| Autor: |
Chen, Christina H., Lee, Don, Liu, Sam, Walmer, Michael H., Yong Zhang, Hadjipanayis, George C. |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Magnetics; Jul2004 Part 2 of 2, Vol. 40 Issue 4, p2937-2939, 3p |
| Abstrakt: |
Fully dense nanocomposites of (Sm1-xGdx)2(Co1-yFey)2:17 phase + Co/Fe were obtained by hot pressing the amorphous powders at 740 °-760 °C. Amorphous powders were made by mechanical alloying. Up to 14 kOe of Coercivity was obtained for these Cu and Zr free nanocomposites. X-ray diffraction patterns confirm the status of amorphous powder and crystallized structure after annealing at 750-825 °C. Transmission electron microscopy image shows that the sizes of crystals were in the range of several nm to 100 nm. These fully dense nanocomposites have Curie temperatures higher than 900 °C and lower temperature coefficient of magnetization, which would make them ideal candidates for temperature compensated permanent magnets. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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