铅铋共晶(lead-bismutheutectic,LBE)合金具有化学活性低、热特性杰出、耐辐照等优异特性,在核领域具有广泛的应用前景,是第4代核能系统铅冷快堆(lead-cooled fast reactor,LFR)冷却剂的首选材料。然而,高温、高流速、高密度的液态LBE...铅铋共晶(lead-bismutheutectic,LBE)合金具有化学活性低、热特性杰出、耐辐照等优异特性,在核领域具有广泛的应用前景,是第4代核能系统铅冷快堆(lead-cooled fast reactor,LFR)冷却剂的首选材料。然而,高温、高流速、高密度的液态LBE会对核电材料造成严重腐蚀,威胁其服役安全。因此,全面认识与分析应用LBE所面临的挑战,对于解决LBE与结构材料相容性的关键科学和实际工程问题,以及核能的可持续发展具有重要意义。简介了LBE冷却剂的特点,系统地论述了近年来关于LBE腐蚀机理、影响因素的研究现状,针对目前的控制溶解氧气浓度、结构材料设计和腐蚀防护涂层这3种主要解决方案的基本原理、防护机制及国内外最新研究进展进行了较为全面地分析。最后,总结了目前研究中存在的主要问题与不足,并展望了未来发展前景。展开更多
A ceramic matrix coating for minimizing steel loss of stainless steel at high temperatures was prepared by handled air-spraying technique, and the influence of coating on surface quality of stainless steel was mainly ...A ceramic matrix coating for minimizing steel loss of stainless steel at high temperatures was prepared by handled air-spraying technique, and the influence of coating on surface quality of stainless steel was mainly investiga ted in laboratory. Experimental results showed that the protective coating reduced the oxidation of stainless steel by more than 91% and minimized high temperature scaling and also enhanced steel surface quality. The scales of coated specimen were removed completely and the scales of uncoated specimen were partly residual on the surface after cool ing process. Mn-rich and Fe-rich zones were found in the oxides. The Cr2 O3 found in scales came from the underlying stainless steel and formed a Cr rich layer along the spalled surface.展开更多
文摘铅铋共晶(lead-bismutheutectic,LBE)合金具有化学活性低、热特性杰出、耐辐照等优异特性,在核领域具有广泛的应用前景,是第4代核能系统铅冷快堆(lead-cooled fast reactor,LFR)冷却剂的首选材料。然而,高温、高流速、高密度的液态LBE会对核电材料造成严重腐蚀,威胁其服役安全。因此,全面认识与分析应用LBE所面临的挑战,对于解决LBE与结构材料相容性的关键科学和实际工程问题,以及核能的可持续发展具有重要意义。简介了LBE冷却剂的特点,系统地论述了近年来关于LBE腐蚀机理、影响因素的研究现状,针对目前的控制溶解氧气浓度、结构材料设计和腐蚀防护涂层这3种主要解决方案的基本原理、防护机制及国内外最新研究进展进行了较为全面地分析。最后,总结了目前研究中存在的主要问题与不足,并展望了未来发展前景。
基金Item Sponsored by National Natural Science Foundation of China(51202249)Key Projects in National Science and Technology Pillar Program in the Twelfth Five-year Plan of China(2012BAB08B04)
文摘A ceramic matrix coating for minimizing steel loss of stainless steel at high temperatures was prepared by handled air-spraying technique, and the influence of coating on surface quality of stainless steel was mainly investiga ted in laboratory. Experimental results showed that the protective coating reduced the oxidation of stainless steel by more than 91% and minimized high temperature scaling and also enhanced steel surface quality. The scales of coated specimen were removed completely and the scales of uncoated specimen were partly residual on the surface after cool ing process. Mn-rich and Fe-rich zones were found in the oxides. The Cr2 O3 found in scales came from the underlying stainless steel and formed a Cr rich layer along the spalled surface.
