Equipment: Acquistion of Advanced Rheological System

DMI-9800237德国国家科学基金会在该计划中提供的资金将用于购买研究聚合物粉末混合物的最先进的流变学测试系统，包括带有双螺杆挤出附件的扭矩流变仪。该设备将用于粉末注射成型、焊膏配方、直接金属注射成型以及无压和离心成型等领域的材料开发。在所有这些应用中，了解金属或陶瓷粉末与粘性流体的相互作用是至关重要的。该设备将用于原料流变性的基础研究以及粘度、屈服强度、相分离、混合动力学、剪切变稀和剪切增稠等许多现象的量化。双螺杆附件允许收集与聚合物/粉末系统的连续混合相关的基本数据，这是一个知之甚少的领域。这是一台多用户设备，是对聚合物研究现有能力的补充。这些设备将被粉末冶金实验室的许多本科生和研究生高度利用，他们正在进行颗粒材料研究，这是他们教育计划的一部分。它将用于实验室内的演示和目前正在实验室研究的许多活跃的研究计划，从而显著提高对粉末加载系统的流变行为的当前知识。

DMI-9800237 German The funds provided by the National Science Foundation in this program will be used to purchase a state-of-the-art rheological testing system for the study of polymer-powder mixtures, consisting of a torque rheometer with a twin-screw extrusion attachment. This equipment will be used in the development of materials in areas such as powder injection molding, solder paste formulation, direct metal injection molding, and pressureless and centrifugal forming. It is crucial to understand the interaction of metal or ceramic powder with a viscous fluid in all of these applications,. This equipment will allow the fundamental study of feedstock rheology and quantification of viscosity, yield strength, phase separation, mixing kinetics, the characterization of shear thinning and shear thickening, and many other phenomenon. The twin screw attachment permits the collection of fundamental data relevant to the continuous mixing of polymer/powder systems, an area which is poorly understood. This is a multi-user piece of equipment, which complements existing capabilities in polymer research. The equipment will be highly utilized by the many undergraduate and graduate students in the P/M Lab who are conducting research in particulate materials as part of their educational programs. It will be used for in-lab demonstrations and the many active research programs currently being studied in the lab, thereby significantly advancing the current knowledge of the rheological behavior of powder-loaded systems.