摘要
为探索一种核电用包壳材料FeCrAl合金表面涂层的制备方法,本文利用多弧离子镀技术在FeCrAl合金表面制备了以FeCrAl作为过渡层的Al_(2)O_(3)-TiO_(2)涂层,对试样进行热冲击实验以探究涂层的抗热冲击性能,对试样进行600℃、1000 h静态铅铋合金(LBE)腐蚀实验,研究涂层的耐腐蚀性能,表征和分析了试样经LBE腐蚀前后的相组成和显微形貌。结果表明,通过多弧离子镀制备的Al_(2)O_(3)-TiO_(2)为非晶态,30次热冲击试验后涂层未出现开裂、脱落等现象。腐蚀后,FeCrAl基体试样表面发生明显溶解腐蚀。而X射线衍射分析显示涂层试样在腐蚀后Al_(2)O_(3)发生结晶,表层Al_(2)O_(3)结构收缩出现孔隙,而涂层内部仍保持致密,且截面分析显示LBE未渗入涂层内部。因此,Al_(2)O_(3)-TiO_(2)/FeCrAl涂层能有效地阻止LBE对基体材料的腐蚀。
This work aims to explore a method for preparing the surface coating of FeCrAl alloy,a cladding material in nuclear power industry.The Al_(2)O_(3)-TiO_(2)coating with FeCrAl as the intermediate layer was prepared on FeCrAl alloy by multi-arc ion plating.The thermal-shock test was carried out to explore the thermal-shock resistance of the coating.The corrosion resistance of the coating was studied after the static lead-bismuth eutectic(LBE)corrosion test at 600℃for 1000 h.The phase composition and micromorphologies of substrate and coating samples before and after LBE corrosion were characterized.The results showed that the Al_(2)O_(3)-TiO_(2)prepared by multi-arc ion plating was amorphous.After 30 thermal shock tests,the coating did not crack or fall off.After the corrosion,the surface of FeCrAl substrate showed obvious dissolution corrosion.GIXRD results showed that Al_(2)O_(3)crystallization occurred in the coating samples after corrosion.The Al_(2)O_(3)structure on the surface shrank and pores appeared,while the inner layer of the coating remained dense.The sectional analysis showed that LBE did not penetrate into the coating.Therefore,the Al_(2)O_(3)-TiO_(2)/FeCrAl coating can effectively protect the substrate from LBE corrosion.
作者
张顺蔺
潘东
尹星
陈勇
赵海波
孙兰
王均
Zhang Shunlin;Pan Dong;Yin Xing;Chen Yong;Zhao Haibo;Sun Lan;Wang Jun(School of Mechanical Engineering,Sichuan University,Chengdu,610065,China;Nuclear Power Institute of China,Chengdu,610213,China;Analytical&Testing Center,Sichuan University,Chengdu,610065,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2024年第1期90-97,共8页
Nuclear Power Engineering
基金
四川大学—中国核动力研究设计院2022年度联合创新基金(SCU&DRSI-LHCX-20)。
