Study on the melt-textured technique in a magnetic field for giant magnetostrictive materials R–Fe alloy
✍ Scribed by Peiran Deng; Jianguo Li; Zhenming Xu
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 540 KB
- Volume
- 419
- Category
- Article
- ISSN
- 0921-5093
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✦ Synopsis
The melt-textured technique in a magnetic field for giant magnetostrictive materials TbFe x and Tb 0.3 Dy 0.7 Fe x (1.9 x 2) alloy was investigated. The cooling rate, melt temperature, and the chemical composition were found to influence the texture formation along the easy magnetic axis during crystallization in a field. The experiments showed that the 1 1 1 orientation of Tb 0.3 Dy 0.7 Fe 1.9 and TbFe 1.9 alloy was dominant in the samples when those alloys were solidified at a cooling rate of less than 0.8 • C/min from a temperature slightly above their melting point, respectively, while in a magnetic field of above 100 mT. However, with the Fe concentration increasing from x = 1.93, excessive RFe 3 phases precipitate in the melt and degrade the orientation degree of the sample during the slow solidification . Therefore the chemical composition of Tb 0.3 Dy 0.7 Fe x and TbFe x alloy should be controlled within 1.90 x 1.93 for better orientation and comprehensive performance.