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Steel-based multifunctional ceramic composite coating and preparation method thereof

A ceramic composite and multi-functional technology, applied in the direction of ceramic layered products, coatings, chemical instruments and methods, etc., can solve the problems of large difference in thermal and physical properties, poor bonding performance, etc., to achieve electrical insulation performance, maintain integrity, The effect of prolonging service time

Inactive Publication Date: 2009-11-18
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Studies have shown that when the thickness of the dense silicon carbide coating reaches -2 μm, it has a very high TPRF value (-10000), and the compatibility temperature with lithium lead can reach more than 800 ° C, but its thermophysical properties with alloy steel ( Such as thermal expansion coefficient, etc.) are quite different, resulting in poor bonding performance between the two at high temperatures

Method used

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  • Steel-based multifunctional ceramic composite coating and preparation method thereof

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Embodiment Construction

[0012] In Fig. 1, 1 is the base alloy steel, 2 is the iron-aluminum alloy layer, 3 is the alumina coating, 4 is the silicon dioxide coating, and 5 is the silicon carbide coating.

[0013] Preparation method of steel-based multifunctional ceramic composite coating:

[0014] 1. Using a vacuum plasma spraying process to prepare an iron-aluminum alloy layer 2 with a thickness of 50-150 μm on the surface of the base alloy steel 1 .

[0015] 2. Prepare an aluminum oxide coating 3 with a thickness of 20-100 μm on the iron-aluminum alloy layer by using a vacuum plasma spraying process.

[0016] 3. Prepare a silicon dioxide coating 4 with a thickness of 10-50 μm on the aluminum oxide coating 3 by using a vacuum plasma spraying process.

[0017] 4. Prepare a silicon carbide coating 5 with a thickness of 20-100 μm on the silica glass layer 4 by using a vacuum plasma spraying process.

[0018] 5. The composite coating is densified as a whole by hot isostatic pressing to obtain an alumin...

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Abstract

The invention discloses a steel-based multifunctional ceramic composite coating and a preparation method thereof, comprising an iron and aluminum alloy layer, an alumina coating, a silicon dioxide coating and a silicon carbide coating which are adhered on the surface of alloy steel. The invention provides a method which takes iron and aluminium powder, alumina powder, silicon dioxide (quartz) powder, and silicon carbide powder as raw materials, utilizes the vacuum plasma spraying technology to prepare the composite coating on the surface of the base material of the alloy steel, and finally utilizes the hot isostatic pressing technology to carry out densification treatment to the composite coating so as to ultimately obtain the novel alumina / silicon dioxide / silicon carbide multi-functionalceramic composite coating. The method has concise procedures, is convenient for large-scale production, is not only applicable to fusion reactor with rigorous requirement and other nuclear industry fields, but also applicable to the fields of chemical industry, daily furniture industry, electrical appliance industry, manufacturing industry, boiler and high temperature resistant material and the like.

Description

technical field [0001] The invention belongs to the new technology field of alloy steel surface protection, in particular to a steel-based multifunctional ceramic composite coating and a preparation method thereof. Background technique [0002] In a fusion reactor, the cladding is a key component to realize the self-sustainability of tritium fuel and the application of fusion energy. The tritium multiplied in the cladding may diffuse into the metal in the form of interstitial atoms, and has a high permeability, and it is easy to penetrate the cladding through structural materials. On the one hand, it will cause the leakage and loss of tritium fuel, and on the other hand, the It has a certain degree of radioactivity, which is likely to cause potential radioactive hazards to the staff and surrounding residents. In addition, the corrosion of structural materials by the liquid lithium-lead alloy flowing in the cladding is the main factor that may cause the performance of the cl...

Claims

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Application Information

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IPC IPC(8): B32B15/04B32B18/00C23C4/12C23C4/08C23C4/10C23C4/18C23C4/11C23C4/134
Inventor 郭智慧黄群英吴宜灿宋勇严资林
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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