作　　者： ; ;

机构地区： 惠州学院电子科学系

出　　处： 《矿冶工程》 2010年第4期83-85,共3页

摘　　要： 研究了Ce-10La合金(原子分数)在100℃水蒸气中的表面气相反应行为,描述并探讨了合金在气化过程中表面层组织结构和形貌的演变规律,讨论了氢气的存在对Ce-10La合金与水蒸气表面反应的影响。结果表明,Ce-10La合金在水蒸气中被迅速氧化为Ce2O3,并被进一步氧化为CeO2,形成疏松的表面层,但经过2 h的反应后Ce-10La合金仍可保持块体形状。在100℃水蒸气和氢气混和气氛中,Ce-10La合金优先与水蒸气反应,形成稀土氢氧化物并释放出氢气,氢氧化物遇空气后会部分被氧化为CeO2。氢气的存在降低合金与水蒸气的反应速度和反应程度。 The surface gas-phase reaction behaviors of Ce-10La alloy（atom fraction） in steam at 100 ℃ and the evolution rule of surface microstructure and morphology of the alloy during the gasification were investigated.The effect of hydrogen on the surface reaction of Ce-10La alloy with steam was discussed as well.The results showed that Ce-10La alloy was oxidized into Ce2O3 rapidly in steam,which was further turned into CeO2 to form loose surface layer.The Ce-10La alloy still kept the form of block after 2 hrs reaction.In the mixed gas of 100 ℃-steam and hydrogen,Ce-10La alloy first reacted with steam and formed rare earth hydroxides with hydrogen released.The formed hydroxides were partly oxidized into CeO2 when they met air.The existence of hydrogen in the steam can slow down the rate and extent of reaction of the alloy with steam.

关 键 词： 稀土合金 合金 水蒸气 表面气化反应

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]