.%, the obtained ZrC-TiC composite coating has low mass loss rate and good ablation resistance The advantages. The way of mixing can be planetary ball mill. In the case of using a planetary ball mill, the mixing process includes, for example: using absolute ethanol as the medium to mix by ball milling. The mixing time can be 2 to 5 hours, and the uniformly mixed powder can be mixed at a temperature range of 80 to 120 ° C. Dry for 5-30 hours to obtain raw material composite powder. The purity of the ZrC powder used is ≥98.0%, and the particle size range of the powder is 5-90 μm; the purity of the TiC powder is ≥98.0%, and the particle size range of the powder is 5-90 μm. The selection of high-purity powder can ensure the coa...

Embodiment 1

[0059] A high-temperature-resistant and anti-ablation composite coating, the coating is composed of 80vol.% ZrC main phase and 20vol.% TiC second phase, wherein the ZrC powder particle size ranges from 10 to 80 μm, and the purity is 99.0wt.%. ; The particle size range of the TiC powder is 10-90 μm, and the purity is 99.0wt.%. Prepare above-mentioned composite coating and carry out according to the following steps:

[0060] (1) Taking the C / C composite material with SiC transition layer as the matrix, the surface of the matrix was sandblasted, the sandblasting pressure was 0.2MPa, and absolute ethanol was used as the medium, and ultrasonic cleaning was performed twice for 10 minutes each time. Dry in an oven at 100°C for 2 hours and set aside;

[0061] (2) The ZrC and TiC powders are mixed according to the volume ratio of 80:20, using absolute ethanol as the medium for ball milling for 5 hours, and dried at 100° C. for 2 hours to obtain raw material powders for later use;

[...

Embodiment 2

[0069] A high-temperature-resistant and anti-ablation composite coating, the coating is composed of 70vol.% ZrC main phase and 30vol.% TiC second phase, wherein the ZrC powder particle size ranges from 10 to 80 μm, and the purity is 99.0wt.%. ; The particle size range of the TiC powder is 10-90 μm, and the purity is 99.0wt.%. Prepare above-mentioned composite coating and carry out according to the following steps:

[0070] (1) Taking the C / C composite material with SiC transition layer as the matrix, the surface of the matrix was sandblasted, the sandblasting pressure was 0.2MPa, and absolute ethanol was used as the medium, and ultrasonic cleaning was performed twice for 10 minutes each time. Dry in an oven at 100°C for 2 hours and set aside;

[0071] (2) ZrC and TiC powders are mixed according to the volume ratio of 70:30, using absolute ethanol as the medium for ball milling for 5 hours, and dried at 100° C. for 2 hours to obtain raw material powders for later use;

[0072...

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Abstract

The invention provides a high-temperature-resistance and anti-ablation composite coating and a preparation method thereof. The composition of the high-temperature-resistance and anti-ablation composite coating comprises ZrC primary phase and TiC second phase, and the content of the TiC second phase is 5-40 vol.%, preferably 10-30 vol.%.

Description

technical field [0001] The invention relates to a high-temperature-resistant and anti-ablation composite coating and a preparation method thereof, belonging to the field of high-temperature protective coatings. Background technique [0002] ZrC has a low density (6.73g / cm 3 ), high melting point (3420°C), high hardness (Vickers hardness is 25.5GPa), high thermal conductivity (20.5W / m·°C), high chemical stability and wide source of raw materials, etc. High-temperature structural materials with wide application prospects. At present, the relevant preparation methods of ZrC coatings and ZrC-based composite coatings reported in the literature mainly include: chemical vapor deposition method, embedding method and plasma spraying method. Xiong Xiang et al prepared ZrC coatings on the surface of C / C composites by chemical vapor deposition method, and after 240s of oxygen-acetylene flame (flame temperature 3000°C) examination, ZrO 2 The peeling phenomenon of the oxide layer is du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/137C23C4/10
CPCC23C4/10C23C4/134C23C4/137
Inventor 牛亚然刘涛潘孝辉李崇石旻昊郑学斌丁传贤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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