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Nuclear reactor fuel cladding nano-composite coating and preparation method thereof

A nuclear reactor fuel, cladding nanotechnology, applied in the direction of reactor fuel elements, reactors, metal material coating processes, etc., can solve the problem of reducing the neutron economy of the cladding, fretting wear, and poor resistance to high temperature water vapor corrosion of zirconium alloys. and other problems to achieve the effect of reducing neutron economic loss, refining grains, and improving neutron economy.

Active Publication Date: 2021-09-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for this kind of N-containing coating, the N content is relatively high, and N has a high thermal neutron absorption cross section, which will greatly reduce the neutron economy during the use of the cladding
At present, the zirconium alloy used for medium pressure water reactor fuel cladding of nuclear reactor has poor corrosion resistance to high temperature water vapor and has problems such as fretting wear and so on.

Method used

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  • Nuclear reactor fuel cladding nano-composite coating and preparation method thereof
  • Nuclear reactor fuel cladding nano-composite coating and preparation method thereof
  • Nuclear reactor fuel cladding nano-composite coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0063] A nanocomposite coating for nuclear reactor fuel cladding, see figure 2 As shown, it includes: a metal layer 1, a first transition layer 2, a second transition layer 3 and a functional layer 4 that are sequentially stacked on the surface of the nuclear fuel cladding;

[0064] The composition of the metal layer 1 is Cr;

[0065] The composition of the first transition layer 2 is CrN, wherein the Cr content in CrN is 64.8 at%, and the N content is 35.2 at%);

[0066] The composition of the second transition layer 3 is CrCN, wherein the Cr content in CrCN is 58 at%, the C content is 16.2 at%, and the N content is 25.8 at%;

[0067] The composition of the functional layer 4 is CrTiSiCN, wherein the Cr content in CrTiSiCN is 27.4 at%, the Ti content is 33.0 at%, the Si content is 5.0 at%, the C content is 22.2 at%, and the N content is 12.4 at%.

[0068] The above-mentioned nuclear reactor fuel cladding nanocomposite coating is prepared according to the following steps: ...

Embodiment 2

[0079] A nanocomposite coating for nuclear reactor fuel cladding, see figure 2 As shown, it includes: a metal layer 1, a first transition layer 2, a second transition layer 3 and a functional layer 4 that are sequentially stacked on the surface of the nuclear fuel cladding;

[0080] The composition of the metal layer 1 is Cr;

[0081] The composition of the first transition layer 2 is CrN, wherein the Cr content in CrN is 64.8 at%, and the N content is 35.2 at%);

[0082] The composition of the second transition layer 3 is CrCN, wherein the Cr content in CrCN is 58 at%, the C content is 16.2 at%, and the N content is 25.8 at%;

[0083] The composition of the functional layer 4 is CrTiSiCN, wherein the Cr content in CrTiSiCN is 33.6 at%, the Ti content is 45.3 at%, the Si content is 2.7 at%, the C content is 9.8 at%, and the N content is 8.6 at%.

[0084] The above-mentioned nuclear reactor fuel cladding nanocomposite coating is prepared according to the following steps:

[0...

Embodiment 3

[0092] It is the same as the embodiment 1, except that the cladding base material selected in this embodiment is a cylindrical zirconium alloy rod with a height of 15 mm and a diameter of 10 mm.

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Abstract

The invention discloses a nuclear reactor fuel cladding nano-composite coating and a preparation method thereof, and relates to the technical field of nano-composite coatings. The nano-composite coating comprises a metal layer, a first transition layer, a second transition layer and a functional layer which are sequentially laminated on the surface of the nuclear fuel cladding; the component of the metal layer is Cr; the component of the first transition layer is CrN; the component of the second transition layer is CrCN; and the component of the functional layer is CrTiSiCN. The coating has good binding force, and by reducing the content of the N element in the coating and introducing the C element, on one hand, the neutron economy of the fuel cladding is improved, on the other hand, a C elementary substance phase with high surface hardness and a low friction coefficient is obtained, and the effects of strong friction reduction, wear resistance and high heat conduction are achieved.

Description

technical field [0001] The invention relates to the technical field of nanocomposite coatings, in particular to a nuclear reactor fuel cladding nanocomposite coating and a preparation method thereof. Background technique [0002] As a kind of green, clean and efficient energy, nuclear energy can not only increase energy supply, optimize energy structure, but also greatly reduce the emission of greenhouse gases and polluting gases. It has become an indispensable and important part of my country's energy composition. The development of nuclear power is the focus of China's energy strategy. The pressurized water reactor uses light water as the coolant and moderator, and the pressurized water reactor core is placed in a cylindrical pressure vessel. The fuel element is clad with a zirconium alloy tube and contains uranium dioxide pellets. Zirconium alloy cladding, as the first barrier to the radioactivity of the reactor core, has a series of advantages such as low neutron absorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/02C23C14/06C23C14/14C23C14/32C23C14/35G21C3/07
CPCC23C14/028C23C14/022C23C14/35C23C14/325C23C14/14C23C14/0641C23C14/0664C23C14/0036G21C3/07Y02E30/30
Inventor 马大衍恽迪李浩刘俊凯杨健乔
Owner XI AN JIAOTONG UNIV
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