Double-component gradient hydrogen permeation barrier coating and preparation method thereof

A composition gradient, two-component technology, applied in the coating, metal material coating process, ion implantation plating, etc., can solve the problems of mechanical failure, reduction of coating hydrogen penetration resistance, weak interface damage, etc., and achieve residual stress Small size, good resistance to hydrogen permeation, and excellent thermal shock resistance

Inactive Publication Date: 2015-04-29
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the failure to achieve simultaneous strengthening of the double interface, the weaker interface is prone to premature failure, resulting in Al 2 o 3 The mechanical failure of the coating / steel matrix system will eventually lead to a significant reduction in the hydrogen permeation resistance of the coating

Method used

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  • Double-component gradient hydrogen permeation barrier coating and preparation method thereof
  • Double-component gradient hydrogen permeation barrier coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A QX-500 commercial magnetron sputtering coating machine was used to prepare a two-component gradient (Cr, Al)O hydrogen permeable coating on the surface of 304 stainless steel substrates, including the following process steps:

[0030] Step (1), polishing and cleaning the surface of the steel substrate

[0031] The 304-type steel substrate is polished with 100 mesh to 2000 mesh water sandpaper and polishing flannelette in turn, and polished with a diamond polishing agent with a particle size of 3 μm, so that the surface of the steel substrate has a mirror effect. Then use degreasing agent to clean, pickle, deionize, rinse, and dry. The degreasing agent formula is composed of sodium carbonate 160g / L, sodium citrate 45g / L, active agent 5g / L, and sodium phosphate 50g / L; The steel substrate is placed in the vacuum chamber of the magnetron sputtering coating machine for plasma bias backsputter cleaning. The process parameters are: the background vacuum is 5×10 -4 pa, the b...

Embodiment 2

[0052] In this embodiment, a QX-500 type commercial magnetron sputtering coating machine is used to prepare a two-component gradient (Cr, Al)O hydrogen permeable coating on the surface of a 316 stainless steel substrate. Compared with Example 1, there are differences in the following process conditions:

[0053] The difference from step (2) in Example 1 is that the thickness of the Cr coating is 50nm.

[0054] Different from step (3) in Example 1, the vacuum chamber is gradually filled with O 2 The increasing rate of the gas is 10 sccm / min, and the thickness of the obtained Cr-O composition gradient coating is 20 nm.

[0055] Except for the above, other process parameters are the same. Adopt the same coating performance testing method as in Example 1. The results show that the interfacial adhesion between the two-component gradient (Cr, Al)O hydrogen-resistant permeable coating formed in this example and the No. 316 steel substrate is 35N; the residual compressive stress of...

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Abstract

The invention relates to a metal surface treatment coating and a preparation method thereof, in particular to a double-component gradient hydrogen permeation barrier coating and a preparation method thereof. The preparation method comprises the steps of polishing the surface of a steel substrate and cleaning the steel substrate, as well as preparing a Cr coating, preparing a Cr-O component gradient coating, preparing a Cr-Al-O component gradient coating, preparing an Al-O component gradient coating, preparing an Al2O3 coating and annealing the coating. The double-component gradient hydrogen permeation barrier coating is a double-component gradient (Cr, Al) O hydrogen permeation barrier coating, an increased component gradient sub-layer plays the role of a transition layer, and two interfaces between the transition layer and the coating and between the transition layer and steel are enhanced, so the bonding performance of the Al2O3 coating and the gradient coating is more excellent; and due to continuous change of components of the coating in double-component gradient design, the residual stress of the coating is relatively low, the thermal shock performance of the coating is quite excellent, mechanical failure is avoided, and the hydrogen permeation barrier performance of the coating is better.

Description

technical field [0001] The invention relates to a metal surface treatment coating and a preparation method thereof, in particular to a two-component gradient hydrogen permeation resistance coating and a preparation method thereof. Background technique [0002] With the rapid development of global economy and population, energy crisis and environmental pollution have become two major problems facing the world today. The development and utilization of nuclear energy has thus become one of the main ways to solve the above problems. Since the establishment of the International Thermonuclear Fusion Energy Test Reactor (ITER) project, the development and research of fusion energy has become the focus of the scientific and engineering circles. The issue of fusion reactor materials is one of the key engineering issues for the commercialization of fusion energy, especially the hydrogen permeation-resistant coating in the fusion reactor experimental cladding module TBM is currently a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/02C23C14/16C23C14/08C23C14/06C23C14/34
Inventor 杨吉军朱海琳万强廖家莉杨远友刘宁
Owner SICHUAN UNIV
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