假弹性
形状记忆合金
材料科学
制作
大气温度范围
光电子学
极限抗拉强度
拉伸应变
复合材料
微观结构
马氏体
热力学
医学
替代医学
物理
病理
作者
Xiangyu Zhang,Haiyang Chen,Yurong Niu,Runguang Li,Tao Yin,Runqiu Lang,Chao Song,Lingyun Meng,Daoyong Cong,Shilei Li,Yandong Wang
摘要
We demonstrate perfect superelasticity and inherent two-way shape memory effect in Co49Ni21Ga30 microwires fabricated by a Taylor–Ulitovsky method. With the formation of an almost complete [001]A-oriented single crystal along the axis of the wire, the as-drawn microwire displays great superelastic behaviors with a large reversible tensile strain of >8% over an ultra-wide temperature window of 550 K (223–773 K). Simultaneously, an excellent intrinsic two-way shape memory effect with a considerably large strain output (∼6.3%) was also obtained in this Co49Ni21Ga30 microwire. After mechanical training, the two-way shape memory strain can reach up to 6.8% at a low operating temperature. With the combination of above extraordinary functional properties and the low cost of fabrication, the Co49Ni21Ga30 microwire holds a significant potential for applications in miniature sensing and self-actuating devices in the future.
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