Title :
Processing of Terfenol-D alloy based magnetostrictive composites by dynamic compaction
Author :
Guruswamy, Sivaraman ; Loveless, Michael R. ; Srisukhumbowornchai, Nakorn ; McCarter, Michael K. ; Teter, Joseph P.
Author_Institution :
Dept. of Metall. Eng., Utah Univ., Salt Lake City, UT, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
Composites of Terfenol-D with metal binders were produced by explosive compaction. Compacts produced from powders prepared this way had a soft phase and intimate contact and bonding between particles are achieved. Ms/volume follows the expected trend based on the separate Ms/volume values of the constituents added. Magnetostriction of compacts made from mixture of Cu coated terfenol-D powder and Cu powder at a compressive stress of about 18 MPa were 110×10-6 and 195× 10-6 prior to and after stress relief anneal at 350°C. This value is about 18% of that obtained with Terfenol-D. Magnetic alignment of the powder during compaction can increase this to levels obtained in Terfenol-D-polymer composites. These composites had Young´s moduli values in the range of 33-36 GPa and were strong and tough enough to withstand machining operation
Keywords :
Young´s modulus; annealing; densification; dysprosium alloys; ferromagnetic materials; iron alloys; magnetic particles; magnetostriction; materials preparation; particle reinforced composites; terbium alloys; 350 C; Cu coated terfenol-D powder; Cu powder; DyTbFe2; Ms/volume value; Terfenol-D alloy based magnetostrictive composites; Youngs moduli; bonding; compressive stress; dynamic compaction; explosive compaction; machining operation; magnetic alignment; magnetostriction; metal binders; particles; powders; processing; soft phase; stress relief anneal; Amorphous magnetic materials; Compaction; Compressive stress; Copper; Explosives; Iron; Magnetic separation; Magnetostriction; Powders; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
