Nanometer silicon carbide particle-enhanced nickel-based composite material and reactor core structure component of molten salt reactor

A technology of nano-silicon carbide and composite materials, which is applied in the field of metal-based reinforced materials, can solve the problems of carbon-based composite materials such as connectivity and processability, and achieve good plasticity, increase corrosion performance, and improve tensile strength.

Inactive Publication Date: 2015-08-26
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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However, the connectivity and processability of carbon-based composites h

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  • Nanometer silicon carbide particle-enhanced nickel-based composite material and reactor core structure component of molten salt reactor
  • Nanometer silicon carbide particle-enhanced nickel-based composite material and reactor core structure component of molten salt reactor
  • Nanometer silicon carbide particle-enhanced nickel-based composite material and reactor core structure component of molten salt reactor

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[0028] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0029] Although nickel-based alloys have been explored for use in molten salt reactors as early as the 1960s, due to the large neutron absorption cross-section of nickel, it is easy to react with neutrons to produce helium, and then form helium bubbles inside the nickel-based alloy. A large number of helium bubbles gathered at the grain boundaries will reduce the bonding force between the grain boundaries of the alloy, resulting in direct embrittlement of the material; the helium bubbles formed inside the alloy grains will pin the free movement of dislocation lines, resulting in hardening and Embrittlement; the formation of helium bubbles can also cause swelling of the material, which in turn affects the service performance of the alloy. ORNL's report also clearly pointed out the helium embrittlement of nickel-based alloys, and clearly opposed the use o...

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Abstract

The invention discloses a nanometer silicon carbide particle-enhanced nickel-based composite material, and belongs to the technical field of metal-based enhanced materials. The nanometer silicon carbide particle-enhanced nickel-based composite material disclosed by the invention comprises the following raw materials in percentage by weight: 96.5-99wt% of nickel as a metal matrix and 1-3.5wt% of nanometer silicon carbide particles as reinforcement. The nickel metal is enhanced with a proper amount of nanometer silicon carbide particles; corresponding preparation technology parameters are assisted; the obtained nickel-based composite material has excellent high-temperature strength properties and fluoride salt corrosion resistance characteristics, and especially has excellent high-temperature irradiation characteristics; and a new direction is pointed out for research of a reactor core structure component material of a commercial molten salt reactor.

Description

technical field [0001] The invention relates to the technical field of metal-based reinforced materials, in particular to a nano-silicon carbide particle-reinforced nickel-based composite material. Background technique [0002] As one of the most advanced fission reactors, the molten salt reactor can effectively realize the thorium-uranium fuel cycle, so as to realize the utilization of thorium energy to solve the continuous growth of energy demand and the CO 2 Double pressure to reduce emissions. The high temperature, strong neutron irradiation and strong corrosive service environment in molten salt reactors pose challenges to the alloy structural materials in the reactor. The IRP (Integrated Research Project) research program deployed by the U.S. Department of Energy launched the research on fluorine-salt cooled high-temperature reactor (FHR), and its report clearly pointed out that the selection of structural materials in molten salt reactors is mainly based on the follo...

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Application Information

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IPC IPC(8): C22C19/03
Inventor 杨超黄鹤飞周兴泰
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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