材料科学
铁磁性
合金
磁性形状记忆合金
形状记忆合金
钛合金
磁场
冶金
微观结构
磁铁
机器人
纳米技术
凝聚态物理
磁化
机械工程
磁畴
计算机科学
人工智能
量子力学
物理
工程类
作者
Jianran Lv,Hongyao Shen,Jianzhong Fu
标识
DOI:10.1002/adem.202001367
摘要
Ni–Ti alloys are widely applied in various fields due to their good biocompatibility and special shape memory function. To date, to make the Ni–Ti alloy ferromagnetic, the commonly used method is to add Fe or Ni particles to the Ni–Ti alloy. Within the knowledge, no reports have reported that the Ni–Ti alloys can possess ferromagnetism without adding magnetic particles. In the first half of this article, a process that can produce ferromagnetism in Ni–Ti alloys and explain the principle of the new process according to the Ni–Ti binary phase diagram is reported. On the other hand, magnetic micro‐robots have received widespread attention recent years and laser powder bed fusion (LPBF) technology makes it possible to fabricate Ni–Ti micro‐robots. The remainder of this article introduces a type of thermally responsive micro‐robot, which is fabricated by the LPBF technology and combined with this new Ni–Ti alloy phenomenon. Experiments are performed to confirm that Ni–Ti micro‐robots have the ability to transport cargo and target delivery under the control of an external magnetic field. The combination of this new Ni–Ti alloy phenomenon and LPBF technology can provide a new avenue for manufacturing magnetic micro‐robots.
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