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A kind of high bonding strength aluminum oxide resistance to hydrogen permeation and corrosion resistance insulation layer and its preparation method and application

A technology of bonding strength and corrosion resistance, which is applied in the field of hydrogen-resistant materials, can solve problems such as poor bonding strength and mismatching thermal expansion coefficients, and achieve high bonding strength, high compactness, and self-repairing bonding strength

Active Publication Date: 2021-03-02
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the main component in steel is iron, the thermal expansion coefficient of the chromium-aluminum alloy layer does not match the base material steel, so the bonding strength is not very good.

Method used

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  • A kind of high bonding strength aluminum oxide resistance to hydrogen permeation and corrosion resistance insulation layer and its preparation method and application

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Effect test

Embodiment 1

[0023] Preparation of α-Al for Fusion Reactor Cladding Structure Material with a Thickness of 100 μm 2 o 3 Hydrogen permeation resistance corrosion resistant insulating layer:

[0024] (1) Polish the surface of the cladding structure material to a roughness of 1 μm;

[0025] (2) Spray a layer of iron-chromium-aluminum layer on the surface of fusion reactor cladding structure material at room temperature by cold spraying method; the specific process parameters are: spraying temperature is 100°C, spraying powder is FeCr 20 Al 5 Mixed metal powder, the thickness of FeCrAl layer is about 100μm;

[0026] (3) Preparation of α-Al by thermal oxidation of alloy coated samples by in-situ thermal oxidation method 2 o 3 Hydrogen-resistant permeable layer; the specific process parameters are: oxidation temperature is 800°C, oxidation atmosphere is atmospheric oxidation, oxidation time is 8h, α-Al 2 o 3 The thickness of the hydrogen barrier coating is about 120nm.

[0027] (4) Final...

Embodiment 2

[0030] Preparation of α-Al for Fusion Reactor Cladding Structure Material with a Thickness of 10 μm 2 o 3 Hydrogen permeation resistance corrosion resistant insulating layer:

[0031] (1) Polish the surface of the cladding structure material to a roughness of 0.5 μm;

[0032] (2) A layer of FeCrAl layer is sputtered with three targets by magnetron sputtering; the specific process parameters are: the vacuum degree of the sputtering vacuum chamber is controlled at 10 -4 Pa range, and select iron, chromium and aluminum targets with a purity of 99.99%, and obtain 10μm thick FeCr by controlling the sputtering time of each target 15 Al 7 Mixed metal layer.

[0033] (3) Preparation of α-Al by thermal oxidation of alloy coated samples by in-situ thermal oxidation method 2 o 3 Hydrogen-resistant permeable layer; the specific process parameters are: oxidation temperature is 800°C, oxidation atmosphere is atmospheric oxidation, oxidation time is 8h, α-Al 2 o 3 The thickness of th...

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Abstract

The invention relates to a high-binding-strength aluminum oxide resistance to hydrogen permeation and corrosion-resistant insulating layer and a preparation method and application thereof. The coating can be prepared by cold spraying, chemical vapor deposition, magnetron sputtering, thermal spraying and other methods on the surface of the substrate to prepare a layer of iron-chromium-aluminum alloy mixed in a certain proportion, and then obtain a thickness of 0.05-1μm by thermal oxidation. α‑Al is dense and has good bonding strength with the substrate, and has excellent hydrogen permeation resistance effect 2 o 3 Oxide layer, the temperature of the substrate during all operations can be controlled below 800°C. In addition to excellent hydrogen permeation resistance, strong self-healing ability and corrosion resistance and insulation ability, the hydrogen permeable layer provided by the present invention has the biggest outstanding advantage of excellent bonding strength with the substrate. The hydrogen-resistant coating can be used as a hydrogen-permeable barrier layer for stainless steel structural parts, especially for a hydrogen-permeable barrier layer on the surface of fusion reactor inner cladding components.

Description

technical field [0001] The invention relates to the field of hydrogen-resistance materials, in particular to a high-bonding-strength alumina resistance to hydrogen penetration and corrosion-resistant insulation layer and its preparation method and application. Background technique [0002] With the rapid development of today's society, the demand for energy is increasing, and energy issues are the focus of current society. Due to its clean and safe characteristics, nuclear fusion energy has been paid more and more attention by scientists, and nuclear fusion energy has been vigorously developed. The fuel for the fusion reaction is hydrogen isotopes deuterium (D) and tritium (T). The content of T in nature is very small, almost none. Most of the T in the world now is produced through fission reactor reactions, so the price of T is very high (T produced by CANDU fission reactor, about 30,000 US dollars / g). The use of T not only needs to consider the economical issues brought...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08C23C14/35C23C14/16C23C14/58C23C8/12C23C28/00
CPCC23C8/12C23C14/165C23C14/352C23C14/5853C23C24/087C23C28/321C23C28/345
Inventor 徐玉平吕一鸣周海山罗广南
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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