Application of Ti3SiC2 based ceramic material as melted fluorine salt corrosion resistant material

Abstract

The invention provides an application of a Ti3SiC2 based ceramic material as a melted fluorine salt corrosion resistant material. Through a large amount of experiments, the inventor finds that the corrosion speed of the Ti3SiC2 based ceramic material is extremely low in melted fluorine salt, and the melted fluorine salt corrosion resistant performance of the Ti3SiC2 based ceramic material is in the same level as that of inert metal nickel and nickel-based high-temperature alloy which are the best melted fluorine salt corrosion resistant materials. Thus the Ti3SiC2 based ceramic material can be used to build the structure of a molten salt reactor such as a shell, a container, a pipeline, and the like. The Ti3SiC2 based ceramic material can also be used as a functional electrode material in the post treatment of a spent fuel dry process taking fluorine salt as the electrolyte and can be painted on the alloy surface to form a film or coating so as to prevent melt fluorine salt corrosion.

Description

technical field [0001] The present invention relates to Ti 3 SiC 2 The technical field of ceramic-based materials, in particular, relates to the application of the ceramic material as a corrosion-resistant material for molten fluorine salts. Background technique [0002] my country is a country with small energy resources, and oil resources are quite poor. Especially with the rapid development of economy, the country's demand for energy is increasing day by day. Therefore, energy issues are related to the stability and development of the country. At present, thermal power accounts for about 80% of national electricity production, hydropower accounts for about 16%, and wind power and nuclear power account for the rest. Among them, nuclear energy has the advantages of high energy density, low carbon emissions, and potential sustainable development. Under the circumstances of global climate change, energy conservation, emission reduction, and low-carbon economy are promoting ...

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Problems solved by technology

They then specially designed the modified nickel-based alloy Hastelloy-N (17%Mo7%Cr, 5%Fe, and the rest is Ni), but Hastelloy-N lacks the high-temperature strength of other nickel-based and iron-nickel-based alloys, so Long-term service reliability remains to be resolved

[0009] Research at the University of Wisconsin-Madison has shown that the common superalloys Hastelloy-X, Haynes-230, and Inconel-617 are severely corroded in the high-temperature FLINAK molten salt environment, while Ni-201 (Ni content greater than 90%) shows Good corrosion resistance, but elemental pure nickel material lacks proper high temperature strength as a structural component, pyrolytic carbon (PyC) / SiC coating can improve the corrosion resistance of C / Si / SiC composite materials, Ni, Mo The coating can also improve the corrosion resistance of superalloy materials to a certain extent, but there are problems such as high temperature spalling and coating uniformity.

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