Crystallite Size and Magnetic Properties of HDDR Powders Obtained from PrFeCoBNb Alloys
| Autor: | Hidetoshi Takiishi, S.C. Silva, Rubens Nunes de Faria Jr., José Hélio Duvaizem |
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| Rok vydání: | 2010 |
| Předmět: |
Diffraction
Materials science Scanning electron microscope Praseodymium Mechanical Engineering Alloy Analytical chemistry chemistry.chemical_element engineering.material Condensed Matter Physics Crystallography chemistry Mechanics of Materials Desorption Phase (matter) engineering General Materials Science Magnetic phase Crystallite |
| Zdroj: | Materials Science Forum. :308-313 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.660-661.308 |
| Popis: | The first goal of this work involved the study of HDDR powders obtained from annealed alloys with the general formula: PrxFe77.9-xCo16B6Nb0.1 (x = 12; 12.5; 13; 13.5 and 14). The alloys were processed at desorption / recombination temperature of 840°C. The highest magnetic properties were obtained with 13.5 at. % Pr (Br= 1000mT and µ0iHc= 890mT). The alloy with a minimum praseodymium content (12 at. %) exhibited the lowest magnetic properties (Br= 350mT e iHc= 120mT). The second aim of the work involved the characterization of HDDR powders using X-ray diffraction for phase quantification and mean crystallite sizes determination of the hard magnetic phase. The processed powders were characterized by scanning electron microscopy (SEM). |
| Databáze: | OpenAIRE |
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