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Preparation method and application of Er2O3 coating

An er2o3 coating technology, which is applied in the field of Er2O3 coating preparation, can solve the problems of harsh service environment, cracks and peeling of the coating, and achieve precise and controllable process parameters, green and environmentally friendly preparation process, and convenient equipment operation Effect

Inactive Publication Date: 2020-05-15
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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Problems solved by technology

However, it is worth noting that the cladding tritium-resistant coating used for fusion reactors is used in harsh environments, and the coating needs to withstand high temperatures for a long time, so Er 2 o 3 The binding force of the coating film base has an important influence on its tritium blocking performance. In a word, due to the Er 2 o 3 The thermal expansion coefficient of the coating and the base material is quite different. Under the long-term action of thermal stress, the coating is prone to cracks and even peeling off, which greatly reduces the Er 2 o 3 The binding force between the coating and the substrate, and for the Er in the tritium breeding cladding of the fusion reactor 2 o 3 coating, its tritium barrier performance is greatly reduced

Method used

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  • Preparation method and application of Er2O3 coating
  • Preparation method and application of Er2O3 coating
  • Preparation method and application of Er2O3 coating

Examples

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preparation example Construction

[0036] a kind of Er 2 o 3 The preparation method of coating, this method comprises the following steps:

[0037] (1) Surface nanometerization: the cleaned matrix material is fixed in front of the nozzle of the supersonic particle shot peening equipment and subjected to surface shot peening treatment to obtain a surface nano layer. The supersonic particle shot peening technology is selected for shot peening of the coating substrate. On the one hand, a nanocrystalline layer of a certain thickness can be prepared on the surface of the substrate by controlling the process parameters of the supersonic particle shot peening. After the substrate surface of the present invention is nano-treated, the diffusion speed of Fe and Er elements is accelerated, and the required diffusion activation energy is reduced, thereby greatly reducing the subsequent diffusion annealing temperature and shortening the annealing time. This feature not only eliminates the negative impact of high temperatu...

Embodiment 1

[0061] a kind of Er 2 o 3 The preparation method of the coating is as follows:

[0062] (1) Fix the cleaned 100Cr6 steel sheet before the nozzle of the supersonic particle shot blasting equipment, the distance to be sprayed is 30mm from the nozzle, the carrier gas pressure of the supersonic particle bombardment equipment is 2.5MPa, and the nozzle walking speed is 1mm / s ( Converted to the shot peening area per unit time is 1.5cm 2 / s), the shot peening incident angle is 90°, and the shot peening medium is spherical alumina powder (corundum powder), with a diameter of 60 μm;

[0063] (2) Place the shot-peened steel base material obtained in step (1) in a magnetron sputtering vacuum chamber, and the background vacuum pressure of the vacuum chamber is 8.0×10 -4 pa, RF magnetron sputtering coating was carried out under the condition of sputtering power of 100W, the Er target with a purity of 99.95wt% was used as the sputtering source, Ar was introduced during sputtering, the Ar ...

Embodiment 2

[0071] a kind of Er 2 o 3 The preparation method of the coating is as follows:

[0072] (1) Fix the cleaned 100Cr6 steel sheet before the nozzle of the supersonic particle shot blasting equipment, the distance to be sprayed is 30mm from the nozzle, the carrier gas pressure of the supersonic particle bombardment equipment is 2.5MPa, and the nozzle walking speed is 1mm / s ( Converted to the shot peening area per unit time is 1.5cm 2 / s), the shot peening incident angle is 90°, and the shot peening medium is spherical alumina powder (corundum powder), with a diameter of 60 μm;

[0073] (2) Place the shot-peened steel base material obtained in step (1) in a magnetron sputtering vacuum chamber, and the background vacuum pressure of the vacuum chamber is 8.0×10 -4 pa, under the condition of sputtering power of 100W, carry out radio frequency magnetron sputtering coating, use Er target with a purity of not less than 99.95wt% as the sputtering source, pass Ar into it during sputteri...

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Abstract

The invention provides a preparation method and application of an Er2O3 coating. The preparation method of the Er2O3 coating comprises the following steps that firstly, peening treatment on a substrate is carried out by adopting a supersonic particle peening method; then a pure Er coating is plated and then the Er2O3 coating is plated on the matrix material by using a magnetron sputtering method;and finally annealing treatment is carried out. According to the invention, the problem that the coating is extremely prone to cracks, even spalling and poor bonding force under the long-term action of thermal stress is solved, and the effect of improving the binding force of the Er2O3 coating film is achieved. The coating is prepared by adopting a method of peening, magnetron sputtering and heattreatment, the process is simple and mature, the equipment is convenient to operate, the process parameters are accurate and controllable, and the method is suitable for mass production. The preparation method of the Er2O3 coating can be applied to a fusion reactor tritium proliferation cladding.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to an Er 2 o 3 Coating preparation method. Background technique [0002] As a scarce strategic resource, tritium is widely used in national defense, nuclear energy, medicine, petroleum industry and other fields. Among them, tritium has an important application in thermonuclear fusion reaction. Because tritium is radioactive and highly permeable, it is easy to penetrate into metal structural materials. This will not only cause the loss of tritium, causing radioactive pollution, but also cause embrittlement and swelling of structural materials, which will bring disastrous consequences. Therefore, preventing the penetration and leakage of tritium is a practical problem that cannot be ignored. In particular, the tritium produced in the tritium breeding envelope of the fusion reactor can easily penetrate outward through the cladding structure material. In order to effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/02C23C14/16C23C14/08C23C14/35C23C14/58
CPCC23C14/0036C23C14/028C23C14/08C23C14/165C23C14/35C23C14/5806
Inventor 张海斌陈辰彭述明
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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