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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Preliminary study on nano- and micro-composite sol-gel based alumina coatings on structural components of lead-bismuth eutectic cooled fast breeder reactors
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Preliminary study on nano- and micro-composite sol-gel based alumina coatings on structural components of lead-bismuth eutectic cooled fast breeder reactors

机译：铅-铋共晶冷却快增殖反应堆结构部件上基于纳米和微米复合溶胶-凝胶的氧化铝涂层的初步研究

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摘要

In order to protect the structural components of lead-bismuth eutectic cooled fast breeder reactors from liquid metal corrosion, Al2O 3 nano- and micro-composite coatings were developed using an improved sol-gel process, which includes dipping specimens in a sol-gel solution dispersed with fine α-Al_2O_3 powders prepared by mechanical milling. Accelerated corrosion tests were conducted on coated specimens in liquid lead-bismuth eutectic at 500 °C under dynamic conditions. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses revealed that the coatings are composed of α-Al_2O _3 and they are about 10 μm thick. After the corrosion tests, no spallation occurred on the coatings, and neither Pb nor Bi penetrated into the coatings, which indicates that the coatings possess an enhanced dynamic LBE corrosion resistance to lead-bismuth eutectic corrosion. The nano-structured composite particles integrated into the coatings play an important role in achieving such superior lead-bismuth eutectic corrosion resistance.
机译：为了保护铅铋共晶冷却快增殖反应堆的结构部件免受液态金属腐蚀，使用改进的溶胶-凝胶工艺开发了Al2O 3纳米和微复合涂层，其中包括将样品浸入溶胶-凝胶溶液中通过机械研磨制备的α-Al_2O_3细粉分散。在动态条件下，在500°C的液态铅-铋共晶中对涂层样品进行了加速腐蚀试验。扫描电子显微镜（SEM）和X射线衍射（XRD）分析表明，涂层由α-Al_2O_3组成，厚度约为10μm。腐蚀试验后，在涂层上没有剥落，并且Pb和Bi都没有渗入涂层，这表明涂层对铅-铋共晶腐蚀具有增强的动态LBE耐腐蚀性。集成到涂层中的纳米结构复合颗粒在实现这种优异的铅铋共晶耐蚀性中起着重要作用。

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