Ontology type: schema:ScholarlyArticle
2015-08-18
AUTHORSHai-Bo Chen, Jing-Wu Zheng, Liang Qiao, Yao Ying, Li-Qiang Jiang, Sheng-Lei Che
ABSTRACTSm2Fe17 alloy is the intermediate material for the preparation of Sm2Fe17Nx (x ≈ 3); thus, the synthesis of pure Sm2Fe17 mother alloy is the key to obtaining high-performance Sm2Fe17Nx. Reduction–diffusion (R–D) is a cost-effective method. In this study, the R–D process of synthesizing Sm2Fe17 was analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray fluorescence (XRF). Furthermore, the influences of the tightness of compacted reactants, the compensation amount of Sm2O3, and the particle size of Fe on the formation of Sm2Fe17 were discussed from the aspects of the three raw materials. The results show that Sm reduced from Sm2O3 reacts with Fe particles to form intermetallic compound Sm2Fe17 directly in the R–D reaction process of preparing Sm2Fe17; the generation of Sm and its migration to the surface of Fe particles control the reaction rate; a proper tightness of compacted reactants is necessary for ensuring the purity of Sm2Fe17 product; pure Sm2Fe17 can be obtained when the compensation of Sm2O3 is 33 % of the stoichiometry; and the sufficiency of the reaction improves with the decrease in the size of Fe powders under the same reaction condition. More... »
PAGES989-994
http://scigraph.springernature.com/pub.10.1007/s12598-015-0584-4
DOIhttp://dx.doi.org/10.1007/s12598-015-0584-4
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