Abstract
In this study, neodymium and arsenic were sealed into industrial pure iron cylinders at a temperature of 1223 K for 50 h. The interaction mechanism of the Nd–Fe–As system at various atomic ratios was investigated by optical microscopy, X-ray diffractometry, and scanning electron microscopy. Binary compounds Fe12As5, NdAs, Fe2As, and Fe17Nd2 were the main products formed, with traces of NdFeAs compounds. In addition, at high temperatures, As content affected the diffusion of Fe atoms; the diffusion of Fe increased with an increase in the atomic ratio. Furthermore, the diffusion ability of Nd was weaker than that of As. The major diffusion mechanism of Nd was through the Fe atomic vacancy mechanism. As mainly bind to Fe to form Fe and As compounds. The formation of ternary compounds was confirmed by laboratory experiments and mismatch calculations.
Highlights
In this study, neodymium and arsenic were sealed into industrial pure iron cylinders at a temperature of 1223 K for 50 h
China has a large amount of iron ore containing arsenic, but with the development of social economy, the scrap cycle of steel is gradually shortened
One of products of RE-Fe-As ternary system named EuFe2As224–28 has attracted significant attention. Xie29and Fu30 investigated the interaction of Nd–Fe–As system at high temperatures and found that the formation of the ternary compound NdFeAs depends on the formation of NdAs and F eAs2
Summary
Neodymium and arsenic were sealed into industrial pure iron cylinders at a temperature of 1223 K for 50 h. Xie29and Fu30 investigated the interaction of Nd–Fe–As system at high temperatures and found that the formation of the ternary compound NdFeAs depends on the formation of NdAs and F eAs2.
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