Surface protection method for zirconium hydride

A technology of zirconium hydride and zirconium oxychloride, applied in solid-state chemical plating, metal material coating process, coating and other directions, can solve problems such as unsatisfactory hydrogen blocking effect, achieve low raw material prices, ensure stability, and achieve outstanding results. The effect of thermal shock resistance
CN103484844AActive Publication Date: 2014-01-01INNER MONGOLIA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INNER MONGOLIA UNIV OF TECH
Publication Date
2014-01-01

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Abstract

The invention relates to a method for preparing a hydrogen-permeation resistant coating on the surface of zirconium hydride. The method particularly adopts the technical scheme that an in situ oxidization method for the preparation of a bottom layer is adopted, a sol-gel method is adopted and a nanometer oxide coating is prepared on the bottom layer, and finally an oxide coating with a composite structure is obtained. The method includes the following steps: firstly, the zirconium hydride is subjected to in situ oxidization in an oxidizing gas, so as to prepare a zirconia bottom layer, then the zirconium hydride is placed in a zirconium oxychloride precursor sol, and the sol is solidified and sintered through adopting a segmented heat processing technology. Through the adoption of the method, the prepared composite coating on the surface of the zirconium hydride is tightly combined with a base body, and is proper in thickness, excellent in thermal shock resistance and better in high-temperature oxidation resistance.
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Description

Technical field

[0001] The invention relates to a method for protecting the surface of zirconium hydride, in particular to a method for preparing an anti-hydrogen permeation coating on the surface of zirconium hydride, and belongs to the technical field of material protection. technical background

[0002] Zirconium hydride has high thermal stability, high hydrogen density, low neutron capture cross-section and high thermal conductivity, making it an ideal solid neutron slowing material. However, due to the high working temperature of zirconium hydride, within its working temperature range, the Zr-H reaction equilibrium shifts in the direction of hydrogen precipitation, causing the continuous precipitation of hydrogen, thereby reducing the neutron moderation efficiency of zirconium hydride. Therefore, controlling the hydrogen loss of zirconium hydride under high temperature conditions is an important issue that needs to be solved in the successful introduction of zirconium hydrid...

Claims

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