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

经典的磁杂化材料包含磁软或磁硬颗粒。因此，在磁性硬颗粒磁化后，它们表现出主动磁流变效应或被动磁流变特性。在研究协会中，在弹性体基质中混合磁性硬颗粒和磁性软颗粒有望提供主动和被动磁流变特性的组合。在这种情况下，研究协会的中心目标是基于对材料特性的详细微观理解，为传感器应用合成量身定制的磁性混合材料。在这里描述的子项目中，将进行磁性杂化材料磁场驱动特性的系统实验研究。经典的弹性磁杂化材料以及具有复杂成分的新型材料将是工作计划的重点。使用不同方法和仪器的机械载荷实验将与静态磁性能的研究相结合。所获得的数据将作为材料性能模拟的参考，并将为理论预测以及使用新型磁杂化材料的传感器设计提供基础。我们将评估和表征粉末组成、形貌和浓度对交联过程的影响，以及对复合材料宏观行为的影响。此外，我们将改进现有的磁杂化材料的磁力学表征的实验技术和方法。因此，实验将使用各种类型的仪器进行，包括一些以前从未用于这类材料的仪器。多种实验方法的结合，旨在为新型磁性杂化材料的磁场诱导粘弹性特性提供准确的信息。除了具有复杂成分的新型复合材料的表征和新实验方法的测试之外，对传统样品的测量将有助于理解这些材料，这仍然是不全面或没有歧义的。将使用其他工作组提供的微观结构表征和理论分析来对数据进行正确的解释，最后，这些广义信息将有助于预测某些材料特性，这可以通过材料成分的各自变化来实现。

Classical magnetic hybrid materials contain either magnetically soft or magnetically hard particles. Thus, they show either an active magnetorheological effect or exhibit passive magnetorheological properties after magnetization of the magnetically hard particles. Within the research association a mixture of magnetically hard and soft particles in an elastomeric matrix is expected to provide a combination of active and passive magnetorheological properties. In this context, it will be the central goal of the research association to synthesize tailored magnetic hybrid materials for sensor applications based on a detailed microscopic understanding of the material properties. Within the subproject described here a systematic experimental study of magnetic field driven properties of magnetic hybrid materials will be performed. Classical elastic magnetic hybrid materials as well as novel materials with a complex composition will be in focus of the working program. Experiments on mechanical loading using diverse methods and instrumentation will be combined with investigations of the static magnetic properties. The obtained data will serve as a reference for the simulation of the material properties and will provide the basis for theoretical predictions as well as for the design of sensors using the new kind of magnetic hybrid materials.We will evaluate and characterize the influence of the powder composition, morphology and concentration on the cross-linking process as well as on the resulting macroscopic behavior of the composites. Furthermore, we will improve the existing experimental techniques and methods for magnetomechanical characterization of magnetic hybrid materials. Therefore, experiments will be conducted using various types of instrumentation, including some that have never been used for this class of materials before. A combination of various experimental methods is intended to provide exact and accurate information on the magnetic field induced viscoelastic properties of the new magnetic hybrid materials. In addition to the characterization of the novel composite with complex composition and testing of new experimental methods, measurements on conventional samples will contribute to the understanding of such materials, which is still not comprehensive or without ambiguities. A correct interpretation of the data will be done using microstructural characterization and theoretical analysis, which will be provided by other working groups, and finally this generalized information will contribute to a prediction of certain material properties, which can be achieved by respective changes in composition of the material.