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MAX phase ceramic pipe and preparation method thereof as well as nuclear fuel cladding tube

A technology for ceramic tubes and raw materials, applied in the field of nuclear fuel cladding tubes, can solve problems such as the preparation method of nuclear-grade ceramic cladding tubes that are not involved, and achieve the effects of improving accident resistance and safety threshold, expanding applications, and improving fracture toughness.

Active Publication Date: 2018-06-12
GUANGDONG NUCLEAR POWER JOINT VENTURE +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still limited to the interface bonding between the fiber and the matrix, the study of the toughening mechanism, etc., and does not involve the research on the preparation method of the nuclear-grade ceramic cladding tube.
In addition, for nuclear-grade ceramic pipes, the technical barriers of toughened MAX-phase ceramic cladding pipes with uniform wall thickness and controllable length have not yet been broken through.

Method used

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preparation example Construction

[0023] The preparation method of the MAX phase ceramic pipe of the present invention may comprise the following steps:

[0024] S1. Weigh the raw materials in the following mass percentages: 5%-15% binder, 5%-15% plasticizer and 2%-15% fiber toughening phase; add the raw materials into deionized water to prepare a suspension Cloudy liquid.

[0025] Wherein, the fiber toughening phase includes one or more of chopped fibers and whiskers. Chopped fibers include one or more of carbon fibers, silicon carbide fibers, silicon nitride fibers, and alumina fibers. The binding agent can adopt hydroxypropyl methylcellulose, and the plasticizer can adopt polyethylene glycol.

[0026] The prepared suspension is also subjected to ultrasonic stirring to achieve uniform mixing of raw materials.

[0027] S2. Add the suspension to the MAX phase nanopowder to prepare a slurry with a solid content of 60%-90%.

[0028] In the slurry, deionized water and MAX phase nanopowder are added in appropr...

Embodiment 1

[0045] First weigh 100g of hydroxymethyl 3-grade cellulose, 100g of polyethylene glycol, 170ml of deionized water and 100g of chopped carbon fiber to prepare a suspension, mix well with ultrasonic stirring, and gradually add to 2000g of Ti 3 SiC 2 In the nano powder, use a ball mill to stir evenly. The extrusion pressure is 10MPa, and the Ti with wall thickness 1mm and diameter 10mm is prepared by extrusion molding 3 SiC 2 After the ceramic tube blank was left to dry for 24 hours, the toughened Ti 3 SiC 2 ceramic tubing. The obtained pipe has a density of over 90%, a tensile strength of 350MPa, and a fracture toughness of 12MPa m 1 / 2 , under the condition of 1200°C water vapor, the oxidation weight gain is two orders of magnitude lower than that of commercial zirconium alloys.

Embodiment 2

[0047] First weigh 100g of hydroxymethyl 3-grade cellulose, 75g of polyethylene glycol, 100ml of deionized water and 60g of Al 2 o 3 Fiber, prepared into a suspension, mixed evenly with ultrasonic stirring, gradually added to 1000g of Ti 3 AlC 2 In the nano powder, use a ball mill to stir evenly. The extrusion pressure is 8MPa, and the Ti with wall thickness 1mm and diameter 10mm is prepared by extrusion molding machine 3 AlC 2 Ceramic tube blanks, after drying for 24 hours, use a tube furnace at 1500 ° C under an argon atmosphere to obtain toughened Ti 3 AlC 2 ceramic tubing. The density of the pipe is over 92%, the tensile strength is 380MPa, and the fracture toughness is 11MPa m 1 / 2 , under the condition of 1200°C water vapor, the oxidation weight gain is two orders of magnitude lower than that of commercial zirconium alloys.

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Abstract

The invention discloses an MAX phase ceramic pipe and a preparation method thereof as well as a nuclear fuel cladding tube. The preparation method comprises the following steps: S1, weighing the following raw materials in percentage by mass: 5 to 15 percent of binding agent, 5 to 15 percent of plasticizing agent and 2 to 15 percent of fiber toughening phases; adding the raw materials into deionized water to prepare turbid liquid; S2, adding the turbid liquid into MAX phase nano-powder to prepare slurry of which solid content is 60 to 90 percent; S3, making the slurry into an MAX phase ceramicpipe blank by adopting an extrusion molding method; S4, performing pressureless sintering on the MAX phase ceramic blank to prepare the MAX phase ceramic pipe. The MAX phase ceramic pipe disclosed bythe invention is suitable for the accident fault-tolerant nuclear fuel cladding, so that the anti-accident ability that nuclear reactors maintain nuclear fuel assembly structures and function completeness under a serious accident working condition is greatly improved.

Description

technical field [0001] The invention relates to the technical field of nuclear fuel, in particular to a MAX-phase ceramic pipe material that can be used for nuclear fuel, a preparation method thereof, and a nuclear fuel cladding tube. Background technique [0002] After the nuclear accident, nuclear power safety has once again become the focus of international public attention, and how to further improve the safety of nuclear power, especially the safety threshold of nuclear reactors against nuclear accidents beyond the design basis, has also become an important issue for the sustainable development of nuclear energy. Accident Tolerant Fuels (ATF), a new concept of nuclear safety technology, was born under this background, and has gradually become one of the most important research topics in the world's nuclear power industry. The uranium dioxide fuel system is improved, upgraded or even fully replaced to reduce the reaction enthalpy and hydrogen generation of the cladding a...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/56C04B35/622G21C3/07
CPCC04B35/806C04B35/5607C04B35/5615C04B35/5618C04B35/622C04B2235/5224C04B2235/5248C04B2235/5276G21C3/07C04B35/58014C04B35/58028C04B35/58042C04B35/6263C04B35/6365C04B35/80C04B2235/524C04B2235/5454C04B2235/6021C04B2235/6562C04B2235/6567C04B2235/77C04B2235/94C04B2235/96Y02E30/30
Inventor 李思功薛佳祥刘彤黄恒李锐高思宇
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE
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