110 AND 112 ORIENTED GROWTH OF Tb-Dy-Fe GIANT MAGNETOSTRICTIVE ALLOY

Acta Metall Sin

2004, Vol. 40

Issue (4): 373-377 DOI:

Research Articles

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110 AND 112 ORIENTED GROWTH OF Tb-Dy-Fe GIANT MAGNETOSTRICTIVE ALLOY

JIANG Chengbao; ZHAO Yan; XU Huibin

School of Materials Science and Engineering; Beijing University of Aeronautics and Astronautics; Beijing 100083

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JIANG Chengbao; ZHAO Yan; XU Huibin. 110 AND 112 ORIENTED GROWTH OF Tb-Dy-Fe GIANT MAGNETOSTRICTIVE ALLOY. Acta Metall Sin, 2004, 40(4): 373-377 .

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Abstract The directionally solidified Tb--Dy--Fe magnetostrictive alloys with <110> orientation were prepared in a velocity range from 30 to 720 mm/h, and the solidified morphologies change from planar, cellular to dendritic with increasing growth velocity. An obvious magnetostriction jump effect was observed in the sample with high growth velocity (>120 mm/h). Two kinds of twin growth mode, single--{111} and two--{111}--twin system were observed. The measured magnetostrictions of the samples are basically consistent with the calculated values by the above two twin growth mechanisms. As a comparison, the magnetostriction of <112> oriented crystals prepared with v=900 mm/h is corresponding to the <110> oriented crystals prepared with high growth velocities.

Key words: Tb--Dy--Fe alloy giant magnetostriction directional solidification

Received: 16 April 2003

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