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The aim of the present work is to fabricate and to research microgrippers (microtweezers) on the basis of the two-way shape memory effect. Ti50Ni25Cu25 alloy (at.%) produced by melt-spinning technique in the form of layered amorphous-crystalline ribbons at around 40 mu m of thickness was used as the base material. The obtained structural composites were capable of executing reversible bending deformations in a heating/cooling cycle. A series of microtweezers with the gap adjustable in the range from 5 to 120 mu m was fabricated. The width of the gripping parts composed was 400-500 mu m and their length was from 650 to 1300 mu m depending on the gap value. Optical and scanning electron microscopes were used to monitor the operation of the tweezers. It has been revealed that the response speed of the microgrippers essentially depends on the control temperature mode. The optimum control parameters provide the response time about 1 s by the operation both in the environment and in vacuum. The complete process of manipulating (gripping-holding-moving-releasing) the carbon fibers at the diameter 10 to 20 mu m with using the fabricated device was demonstrated.

Development of Micromechanical Device on the Base of Two-Way Shape Memory Alloy Ribbon