Fu Chenghui, Huang Run, Xie Wenhao, Luo Jinxiao, Li Yulian, Zhang Jinzhu
School of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Saving, Guiyang 550025, China.
Materials (Basel). 2019 Sep 20;12(19):3060. doi: 10.3390/ma12193060.
In this study, Nd and As are mainly sealed into industrial pure Fe cylinders. The effect of different temperatures on the high-temperature interaction of an Nd-Fe-As ternary system is studied via X-ray diffraction, optical microscopy, and scanning electron microscopy after heat insulation for 30 h at 1173, 1223, and 1273 K. The results show that the common products under high-temperature interaction are NdAs, FeNd, and Fe. FeAs is present at 1173 K, whereas FeAs is produced at 1223 and 1273 K. The diffusion ability of Nd is weaker than that of As. Nd mainly diffuses through the Fe atomic vacancy mechanism. As mainly binds to Fe to form Fe and As compounds.
在本研究中，钕（Nd）和砷（As）主要被密封在工业纯铁圆柱体内。通过X射线衍射、光学显微镜和扫描电子显微镜，研究了在1173K、1223K和1273K下保温30小时后，不同温度对钕-铁-砷三元体系高温相互作用的影响。结果表明，高温相互作用下的常见产物为砷化钕（NdAs）、钕铁（FeNd）和铁（Fe）。在1173K时存在砷化铁（FeAs），而在1223K和1273K时生成FeAs。钕的扩散能力比砷弱。钕主要通过铁原子空位机制扩散。砷主要与铁结合形成铁和砷的化合物。
