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Preparation method for CrN coating on surface of nuclear zirconium alloy and product

A technology of zirconium alloy and coating, which is applied in the field of preparation technology of high-thickness CrN coating, can solve the problems of poor bonding force between coating and zirconium alloy, poor corrosion resistance, etc. The effect of bombardment

Active Publication Date: 2019-06-07
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the technical problems such as high temperature resistance, poor corrosion resistance and poor bonding between the coating and the zirconium alloy existing in fault-tolerant zirconium alloy coating materials for nuclear use, the purpose of the present invention is to provide a CrN coating on the surface of zirconium alloy for nuclear use. The preparation method and product of the coating, the CrN coating with uniform density, excellent bonding force, high thickness and good high temperature corrosion resistance is prepared on the surface of the zirconium alloy

Method used

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  • Preparation method for CrN coating on surface of nuclear zirconium alloy and product
  • Preparation method for CrN coating on surface of nuclear zirconium alloy and product
  • Preparation method for CrN coating on surface of nuclear zirconium alloy and product

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Embodiment 1

[0030] In this embodiment, the CrN coating deposited on the surface of the Zr-4 alloy substrate adopts ultra-high vacuum multi-target co-sputtering technology. 2 The purity is 99.999%, and the specific preparation process includes the following steps:

[0031] (1) Base material pretreatment

[0032] Process the Zr-4 alloy into a square piece with a side length of 1cm and a thickness of 3mm, and use 240 mesh, 600 mesh, 1000 mesh, 1500 mesh, and 3000 mesh water abrasive paper to polish the Zr-4 alloy substrate in turn from coarse to fine, and then use The polishing paste was polished on a metallographic polishing machine. After polishing, it was ultrasonically cleaned with acetone and absolute ethanol for 10 minutes, and dried for use.

[0033] (2) Reverse sputtering cleaning of substrate materials

[0034] Place the pretreated substrate material on the sample stage in the vacuum furnace cavity of the magnetron sputtering equipment, and vacuum the vacuum furnace cavity to 2×10...

Embodiment 2

[0042] In this embodiment, the CrN coating deposited on the surface of the Zr-4 alloy substrate adopts ultra-high vacuum multi-target co-sputtering technology. 2 The purity is 99.999%, and the specific preparation process includes the following steps:

[0043] (1) Base material pretreatment

[0044] Process the Zr-4 alloy into a square piece with a side length of 1cm and a thickness of 3mm, and use 240 mesh, 600 mesh, 1000 mesh, 1500 mesh, and 3000 mesh water abrasive paper to polish the Zr-4 alloy substrate in turn from coarse to fine, and then use The polishing paste was polished on a metallographic polishing machine. After polishing, it was ultrasonically cleaned with acetone and absolute ethanol for 15 minutes, and dried for use.

[0045] (2) Reverse sputtering cleaning of substrate material

[0046] Place the pretreated substrate material on the sample stage in the vacuum furnace cavity of the magnetron sputtering equipment, and vacuum the vacuum furnace cavity to 1×10 ...

Embodiment 3

[0054] In this embodiment, the CrN coating deposited on the surface of the Zr-4 alloy substrate adopts ultra-high vacuum multi-target co-sputtering technology. 2 The purity is 99.999%, and the specific preparation process includes the following steps:

[0055] (1) Base material pretreatment

[0056] Process the Zr-4 alloy into a square piece with a side length of 1cm and a thickness of 3mm, and use 240 mesh, 600 mesh, 1000 mesh, 1500 mesh, and 3000 mesh water abrasive paper to polish the Zr-4 alloy substrate in turn from coarse to fine, and then use The polishing paste was polished on a metallographic polishing machine. After polishing, it was ultrasonically cleaned with acetone and absolute ethanol for 20 minutes, and dried for use.

[0057] (2) Reverse sputtering cleaning of substrate material

[0058] Place the pretreated substrate material on the sample stage in the vacuum furnace cavity of the magnetron sputtering equipment, and vacuum the vacuum furnace cavity to 2×10 ...

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Abstract

The invention discloses a preparation method for a CrN coating on a surface of a nuclear zirconium alloy and a product. The sputtering power, the matrix temperature and the bias voltage are adjusted by the multi-target magnetron sputtering technology; and the CrN coating is prepared on the surface of the Zr alloy matrix. According to the invention, the energy of deposited particles is increased byadjusting the bias voltage of the matrix, so the bombardment effect of the deposited particles on the surface of the Zr alloy matrix is enhanced, the bonding at the interface between the CrN coatingand the Zr alloy matrix is promoted, and then the bonding force of the CrN coating and the Zr alloy matrix is increased; the CrN coating with uniform compactness, excellent bonding performance and high thickness and deposited on the surface of the Zr alloy matrix is obtained; the CrN coating is of important scientific significance and engineering application value to a protective coating preparedon the surface of the zirconium alloy and meeting the engineering application thickness (above 10 microns).

Description

technical field [0001] The invention belongs to the technical field of metal surface modification, and relates to a nuclear zirconium alloy surface modification technology, in particular to a preparation process for preparing a CrN coating with strong binding force and high thickness on the surface of the zirconium alloy. Background technique [0002] In the past few decades, zirconium alloy cladding has shown good radiation resistance and corrosion resistance, and has been successfully used in light water reactors (LWR). ) and beyond the design basis accident (BDBA) conditions, the high temperature oxidation of the zirconium alloy cladding will release a large amount of hydrogen and heat, causing a serious nuclear accident, leading to the leakage of a large amount of radioactive materials, and bringing catastrophic consequences to the human living environment, such as the 2011 "Fukushima Nuclear Power Plant Accident". How to further improve the fault tolerance of cladding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/06G21F1/12
Inventor 刘春海陈青松龙剑平汪建何林芯赵莎曾王镒蔡宋刚
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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