<報文>Ti-Ni熱エンジン駆動素子の形状記憶特性

概要

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The shape memory properties were investigated using Ti-50.3 at % Ni and Ti-51 at % Ni coils as the driving element in Ti-Ni shape memory heat engine. The shape recovery forces in the temperature range from 293 to 348K were measured under constant deflection. The results are as follows. (1) In Ti-50.3 at % Ni coil, the shape recovery force and the thermal hysteresis by heating and cooling increased with increase of strain. In the range of low strain, the shape recovery force increased with increase of temperature. (2) In Ti-51 at % Ni coil, the shape recovery forces were smaller than those of Ti-50.3 at % Ni coil. The shape recovery forces increased with increase of strain. In the range of low strain, there was little thermal hysteresis in the shape recovery force vs. temperature curves. This force was constant above 323 K by heat-treatment at 773 K for 1.8 ks. (3) Ti-51 at % Ni coil is useful for the energy converter of low quality energy sources at low temperatures.heat engineshape memory allyTiNishape recovery force
東北大学の論文
1988-03-25