Study on the interaction products among Ce-As-Fe at 1173K

3rd International Conference on New Material and Chemical Industry

材料科学;化学工业

Qin, B.K.^1 ; Xie, W.H.^1 ; Yang, Y.S.^1 ; Hou, Y.P.^1 ; Zhang, J.Z.^1

College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou

550025, China^1

关键词: Binary compounds;    CE systems;    Rare earth metals;    Ternary compounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/479/1/012031/pdf
DOI  :  10.1088/1757-899X/479/1/012031

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The interaction among rare earth metals, arsenic and iron has been paid certain attention recently. The products interacted among iron, cerium and arsenic at 1173 K in the pressure tight cylinder machined by H08 steel were studied by means of X ray diffraction and electron probe microanalysis to understand what compounds could be developed and how about their stability chemically. The results show that the ternary compound Ce12Fe57.5As41 and the binary compound CeAs can be developed at 1173 K on the condition that the molar ratio of arsenic to cerium is between 1.5 to 3; the amount of the Ce12Fe57.5As41 increases with the molar ratio of arsenic to cerium increasing; the amount of the CeAs increases with the amount of the Ce12Fe57.5As41 decreasing; and the sum of the percentages of both the CeAs and the Ce12Fe57.5As41 is roughly the same in the products developed when the molar ratio of arsenic to cerium is between 2 to 3. The compound Ce12Fe57.5As41 is chemically more stable than the compound CeAs in air room temperature. The binary compound Fe2As is the other one main product developed at 1173 K in the Fe-As-Ce system, and both the binary compounds Fe2As and CeAs should be the basis of the Ce12Fe57.5As41 developed in the Fe-As-Ce system.