New elastomer–Terfenol-D magnetostrictive composites

✍ Scribed by C. Rodríguez; M. Rodriguez; I. Orue; J.L. Vilas; J.M. Barandiarán; M.L.F. Gubieda; L.M. Leon

• Book ID: 104092570
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 552 KB
• Volume: 149
• Category: Article
• ISSN: 0924-4247
• DOI: 10.1016/j.sna.2008.11.026

✦ Synopsis

Several composites, with outstanding magnetostrictive properties, have been synthesized combining a polyurethane elastomer with polycrystalline powders of Terfenol-D. A preferential orientation of the latter was obtained by curing the material in a magnetic field. The morphology of the polymeric matrix can be modified by changing the hard/soft segment ratio of the polyurethane. The influence of the morphology of the polymeric matrix on the composite response has been studied, by following the storage modulus, E , by DMTA technique. The magnetostrictive response has been studied as a function of the Terfenol-D particle size distribution, and the content of magnetostrictive particles in the composite. The highest response (about 1390 ppm) was obtained for a composite having polyurethane with a 1.5 hard to soft segment ratio, 50% weight of Terfenol-D of 212-300 m particle size, oriented in a magnetic field of 0.5 T.