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Resistance tritium coating oxide nanopowder wet chemical methods prepared

Author: LiHuaWei
Tutor: WangNing
School: University of Electronic Science and Technology
Course: Materials Science and Engineering
Keywords: Wet chemical method Nanopowder YSZ Erbium oxide Resistance tritium penetration coating
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 53
Quote: 0
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Abstract


Tritium thermonuclear weapons and controlled thermonuclear reactor fuel has strong permeability and diffusion of tritium permeation can cause a range of problems, most metal materials. After years of research, the world is generally considered to solve the tritium permeation viable way to establish resistance tritium penetration coating on the stainless steel surface. Oxide coating has been a research focus in the resistance tritium penetration coating, nano technology can significantly improve the performance of all aspects of the coating preparation of oxide nanomaterials research for resistive tritium permeation barrier Therefore, this paper intends to focus on preparation The process conditions nanopowder morphology, structure, and ultimately Nanoparticles coating and verify the tritium barrier penetration effect. This article by hydrothermal method, sol - gel method maybe simple wet chemical prepared YSZ nanopowder. Mineralizing agent concentration on the hydrothermal method, hydrothermal temperature hydrothermal time to do the research, the results showed that the concentration of mineralizing agent for 10mol / L, hydrothermal temperature and time were 250 ° C, 48 h, the YSZ best powder crystallization. Heat treatment temperature of the sol - gel method to do the research, the results show that the best treatment temperature to 500 ℃, available to a particle size of about 50nm particles, the YSZ nanopowder suitable for the preparation of coating. The paper by hydrothermal method Er2O3 nanopowders were prepared by homogeneous precipitation method both simple wet-chemical process. In the hydrothermal method, the hydrothermal temperature, hydrothermal time, and the firing of the impact of the powder made. The results show that in the temperature of the water and heat to 140 ° C, hydrothermal time 16h can be obtained when the aspect ratio of 15:1 to 20:1 uniformly dispersed erbium oxide powder. Hydrothermal products obtained after 700 ° C and calcined a good crystallinity pure erbium oxide. Homogeneous precipitation method can be successfully prepared by uniformly dispersed, a regular morphology of the nano-Er2O3 powder, erbium oxide powder obtained in the 700 ° C calcination temperature, crystalline Preferably, the particle diameter of 100 ~ 200nm, the The Er2O3 nano powder suitable for preparing a coating. Obtained on the basis of two nano-powders suitable for preparing coating of YSZ and Er2O3, with a simple process to prepare the coating on the metal base, and test their resistance tritium permeation performance, verify the effect of the two oxides tritium permeation barrier. The results show that the the YSZ coating resistance tritium permeation effect is very weak, Er2O3 coating tritium permeation barrier effect is obvious, but the performance is still below the international advanced level.

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