Polycrystalline diamond coating is a promising possibility for prevention, or reduction of high temperature oxidation of zirconium alloys. Zirconium alloys are used as cladding material in almost all types of nuclear reactors, where creates a barrier between nuclear fuel and cooling water in the primary circuit. Hydrogen and considerable amount of heat is released during steam oxidation that may occur in an eventual accident. In this paper Zircaloy-2 alloy was covered by polycrystalline diamond layer using Plasma Enhanced Linear Antennas Microwave Chemical Vapor Deposition system reactor. X-Ray Diffraction and Raman spectroscopy measurements confirmed coverage of the surface area with crystalline and amorphous carbon layer. Characterizations were done for zirconium alloy covered with diamond layer before and after corrosion and irradiation tests - ion beam irradiation tests and high temperature steam exposure.

Volume Subject Area:
Nuclear Fuel and Materials
Topics:
Cladding systems (Building), Diamond films, Fuels, Zirconium alloys, Diamonds, Oxidation, Accidents, Alloys, Carbon, Chemical vapor deposition, Circuits, Cooling, Corrosion, Heat, High temperature, High temperature steam, Hydrogen, Ion beam irradiation, Irradiation (Radiation exposure), Microwaves, Nuclear fuels, Nuclear reactors, Plasmas (Ionized gases), Raman spectroscopy, Steam, Water, X-ray diffraction
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