镨砷铁三元系高温产物及相互作用机理研究

研究将镨、砷按不同原子比密封在工业纯铁缸体内,按一定升温程序升温到1273 K并保温20 h。再通过光学显微镜、X射线衍射仪、扫描电镜能谱分析等手段,探究Pr-As-Fe在高温的相互作用。结果表明:二元化合物PrAs和Fe2As以及饱和砷的α-Fe固溶体为Pr-As-Fe高温相互作用的主要生成物,同时伴有少量Fe17Pr2化合物的生成。增加原子比,PrAs量随着减少,Fe2As和饱和砷的α-Fe固溶体量增加。Pr-As-Fe三元高温体系中,砷原子的量影响铁原子的扩散,铁原子的扩散量随着比例的增加而增加。

Study on high temperature products and interaction mechanism of praseodymium arsenic and iron ternary system

In this study,bismuth and arsenic were sealed in industrial pure iron cylinders according to different atomic ratios,and the temperature was raised to 1273 K and kept warm for 20 hours according to a certain heating program.Optical microscopy,X-ray diffractometry and scanning electron microscopy were used to observe the interaction of Pr-As-Fe at high temperature.The results showed that the binary compounds PrAs and Fe2As and theα-Fe solid solution with saturated arsenic were the main products of the interaction of Pr-As-Fe at high temperature,and a small amount of Fe17Pr2 compounds formed.With the increase of atomic ratio,the amount of PrAs decreased,while the amount ofα-Fe solid solution of Fe2As and saturated arsenic increased.In the Pr-As-Fe ternary high temperature system,the amount of arsenic atoms affected the diffusion of iron atoms,and the amount of diffusion of iron atoms increased as the ratio increased.