ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
Technical importance of multi-ferroic approach for designing advancedmulti-functional actuator/sensors based on a mutual coupling effect between ferroic materialelements is pointed out for intelligent/smart technology. Two types of multi-ferroicactuator/sensor devices. i.e. (1) magnetically driven composite actuator and (2)multi-functional surface acoustic wave (SAW) sensor by MEMS are presented. First, alarge-scale robust composite actuator is the composite structure which is reinforced by thesuperelastic fiber or lamellar of shape memory alloys (TiNi) in the ferromagnetic metal (Ni)matrix. This multi-ferroic composite can be driven with high speed as well as considerablyenhanced strain by applying a wireless magnetic field. Secondarily, multi-functionallydesigned, multi-ferroic senor device using surface acoustic wave (SAW) is introduced. On thesurface part between IDTs, environmentally active material films such as SMA, FSMA,magnetostrictive alloy etc. are formed by magnetron-sputtering. Various environmentalsensing parameters i.e. temperature, magnetic field strength, stress, loading hysteresis andinternal damage etc. can be evaluated nondestructively from the signal analysis of amplitudeand phase change of SAW. Consequently, these results show the promising new types ofmulti-functional composite actuator and sensor based on multi-ferroic effect
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.54.187.pdf
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