Ca-Ti-Y-Al-Si-O microcrystalline glass brazing filler metal and glass packaging method for nuclear cladding tube port

A technology of glass-ceramics and cladding tubes, which is applied in nuclear engineering, nuclear power generation, measuring devices, etc., to achieve excellent sealing effects, no side effects, radiation resistance, and low viscosity at high temperatures

Pending Publication Date: 2021-07-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CYAS glass is packaged in a pure glass phase and has no crystalline phase inside. In order to further improve its high-temperature mechanical properties, it is necessary to improve the existing packaging technology.

Method used

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  • Ca-Ti-Y-Al-Si-O microcrystalline glass brazing filler metal and glass packaging method for nuclear cladding tube port
  • Ca-Ti-Y-Al-Si-O microcrystalline glass brazing filler metal and glass packaging method for nuclear cladding tube port
  • Ca-Ti-Y-Al-Si-O microcrystalline glass brazing filler metal and glass packaging method for nuclear cladding tube port

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use CaO and TiO with a particle size of ~1μm 2 , Y 2 o 3 、Al 2 o 3 , SiO 2 Powder, its mass ratio is: 5% CaO, 5% TiO 2 , 20% of Y 2 o 3 , 30% Al 2 o 3 , 40% SiO 2 , put the four kinds of powders into a ball mill jar and mill them at a speed of 300r / min for 12 hours, put the mixed powders after ball milling in an alumina crucible, and perform heat treatment in an air atmosphere. The heat treatment temperature is 1650°C, and the holding time is 2 Hours, after heat treatment, it is directly placed in cold water for rapid cooling to form a Ca-Ti-Y-Al-Si-O glass block. The glass blocks were crushed and ball-milled, and sieved through a 150-mesh sieve to obtain Ca-Ti-Y-Al-Si-O glass powder. Alcohol is added to the glass powder to form an encapsulating agent, and the mass fraction of the added alcohol is 90%. Coat the encapsulant on the inner wall of the cladding tube and the surface of the cladding tube plug to be encapsulated, place a glass sheet with a thickness...

Embodiment 2

[0035] Use CaO and TiO with a particle size of ~1μm 2 , Y 2 o 3 、Al 2 o 3 , SiO 2 Powder, its mass ratio is: 3% CaO, 2% TiO 2 , 30% of Y 2 o 3 , 25% Al 2 o 3 , 40% SiO 2 , Put the four kinds of powders into the ball milling pot and mill them at a speed of 200r / min for 15 hours, put the mixed powders after ball milling in an alumina crucible, and carry out heat treatment in an air atmosphere. The heat treatment temperature is 1630°C, and the holding time is 2 Hours, after heat treatment, it is directly placed in cold water for rapid cooling to form a Ca-Ti-Y-Al-Si-O glass block. The glass blocks were crushed and ball-milled, and sieved through a 150-mesh sieve to obtain Ca-Ti-Y-Al-Si-O glass powder. Alcohol is added to the glass powder to form an encapsulating agent, and the mass fraction of the added alcohol is 70%. Coat the encapsulant on the inner wall of the cladding tube and the surface of the cladding tube plug to be encapsulated, place a glass sheet with a th...

Embodiment 3

[0037] Use CaO and TiO with a particle size of ~1μm 2 , Y 2 o 3 、Al 2 o 3 , SiO 2 Powder, its mass ratio is: 5% CaO, 3% TiO 2 , 27% of Y 2 o 3 , 20% Al 2 o 3 , 45% SiO 2 , put the four kinds of powders into the ball milling pot and mill them at a speed of 200r / min for 13 hours, put the mixed powders after ball milling in an alumina crucible, and heat-treat them in an air atmosphere. The heat-treatment temperature is 1600°C and the holding time is 4 Hours, after heat treatment, it is directly placed in cold water for rapid cooling to form a Ca-Ti-Y-Al-Si-O glass block. The glass blocks were crushed and ball-milled, and sieved through a 150-mesh sieve to obtain Ca-Ti-Y-Al-Si-O glass powder. Alcohol is added to the glass powder to form an encapsulating agent, and the mass fraction of the added alcohol is 90%. Coat the encapsulant on the inner wall of the cladding tube and the surface of the cladding tube plug to be encapsulated, place a glass sheet with a thickness of...

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Abstract

The invention relates to a Ca-Ti-Y-Al-Si-O microcrystalline glass brazing filler metal and a glass packaging method for a SiCf / SiC nuclear cladding tube port. Raw materials which are excellent in radiation resistance and have no side effect on a nuclear reaction process are selected, and a melting-water cooling method is adopted to prepare the microcrystalline glass brazing filler metal which is excellent in mechanical property and good in air tightness. According to the characteristics that the high-temperature viscosity is small, the coefficient of thermal expansion is matched with SiCf / SiC, and the wettability is good, packaging and connection of a SiCf / SiC nuclear cladding tube port are achieved at the application temperature (lower than or equal to 1450 DEG C) of domestic third-generation SiC fibers and under the non-pressure condition, the prepared connecting joint contains both a glass phase and a crystal phase, the glass phase guarantees the excellent sealing effect at the high temperature, the crystal phase is favorable for improving the high-temperature strength and promoting the application of SiCf / SiC in the nuclear reactor, so that the risk of accidents such as nuclear radiation and nuclear leakage is reduced, and the operation safety of the nuclear reactor is improved.

Description

technical field [0001] The invention belongs to the packaging technology of nuclear fuel cladding tubes, and relates to a Ca-Ti-Y-Al-Si-O glass-ceramic solder and SiC f / Glass encapsulation method for SiC core cladding tube port, specifically related to SiC f Preparation and packaging technology of Ca-Ti-Y-Al-Si-O glass encapsulant and glass tablet at the port of SiC core cladding tube, which are mainly used for port encapsulation and connection of core cladding tube. Background technique [0002] On March 11, 2011, a 9.0-magnitude earthquake occurred near the coast of Sendai, Japan. The earthquake and the powerful tsunami it triggered severely damaged the Fukushima Daiichi Nuclear Power Plant under the Tokyo Electric Power Company, triggering a nuclear leak. Nuclear accident. The direct cause of the Fukushima nuclear accident was that the power supply system of the unit was cut off due to the tsunami, the water circulation in the loop system stopped, the cooling system f...

Claims

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Application Information

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IPC IPC(8): C03C8/24C03C10/04C04B37/00G21C3/07
CPCC03C8/24C03C10/00C04B37/003G21C3/07C04B2237/10C04B2237/38C04B2237/365C04B2237/84Y02E30/30
Inventor 范尚武杨少博王乐马玉洁成来飞李晓强陈博刘传歆
Owner NORTHWESTERN POLYTECHNICAL UNIV
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