| Autor: |
Tan Ping, Luo Jianjun, Li Zengfeng, Zhou Ji |
| Rok vydání: |
2006 |
| Předmět: |
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| Zdroj: |
Journal of Rare Earths. 24:314-317 |
| ISSN: |
1002-0721 |
| DOI: |
10.1016/s1002-0721(07)60389-5 |
| Popis: |
High performance magnets not only have high magnetic properties, but also have good homogeneity. The homogeneous of Nd 14.2 Dy x Al 0.8 Cu 0.1 B 6.2 Fe bal. bulk magnets was studied. The sizes of the samples produced by conventional sintering process were 53 × 50.5 × 25.3/40.2/50.4/61.0 mm. The magnetic character and microstructure of the samples were determined by NIM-10000H hysteresigraph, optical metaloscope, and SEM respectively. The results show that the H cj reduces with increasing C content at the same process parameters. And the H cj shows dependence not only on the ageing processing but also on the size of the bulk and loading capacity etc. The H cj increases with prolonging ageing time and the ageing time should be different with different size of the bulk. With the increase of the loading capacity, the H cj reduces promptly and is very inhomogeneous. The microstructure of the samples shows that the grain of the hard magnetic phase is finer and the neodymium-rich boundary is distributed homogeneously with prolonging ageing time. And so is the sample in a small amount of the bulks. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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