Study on High-Temperature Interaction Mechanism of Nd-Fe-As System.

Chenghui Fu,Jinzhu Zhang,Yulian Li,Jinxiao Luo,Wenhao Xie,Run Huang

doi:10.3390/ma12193060

Abstract

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, Fe17Nd2, and Fe. Fe12As5 is present at 1173 K, whereas Fe2As 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.

Highlights

With the progress of science and technology and the continuous need for social development, the world’s steel output has reached 2 billion tons per year
Fe, and As at low-melting point is studied via optical microscopy, scanning electron microscopy, can form the ternary compounds RE12 Fe57.5 As41 (RE=La, Ce) and FeAs at 1173 K [14,15]
The oxide film on the Nd surface was removed, and the granulated rare earth Nd and As and As at low-melting point is studied via optical microscopy, scanning electron microscopy, and X-ray were weighed on the basis of a certain mass and filled into the cylinder

Summary

Introduction

With the progress of science and technology and the continuous need for social development, the world’s steel output has reached 2 billion tons per year. NdAs and FeAs2 are likely to be Materials 2019, 12, 3060 prerequisites for the formation of the ternary compound NdFeAs. On the basis of this finding, a certain quality of Nd and As seals are heated to 1173, 1223, and. Fe, and As at low-melting point is studied via optical microscopy, scanning electron microscopy, can form the ternary compounds RE12 Fe57.5 As41 (RE=La, Ce) and FeAs at 1173 K [14,15]. The oxide film on the Nd surface was removed, and the granulated rare earth Nd and As and As at low-melting point is studied via optical microscopy, scanning electron microscopy, and X-ray were weighed on the basis of a certain mass and filled into the cylinder.

Methods

Results and Discussion

Analysis of Elemental Distribution in Sample

Conclusions