Equipment: Acquistion of Advanced Rheological System

德国国家科学基金会在该项目中提供的资金将用于购买最先进的流变测试系统，用于研究聚合物-粉末混合物，该系统由带双螺杆挤出附件的扭矩流变仪组成。 该设备将用于粉末注射成型、焊锡膏配方、直接金属注射成型、无压成型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至关重要。 该设备将允许对原料流变学和粘度、屈服强度、相分离、混合动力学、剪切稀化和剪切增稠的表征以及许多其他现象进行定量的基础研究。 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。 这是一种多用户设备，补充了聚合物研究的现有能力。该设备将被P/M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的研究，作为他们教育计划的一部分。 它将用于实验室演示和目前正在实验室研究的许多积极的研究计划，从而显着推进目前的知识的流变行为的粉末加载系统。

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.