恒温时间对铈铁砷交互作用的影响

Effect of Isothermal Time on the Interaction of Cerium, Iron and Arsenic

将铈和低熔点砷按铈砷原子比为1∶3封入自制H08钢缸体中加热至1273 K下恒温不同时间后,采用光学显微镜、XRD、扫描电镜和EDS能谱微区等现代分析手段,对不同条件下所得试样中铈铁砷系的交互作用产物进行分析,研究不同恒温时间对铈铁砷系交互作用的影响。结果表明,对于不同的恒温时间,以恒温30 h时试样的组织分布最为均匀;二元化合物Ce As和Fe2As与一定的三元系化合物Ce12Fe57. 5As41是铈铁砷交互作用的主要产物;在1 h^50 h恒温时间范围内,Ce As和Fe2As的含量随恒温时间的延长呈现先升高后降低的趋势,且Ce As和Fe2As是铈铁砷系三元化合物形成的基础。

In this paper,cerium and low melting point arsenic in the atomic ratio of 1∶3 were sealed into self-made H08 steel cylinder body and heated up to 1273 K under different isothermal time.The effects of isothermal time on the interaction of cerium with iron and arsenic were studied by metalloscope,XRD,SEM and EDS.Results show that the phase structure distribution is the most uniform as keeping at different temperatures for 30 h.The binary compounds CeAs and Fe2As and some ternary compounds Ce12Fe57.5As41 are the main products of the interaction of cerium with iron and arsenic.When the isothermal time in range of 1 h^50 h,the content of CeAs and Fe2As increased first and then decreased with the extension of the isothermal time,and binary compounds CeAs and Fe2As are the basis for the formation of ternary compounds Ce12Fe57.5As41.