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

经典的磁性混合材料包含软磁或硬磁颗粒。因此，它们显示出主动磁流变效应或在硬磁颗粒磁化后表现出被动磁流变性质。在研究协会内，在弹性体基质中的硬磁和软磁颗粒的混合物预计将提供主动和被动磁流变性能的组合。 在这种情况下，它将是研究协会的中心目标，合成量身定制的磁性混合材料的传感器应用的基础上详细的微观理解的材料特性。在这里描述的子项目中，将对磁性混合材料的磁场驱动特性进行系统的实验研究。经典的弹性磁性混合材料以及具有复杂成分的新型材料将成为工作计划的重点。使用不同的方法和仪器的机械加载实验将与静态磁性能的调查相结合。 所获得的数据将作为材料性能模拟的参考，并将提供理论预测的基础，以及为传感器的设计，使用这种新型的磁性杂化材料，我们将评估和表征的粉末成分，形态和浓度的影响的交联过程，以及对复合材料的宏观行为。此外，我们将改进现有的实验技术和方法的磁性混合材料的磁力表征。因此，将使用各种类型的仪器进行实验，包括一些以前从未用于此类材料的仪器。 各种实验方法的组合旨在提供关于新的磁性混合材料的磁场诱导粘弹性性质的准确和准确的信息。除了表征具有复杂组成的新型复合材料和测试新的实验方法之外，对常规样品的测量将有助于理解这种材料，这仍然是不全面的或没有歧义的。数据的正确解释将使用微观结构表征和理论分析来完成，这将由其他工作组提供，最后，这种广义的信息将有助于预测某些材料特性，这可以通过材料组成的相应变化来实现。

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.