Phase diagram of the Nd2Fe14B–Sm2Fe14B pseudo-binary system
| Autor: | Ch. F. Xu, L. Y. Cheng, D. D. Ma, G. H. Rao, K. H. Chen, Q. R. Yao, Gang Cheng, Gu Zhengfei |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Analytical chemistry 02 engineering and technology Crystal structure 021001 nanoscience & nanotechnology 01 natural sciences General Biochemistry Genetics and Molecular Biology Tetragonal crystal system Differential thermal analysis 0103 physical sciences Binary system 0210 nano-technology Spectroscopy Powder diffraction Phase diagram Solid solution |
| Zdroj: | Journal of Applied Crystallography. 49:64-68 |
| ISSN: | 1600-5767 |
| DOI: | 10.1107/s1600576715022062 |
| Popis: | The phase relations in the (1−x)Nd2Fe14B–xSm2Fe14B system over the whole concentration range have been studied by means of X-ray powder diffraction (XRD), differential thermal analysis (DTA) and scanning electron microscopy with energy-dispersive X-ray spectroscopy. Crystal structure parameters for all studied compositions of (Nd1−xSmx)2Fe14B have been determined by full-profile Rietveld refinements. These results revealed that all intermediate alloys of (Nd1−xSmx)2Fe14B are similar to the end member of the investigated system, Nd2Fe14B, with a tetragonal structure (space groupP42/mnm). The formation of continuous solid solutions has been found in this system. The normalized lattice parameters and unit-cell volumes of (Nd1−xSmx)2Fe14B solid solutions decrease linearly with increasing Sm content. The DTA measurements show that the melting temperature of (Nd1−xSmx)2Fe14B increases linearly with increasing Sm content and no metastable phases were detected. Based on the DTA data and XRD results, a tentative phase diagram for the pseudo-binary system Nd2Fe14B–Sm2Fe14B has been constructed. |
| Databáze: | OpenAIRE |
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