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Reaction of Terfenol-D melts with SiO2 crucibles

✍ Scribed by Young-dong Kwon; Oh-yeoul Kwon; Min-chul Kim; Dang-moon Wee

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 255 KB
Volume: 129
Category: Article
ISSN: 0921-5107
DOI: 10.1016/j.mseb.2005.12.009

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✦ Synopsis

The interaction between Terfenol-D (Tb x Dy 1-x Fe y (0.27 ≤ x ≤ 0.30, y ≤ 2)) melts and quartz crucibles has been studied. A rare earth silicide was formed next to a rare earth oxide on SiO 2 substrate and a surface layer of rare earth oxide appeared on top of the silicide layer. The reaction was controlled by diffusion with an activation energy E a = 1.59 eV. The effect of Si contamination on the magneto-elastic property was evaluated. Maximum mangnetostriction of Terfenol-D decreased by 300 ppm while Si addition increased up to 1.0 at.%.

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