摘要
采用浆料涂覆加氧化的方法在Fe-21Cr合金上制备了Cu1.2Mn1.8O4尖晶石涂层。采用XRD、SEM、EDS等分析测试手段,对尖晶石涂层试样在氧化过程中物相、形貌以及成分的变化进行了表征。研究结果表明,在750℃空气中氧化800 h后尖晶石涂层试样涂层底部氧化过程中有(Cr,Fe)2O3氧化层生成。(Cu,Mn)3O4尖晶石涂层不但能有效地阻碍基体中Cr的向外扩散,并且能显著降低长期氧化过程中ASR的增长速率。750℃空气中(Cu,Mn)3O4尖晶石涂层将Fe-21Cr合金ASR抛物线速率常数从8.28×10-2 mΩ2.cm4.h-1降至1.87×10-2 mΩ2.cm4.h-1。
Cu1.2Mn1.8O4 coating was obtained on the surface of Fe-21Cr alloy by slurry coating and oxidation treatment.The changes of phases,morphology and composition of the coated samples were characterized by XRD,SEM and EDS.The result show that（Cr,Fe）2O3 oxide scale is present beneath the spinel coating after 800 h oxidation at 750 ℃ in air.Cu1.2Mn1.8O4 coating is not only a good barrier for Cr outward diffusion,but also can decrease the ASR parabolic rate constant of Fe-21Cr alloy from 8.28×10-2 mW2 cm4·h-1 to 1.87×10-2 mW2 ·cm4·h-1 in the long termoxidation process at 750 ℃.
出处
《电源技术》
CAS
CSCD
北大核心
2011年第3期340-343,共4页
Chinese Journal of Power Sources
基金
国家高科技研究发展计划("863"计划)资助项目(2007AA05Z151-3)
四川省应用基础研究计划(05JY029-026-1)
