Development of MSMA-Driven Actuators based on Standardization of Single Crystal Growth, Treatment and Quality Assessment

近十年来，国内外对Ni-Mn-Ga单晶的磁形状记忆效应进行了深入的研究。今天，这种现象的许多方面都已被记录在案。尽管如此，发表的结果几乎没有一致性，因为晶体生长和处理的文献通常很差，因此晶体不同。对于商业应用来说，MSM驱动行为的可靠性和重复性是非常重要的。在晶体生长、热处理、培训程序和质量评估标准化的基础上，HMI和IWF将在搬运技术领域开发执行机构部件。由于可获得高质量的Ni-Mn-Ga晶体，这类磁性形状记忆合金(MSMA)将在该项目的第一部分中发挥关键作用。然而，HMI最近开发的新的晶体生长技术SLARE将被采用并微调到其他有希望的合金，如Co-Ni-Ga和Cu-Mn-Ga。结合结构、磁性和机械特性对寿命和疲劳行为进行研究，将形成质量评估工具。在这些基础研究的基础上，将开发和表征高效的执行器、操纵装置和基于其的控制概念。最后，将在实际运行中测试这些设备的长期运行行为。

During the last decade the magnetic shape memory (MSM) effect of Ni-Mn-Ga single crystals was intensely studied by numerous groups all over the world. Today many aspects of this phenomenon have been documented. Still, there is little consistency in the published results, since the documentation of crystal growth and treatments is generally poor and therefore the crystals differ. For commercial applications reliability and repeatability of the MSM actuating behavior are significant. Based on the standardization of crystal growth, thermal treatment, training procedures and quality assessment the HMI and the IWF will develop actuator components in the field of handling technologies. Because of the availability of high quality Ni-Mn-Ga crystals, this class of magnetic shape memory alloys (MSMA) will play the key role within the first part of this project. Nevertheless, the new crystal growth technique SLARE , recently developed at HMI, will be adopted and finetuned for other promising alloys like Co-Ni-Ga and Cu-Mn-Ga in parallel. The study of life-time and fatigue behavior in conjunction with structural, magnetical and mechanical characterizations will result in quality assessment tools. In consideration of these fundamental studies efficient actuators, handling devices and control concepts based thereon will be developed and characterized. Finally the long-run behavior of theses devices will be tested in real operation.