Manufacturing method of carbide, boride or nitride coated fuel using high temperature and high pressure combustion synthesis

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for producing a fuel coated with carbides, borides or nitrides, and reacts with pyrolitic carbon, boron or nitrogen on a fuel surface to form carbides, Compounds capable of forming borides or nitrides, and ii) pyrolysis of carbon, boron or nitrogen on the surface of the nuclear fuel by chemical vapor deposition, gas permeation or sputtering, sequentially or in reverse order, and then the layers at high temperature. And a method of producing a nuclear fuel in which carbides, borides or nitrides and composites thereof are applied by lamination by combustion synthesis at high pressure. The manufacturing method of the present invention is cheaper than the conventional manufacturing method of applying silicon carbide (SiC) and other carbides to the particle type nuclear fuel surface, and can be decomposed at low temperature, and harmful byproducts are generated after the reaction. Due to the use of less silanes, boranes and other compounds, it is possible to apply economically in a short time without affecting the characteristics of the nuclear fuel during the application process, and pyrolytic carbon deposited on the surface of the nuclear fuel by high temperature combustion synthesis It is an excellent manufacturing method that can effectively apply borides and nitrides to the desired surface of the nuclear fuel as a good manufacturing method that can control and maintain the fine crystal structure because it forms a carbide layer by reacting with silicon and the like.