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Multilayer structure of SiC/SiC (silicon carbide) composite cladding tube and preparation method thereof

A technology of composite material layer and composite material tube, applied in the multi-layer structure of SiC/SiC composite cladding tube and its preparation field, can solve the problems of low thermal conductivity and insufficient toughness, achieve good toughness and avoid residual Silicon, the effect of avoiding the presence of sintering aids

Active Publication Date: 2015-04-29
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of insufficient strength, toughness and low thermal conductivity in the prior art, the present invention proposes a multi-layer structure of SiC / SiC composite cladding tube and its preparation method

Method used

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  • Multilayer structure of SiC/SiC (silicon carbide) composite cladding tube and preparation method thereof
  • Multilayer structure of SiC/SiC (silicon carbide) composite cladding tube and preparation method thereof
  • Multilayer structure of SiC/SiC (silicon carbide) composite cladding tube and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0053] This embodiment is a multi-layer structure of SiC / SiC composite cladding tube and its preparation method, and the specific design is:

[0054] A three-layer structure of SiC / SiC composite material and its preparation method, comprising

[0055] The inner layer is SiC whisker toughened SiC composite material layer;

[0056] The middle layer is SiC f Toughened SiC composite layer;

[0057] The outer layer is SiC whisker toughened SiC composite material layer;

[0058] The specific preparation method of the three-layer structure of the SiC / SiC composite cladding tube is:

[0059] Step 1: Prepare the inner layer of the SiC whisker toughened SiC composite tube, the specific process is:

[0060] (a1) Using 40% alcohol as a solution, disperse the mixed powder formed by SiC whiskers and SiC particles, and dry it after dispersing; the dispersion is ultrasonic for 30 minutes, and magnetically stirred for 2 hours; the mixed powder The volume ratio of SiC whiskers and SiC part...

Embodiment 2

[0075] This embodiment is a method for preparing a multilayer structure of a SiC / SiC composite cladding tube, and the specific design is:

[0076] A four-layer structure of a SiC / SiC composite cladding tube, comprising

[0077] The innermost layer is SiC whisker toughened SiC composite material layer;

[0078] The second layer is SiC f Toughened SiC composite layer;

[0079] The third layer is SiC whisker toughened SiC composite material layer;

[0080] The outermost layer is SiC f Toughened SiC composite layer;

[0081] The specific preparation method of the four-layer structure of the SiC / SiC composite cladding tube is:

[0082] Step 1: Prepare the inner layer of the SiC whisker toughened SiC composite tube, the specific process is:

[0083] (a1) Using 50% alcohol as a solution, disperse the mixed powder formed by SiC whiskers and SiC particles, and dry after dispersion; the dispersion is ultrasonic for 40 minutes, and magnetically stirred for 2 hours; the mixed powder...

Embodiment 3

[0099] This embodiment is a method for preparing a three-layer structure of a SiC / SiC composite cladding tube, and the specific design is:

[0100] A three-layer structure of a SiC / SiC composite cladding tube, comprising

[0101] The inner layer is SiC whisker toughened SiC composite material layer;

[0102] The middle layer is SiC f Toughened SiC composite layer;

[0103] The outer layer is SiC whisker toughened SiC composite material layer;

[0104] The specific preparation method of the three-layer structure of the SiC / SiC composite cladding tube is:

[0105] Step 1: Prepare the inner layer of the SiC whisker toughened SiC composite tube, the specific process is:

[0106] (a1) Using 40% alcohol as a solution, disperse the mixed powder formed by SiC whiskers and SiC particles, and dry it after dispersing; the dispersion is ultrasonic for 30 minutes, and magnetically stirred for 2 hours; the mixed powder The volume ratio of SiC whiskers and SiC particles in the material ...

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Abstract

The invention discloses a multilayer structure of an SiC / SiC (silicon carbide) composite cladding tube and a preparation method of the multilayer structure. The multilayer structure of the SiC / SiC composite cladding tube is formed by alternately overlapping an SiC whisker toughening SiC composite layer and a continuous SiC fiber toughening SiC composite layer according to design needs. A three-layer overlapping structure takes the SiC whisker toughening SiC composite layer as an inner layer, a continuous SiC fiber toughening SiC composite material as a middle layer and a SiC whisker toughening SiC composite material as an outer layer; the multilayer structure can be formed by continuous alternate overlapping according to the design needs. The SiC whisker toughening SiC composite layer in the multilayer structure mainly plays a role of seal leakage prevention, meanwhile, the SiC whisker toughening SiC composite layer has high strength and toughness, the continuous SiC fiber toughening SiC composite layer plays a role of strength supporting, the multilayer structure of the SiC / SiC composite cladding tube has high crack resistance, high heat conductivity, high specific stiffness, high specific strength, excellent thermal shock and the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a multilayer structure of a cladding tube of SiC / SiC composite material used for nuclear reactor fuel and a preparation method thereof. Background technique [0002] In conventional nuclear reactor installations, fuel is contained in vacuum-sealed metal tubes (fuel cladding) of zirconium or steel alloys. During normal operation or accidents, these fuel claddings ensure that fission products and irradiated gases remain within the cladding and cannot be released into the coolant. Traditional metal cladding tubes have many problems. First, the metal cladding is relatively soft. When it is placed in the cooling system, it is easy to come into contact with the residue, causing the shell to wear and crack, which will lead to serious accidents caused by the leakage of fission products and coolant. Second, the cladding metal will undergo thermal deformation in a water vapor environment of 1000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B18/00C04B35/80C04B35/81C04B35/565C04B35/622
Inventor 成来飞张立同王一光刘永胜陈博付志强
Owner NORTHWESTERN POLYTECHNICAL UNIV
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