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Abstract
Material Characteristics of thermoelastic shape memory alloy(SMA) have to be improved toward two times higher level so that SMAs can be applied to smart material/structure systems. For this purpose, the novel material processing technique, "Rapid-solidification, melt-spinning method" was used to control the crystal microstructures with fine columnar grains with strong texture. We succeeded in producing the rapid-solidified various kinds of SMA (TiNiCu, TiNiPd, NiAlMn, RuNb, RuTa systems) foils and fine fibers with sharper hysteresis and more ductility than those of bulk-materials. The thermo-mechanical properties of these SMAs were investigated systematically. Next, SMA bulk actuator material to get large recover force could be produced by adopting short time spark plasma sintering (SPS) method for rapid-solidified SMAs ribbons/fibers. Lastly, new concept for complex thermo-magneto actuator with capability of more rapid response speed was proposed. That was designed by combination super-elastic character of SMA with bias-magnetic force. These results are useful for develop the smarter materials and structure systems based on SMA technology.
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