DMREF/Collaborative Research: Multi-Scale Fundamental Investigation of Sintering Anisotropy

这项设计材料以革命和工程我们的未来（DMREF）资助的重点是开发一种新的集成多尺度方法，该方法结合了考虑各向异性现象的烧结诱导变形过程的建模和实验。烧结诱导的各向异性，粉末加工的最基本的方面之一，是知之甚少，不能正确地预测现有的模型和方法。它在技术上也非常重要，因为许多粉末加工方法会引起各向异性。 该项目包括研究加工条件和各向异性微观结构-本构特性之间的复杂相互作用，这将为设计和优化具有可编程宏观特性和微观结构的先进陶瓷和金属系统的制造提供基础知识和新的实用方法。这项研究旨在建立一种新的方法来优化包括多层固体氧化物燃料电池在内的各种复杂材料系统的烧结。开发的概念可用于设计其他多层材料系统（例如传感器，致动器，太阳能电池封装）的处理或施加应力下的处理（例如热压，烧结锻造）。该项目还有助于加工方法的总体框架，这些方法通过实验验证的模拟得到增强，并显着加速新材料和工艺的开发。 来自两所大学的团队将与来自行业的合作者密切合作，不断测试和改进模拟方法。 Co-PI还将与桑迪亚国家实验室的研究人员合作开发多尺度模拟算法。 这个综合性的合作研究项目为华盛顿大学、西雅图大学和圣地亚哥州立大学的学生提供了一个独特的高质量学习机会。

This Designing Materials to Revolutionize and Engineer our Future (DMREF) grant is focused on the development of a new integrated multi-scale approach incorporating modeling and experimentation on sintering-induced deformation processes taking into account anisotropy phenomena. Sintering-induced anisotropy, one of the most fundamental aspects of powder processing, is poorly understood and cannot be predicted properly by the existing models and approaches. It is also technologically very important since many powder-processing approaches induce anisotropy. The project includes the study of the complex interplay between processing conditions and anisotropic microstructure-constitutive properties which will provide fundamental, basic knowledge and a novel practical approach to design and optimize the manufacturing of advanced ceramic and metal systems with programmable macroscopic characteristics and microstructure. This research intends to establish a new methodology to optimize the sintering of a broad range of complex material systems including multilayered solid oxide fuel cells. The developed concepts can be used to design the processing of other multilayered material systems (e.g. sensors, actuators, solar cell packaging) or processing under applied stresses (e.g. hot-pressing, sinter-forging). The project also contributes to the general framework of processing approaches which are enhanced by experimentally validated simulations and which significantly accelerate the development of new materials and processes. The teams from the two universities will work closely with collaborators from the industry to continuously test and refine the simulation approaches. Co-PIs will also collaborate with researchers from the Sandia National Laboratories in the development of the multi-scale simulation algorithms. This integrated, collaborative research program provides a unique high quality learning opportunity for students at the University of Washington, Seattle and at the San Diego State University.