Experimental study of magnetic field driven properties of magnetic hybrid materials with complex internal interactions

具有复杂内部相互作用的磁性杂化材料磁场驱动特性的实验研究

• 批准号: 436990233
• 负责人: Dr. Dmitry Borin
• 金额: --
• 依托单位: Department of Mathematical Physics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/436990233?language=en
• 关键词: Experimental; study; magnetic; field; driven

Classic magnetic hybrid materials contain either magnetically soft or magnetically hard particles. Accordingly, they either have an active magnetorheological effect or are provided with passive magnetorheological properties through the premagnetisation of the magnetically hard particles. Within this research network of Russian and German working groups we combine active and passive magnetorheological properties by mixing magnetically hard and magnetic soft particles in an elastomeric matrix. The aim of the network is to synthesize corresponding materials on the basis of a detailed microscopic understanding, tailor-made for sensory applications. Accordingly, the network is divided into six projects, of which the three projects applied for within the framework of DFG funding are summarised in this package proposal. The Borin working group project deals with the magnetorheological characterization of magnetic hybrid materials, the Odenbach working group project provides microstructural characterization and information on the interparticle interaction of magnetic particles via FORC measurements, and the Becker working group project uses magnetic hybrid materials for the design of novel mechanical sensors with adjustable sensitivity. These three projects are accompanied by three projects of Russian working groups funded by the RFFI. One of these projects - the Stepanov group project - deals with the synthesis of magnetic hybrid materials and thus provides the basis for sample preparation for all other projects. The two other Russian projects are concerned with the theoretical description of magnetic hybrid materials, using a scale spanning approach that extends from the microscopic scale, i.e. from the base of the scale of magnetic particles, to the macroscopic scale, i.e. to macroscopic material laws. For these projects, the material properties determined in the package application serve both as input data and as a benchmark for checking the theoretical results. In addition, the material laws provide the input data for the design of the sensory applications. In sum, we expect the project to provide detailed information on the relationships between microstructural changes and macroscopic properties of the magnetic hybrid materials, which should make it possible to predict the changes necessary to achieve certain material properties.

经典的磁性混合材料包含软磁或硬磁颗粒。因此，它们或者具有主动磁流变效应，或者通过硬磁颗粒的预磁化而具有被动磁流变特性。在这个俄罗斯和德国工作组的研究网络中，我们通过在弹性体基质中混合硬磁和软磁颗粒，将联合收割机主动和被动磁流变性能结合起来。该网络的目的是在详细的微观理解的基础上合成相应的材料，为感官应用量身定制。因此，该网络分为六个项目，其中三个项目在DFG资助框架内申请，在本一揽子提案中进行了总结。Borin工作组项目涉及磁性混合材料的磁流变特性，Odenbach工作组项目通过FORC测量提供磁性颗粒的微结构特性和颗粒间相互作用的信息，Becker工作组项目使用磁性混合材料设计具有可调灵敏度的新型机械传感器。伴随这三个项目的还有俄罗斯联邦金融研究所资助的三个俄罗斯工作组项目。其中一个项目-Stepanov小组项目-涉及磁性混合材料的合成，从而为所有其他项目的样品制备提供了基础。另外两个俄罗斯项目涉及磁性混合材料的理论描述，使用从微观尺度（即从磁性粒子尺度的基础）扩展到宏观尺度（即宏观材料定律）的尺度跨越方法。对于这些项目，在软件包应用程序中确定的材料属性既可作为输入数据，也可作为检查理论结果的基准。此外，材料定律为感官应用的设计提供了输入数据。总之，我们希望该项目提供有关磁性混合材料的微观结构变化和宏观特性之间关系的详细信息，这应该可以预测实现某些材料特性所需的变化。