Method for improving adhesive performance of SiC-C hydrogen (tritium) resistance coatings to matrix metal material
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A substrate and coating technology, applied in the field of nuclear technology and application, to achieve the effect of improving the interface structure and improving the interface bonding performance
Inactive Publication Date: 2009-04-29
SICHUAN UNIV
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However, tritium emitted from spent fuel easily enters the stainless steel substrate and accumulates, causing "hydrogen embrittlement"
Method used
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Embodiment example 1
[0017] 1) The stainless steel material is used as the substrate. After the surface of the substrate is conventionally ground and polished, it is ultrasonically cleaned with acetone and deionized water, dried, and then placed in a vacuum studio.
[0018] 2) The background vacuum reaches 6×10 -4 After Pa, use Ar first + The ion beam sputters and cleans the sample at an angle of 45 degrees, Ar + The ion beam energy is 3-5keV, and the beam current is 5-10mA.
[0019] 3) Deposit a Cu layer with a thickness of 20nm by DC magnetron sputtering, use argon ion bombardment to mix Cu and Fe elements, Ar + The ion energy is 40keV, the dose is 1×10 16 ions / cm 2 .
[0020] 3) A SiC-C coating with a thickness of 40nm is deposited by intermediate frequency magnetron sputtering, the conditions are: beam current 150mA, voltage 500-600V, duty cycle 62.5%, and then the coating is bombarded with an argon ion beam from the vertical direction, and the ion energy is 40keV, bombardment dose 1×10 ...
Embodiment example 2
[0023] 1) The stainless steel material is used as the substrate. After conventional grinding and polishing, ultrasonic cleaning and drying, the surface of the substrate is placed in a vacuum studio.
[0024] 2) The background vacuum reaches 6×10 -4 After Pa, the sample is cleaned by sputtering by electron beam heating and scanning. The energy of the electron beam is 20KeV, and the current density of the electron beam is about 8×10 4 W / cm 2 , scanning speed is 5mm / min
[0025] 3) Deposit a Cu layer with a thickness of 10nm by the method of intermediate frequency magnetron sputtering, and then bombard it with argon ions, the energy of Ar+ ions is 30keV, and the dose is 1×10 16 ions / cm 2 .
[0026] 3) A SiC-C coating with a thickness of 40nm is deposited by intermediate frequency magnetron sputtering, the conditions are: beam current 150mA, voltage 500-600V, duty cycle 80%, and then the coating is bombarded with an argon ion beam from the vertical direction, and the ion energ...
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Abstract
The invention discloses a method for improving the cohesiveness of a SiC-C hydrogen resisting coating to a matrix metal material, which belongs to the field of nuclear technology and application. When the SiC-C hydrogen (tritium) resisting coating is prepared on the matrix metal material, an intermediate transition layer is adopted to improve the cohesiveness of the coating to a matrix and to improve the hydrogen (tritium) resisting effect of the SiC-C coating. The method comprises the following steps: performing low-energy particle bombardment on the matrix of the metal material after the polishing and cleaning so as to further remove the surface contamination and activate the surface; and then using a physical vapor deposition technology to deposit the transition layer to further prepare the SiC-C coating on the basis of the transition layer. The method can be performed in a device for preparing the SiC-C coating, and the preparation of the intermediate transition layer can be directly matched with the preparation of the SiC-C coating. After the deposition of the intermediate transition layer, the SiC-C hydrogen (tritium) resisting coating not only can effectively improve the cohesiveness of the coating and the matrix material, but also is advantageous to improve the hydrogen resistance of the coating itself.
Description
technical field [0001] The invention belongs to the field of nuclear technology and application, and relates to a method for improving the adhesion performance of a SiC-C hydrogen barrier (tritium) coating to a base metal material by depositing an intermediate transition layer. Background technique [0002] Burying nuclear waste in a permanent repository is currently recognized as the safest way to dispose of nuclear waste. The spent fuel after the nuclear reaction is packaged in stainless steel storage tanks. The tritium emitted from the spent fuel easily enters the stainless steel substrate and accumulates, leading to "hydrogen embrittlement". Surface modification of stainless steel materials and deposition of SiC-C hydrogen barrier (tritium) coatings are a method to prevent hydrogen embrittlement. The adhesion performance of SiC-C coating to the substrate is a key factor affecting the life of the coating. [0003] The currently disclosed methods for preparing carbides ...
Claims
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