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A preparation method of in-situ vertically grown graphene anti-corrosion layer on the surface of zirconium alloy

A technology of vertical growth and zirconium alloy, applied in metal material coating process, coating, gaseous chemical plating, etc., can solve the problems of poor water side corrosion resistance, short service life of fuel cladding, etc., and achieve good thermal conductivity, Effect of extended service life and low thermal neutron absorption cross section

Active Publication Date: 2018-03-16
HARBIN INST OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims to solve the problems of poor water side corrosion resistance and short service life of the fuel cladding in the existing zirconium alloy cladding, and provides a method for preparing a zirconium alloy surface vertically growing graphene anticorrosion layer in situ

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  • A preparation method of in-situ vertically grown graphene anti-corrosion layer on the surface of zirconium alloy

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specific Embodiment approach 1

[0015] Specific embodiment one: the preparation method of the in-situ vertically grown graphene anti-corrosion layer on the surface of a zirconium alloy described in this embodiment is specifically carried out according to the following steps:

[0016] 1. Place the zirconium alloy in a plasma-enhanced chemical vapor deposition vacuum device, evacuate to a pressure of 5 Pa, feed argon and hydrogen, adjust the gas flow rate of argon to 20 sccm, adjust the gas flow rate of hydrogen to 20 sccm, adjust the pumping The vacuum speed controls the pressure in the plasma-enhanced chemical vapor deposition vacuum device to 100Pa, and then raises the temperature to 300°C to 1000°C under the pressure of 100Pa. After the temperature rises, turn on the RF power supply and adjust the RF power to 150W. Surface treatment is carried out under the conditions of radio frequency power of 150W, pressure of 100Pa and temperature of 300℃~1000℃, and the surface treatment time is 30min;

[0017] 2. Afte...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the zirconium alloy described in step 1 is nuclear industry-grade M5, Zr-2 or Zr-4 zirconium alloy for nuclear fuel cladding. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, the temperature is raised to 500° C. under the condition of a pressure of 100 Pa. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing an in-situ vertically grown graphene anti-corrosion layer on the surface of a zirconium alloy, and the invention relates to a method for preparing an anti-corrosion layer on the surface of a zirconium alloy. The invention aims to solve the problems of poor water side corrosion resistance and short service life of the fuel cladding in the existing zirconium alloy cladding. Methods: 1. Pretreatment of zirconium alloy surface; 2. In situ growth of vertical graphene on the surface of zirconium alloy by PECVD method. The invention is used for the preparation of the in-situ vertically grown graphene anticorrosion layer on the surface of the zirconium alloy.

Description

technical field [0001] The invention relates to a preparation method of a zirconium alloy surface anticorrosion layer. Background technique [0002] With the increasing energy crisis, nuclear energy, as a clean and efficient energy source, has attracted widespread attention. About 16% of the world's electricity comes from nuclear energy. Among them, light water reactors account for 87% of the world's nuclear power generation and 14% of the world's total power generation. Zirconium alloys are widely used in water reactor fuel cladding and other internal reactor structural parts due to their small thermal neutron absorption cross section, excellent mechanical properties at 350 °C and relatively low cost. In recent years, with the rapid development of nuclear power and the improvement of human safety and economic requirements for reactors, further improving the performance of zirconium alloys under high reactor burnup and prolonging their working life has become an important i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/26C23C16/505
Inventor 郑晓航陈恒宁睿蔡伟
Owner HARBIN INST OF TECH
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