Formation of TbCu7-type CeFe10Zr0.8 by rapid solidification
| Autor: | Chen Zhou, Jan F. Herbst, Frederick E. Pinkerton |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Annealing (metallurgy) Mechanical Engineering Metallurgy Metals and Alloys Crystal structure chemistry.chemical_compound Crystallography chemistry Mechanics of Materials Ternary compound Materials Chemistry Curie temperature Density functional theory Chemical stability Melt spinning Ingot |
| Zdroj: | Journal of Alloys and Compounds. 569:6-8 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2013.03.175 |
| Popis: | We report the discovery of a new ternary compound prepared by melt spinning induction melted ingot of nominal composition CeFe 11 Zr. The sample melt spun at v s = 25 m/s exhibits the hexagonal TbCu 7 -type structure of space group P6/mmm. Through fitting the experimental X-ray diffraction pattern by Rietveld method, we have successfully derived the crystal structure of the new compound melt spun at v s = 25 m/s to be CeFe 10 Zr 0.8 . Subsequent density function theory calculation fully supports the chemical stability of the new ternary compound. Annealing test showed that the melt spun CeFe 10 Zr 0.8 is stable up to 700 °C and annealing at higher temperature would cause it to decompose into hexagonal Ce 2 Fe 17 -type structure and ZrFe 2 . The Curie temperature measurement found that CeFe 10 Zr 0.8 boasts a T c = 181 °C, which is higher than the T c values of all known Ce–Fe binary compounds, and 30 °C higher than that of Ce 2 Fe 14 B. These interesting properties stimulate continued search for new Ce-based permanent magnets that could be a cost effective solution to engineering needs in the future. |
| Databáze: | OpenAIRE |
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