Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of thick CrN coating on surface of cladding material

A cladding material and coating technology, applied in the direction of metal material coating process, coating, reactor fuel elements, etc., can solve the problem of low fault tolerance capacity of accidents, achieve the effect of improving fault tolerance capacity of accidents and improving mechanical properties

Inactive Publication Date: 2019-07-05
DALIAN UNIV OF TECH +1
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a thick coating of CrN on the surface of cladding materials, so as to solve the problem of low accident tolerance of cladding materials made of zirconium alloys

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of thick CrN coating on surface of cladding material
  • Preparation method of thick CrN coating on surface of cladding material
  • Preparation method of thick CrN coating on surface of cladding material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] figure 1 It is a flow chart of the preparation method of the CrN thick coating on the surface of the cladding material provided by the present invention. see figure 1 , the preparation method of cladding material surface CrN (chromium nitride) thick coating provided by the invention comprises:

[0043] Step 101: Prepare cladding material to be plated.

[0044]In the present invention, the cladding material made of zirconium (Zr) alloy is used as the substrate or workpiece, and the cladding material includes Zr-2, Zr-4, Zr-5, M5, ZIRLO, N18, N36, E635 and other nuclear zirconium alloys , and the improved and optimized nuclear zirconium alloy. Use multi-arc ion plating technology or other technologies based on multi-arc ion plating to prepare an accident-resistant, unsaturated thick CrN coating as a protective coating on the surface of the cladding material zirconium alloy by PVD method.

[0045] Step 102: Perform pretreatment on the cladding material to form a pretre...

Embodiment 1

[0073] Base material: Zr-4 zirconium alloy

[0074] The preparation method comprises the following steps:

[0075] (1) Pretreatment: Clean the surface of the cladding material, pipe fittings or workpiece, remove dust, oil, grease, and after drying, install the clamp, keep the distance between the target and the base at 180mm, and vacuumize to 3.0×10 -3 Pa, the deposition temperature is at 420°C.

[0076] (2) Electron gun cleaning: Use a hollow cathode electron gun to clean the pretreated cladding material workpiece again, fill the electron gun with an atmosphere of 1.0-3.0 PaAr, excite argon ions, increase the bias voltage on the workpiece, and activate the surface of the substrate for 5 minutes.

[0077] (3) Generate transition layer: adjust the Ar pressure to 0.3Pa, ignite the Cr arc source, sputter and clean the Cr target under the action of a high bias voltage of -750V, arc current 120A, duty cycle 80%, deposit Cr as the transition layer, and deposit Time 200S.

[0078]...

Embodiment 2

[0081] Base material: M5 zirconium alloy

[0082] The preparation method comprises the following steps:

[0083] (1) Pre-treatment: Clean the surface of the cladding material, pipe fittings or workpiece, remove dust, oil, grease, and after drying, install the clamp, keep the distance between the target and the base at 220mm, and vacuumize to 4.0×10 -3 Pa, the deposition temperature is 350°C.

[0084] (2) Electron gun cleaning: Use a hollow cathode electron gun to clean the pretreated workpiece again, fill the electron gun with an atmosphere of 1.0-3.0 PaAr, excite argon ions, increase the bias voltage on the workpiece, and activate the surface of the substrate for 5 minutes.

[0085] (3) Generate transition layer: adjust the Ar pressure to 0.3Pa, ignite the Cr arc source, sputter and clean the Cr target under the action of a high bias voltage of -750V, arc current 120A, duty cycle 80%, deposit Cr as the transition layer, and deposit Time 200S.

[0086] (4) Deposition gradie...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a thick CrN coating on the surface of a cladding material. A multi-arc ion plating technology is adopted, the zirconium alloy cladding material serves as a matrix, a high-purity Cr target serves as a cathode arc source, high-purity nitrogen serves as reactive gas, by adjusting the technological conditions such as the bias, the temperature, the arc current and the deposition time, a deposition process of depositing a single CrN layer, a CrN gradient layer, a Cr and CrN layer or a Cr / CrN circulating layer is selected, the unsaturated thick CrN<x> uniform coating with excellent binding force is obtained in a short time, the mechanical properties such as high-temperature oxidation resistance, abrasion resistance and corrosion resistance of the coating can be significantly improved under the situation of not affecting the properties of the matrix, thus protection is provided for the cladding material to resist the harsher working environment when a nuclear accident occurs suddenly, the response time is provided for workers to repair a system in a reactor in time, and the accident fault-tolerant capability of the cladding material made of azirconium alloy is greatly improved.

Description

technical field [0001] The invention relates to the technical field of nuclear power material protection and physical vapor deposition coating, in particular to a method for preparing a CrN thick coating on the surface of a cladding material. Background technique [0002] At present, the cladding materials used in nuclear power are subjected to extremely harsh working conditions: the interior is subject to fission products, the exterior is subject to coolant corrosion, temperature, and pressure, and is subject to strong neutron radiation and coolant erosion, vibration, and internal stress. Effects of thermal cycle (on and off) stress and fuel swelling. Zirconium alloy has small thermal neutron absorption cross section, high thermal conductivity, good mechanical properties, good processing performance and good compatibility with uranium dioxide, especially good corrosion resistance to high temperature water and water vapor With the characteristics of high temperature and the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/02C23C14/16C22C16/00G21C3/07
CPCC22C16/00C23C14/022C23C14/0641C23C14/16C23C14/325G21C3/07Y02E30/30
Inventor 胡小刚董闯吴爱民陈宝清谷伟陈大民
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com