Collaborative Research: DMREF: Topologically Designed and Resilient Ultrahigh Temperature Ceramics

合作研究：DMREF：拓扑设计和弹性超高温陶瓷

• 批准号: 2323458
• 负责人: Christopher Weinberger
• 金额: $ 59万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-10-01 至 2027-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2323458&HistoricalAwards=false
• 关键词: Collaborative; Research; DMREF; Topologically; Designed

Ultrahigh temperature ceramics are a class of materials with exceptionally high melting temperatures. Consequently, they hold great promise for extreme environment applications that include hypersonic flight, nuclear fusion reactors, and concentrated solar power. However, they are brittle at low temperatures, which negatively impacts functionality. Conversely, these materials deform too much at ultrahigh temperatures. Usually, one of these properties can be improved at the expense of the other, making optimization difficult. This Designing Materials to Revolutionize and Engineer our Future (DMREF) project will develop a new method to simultaneously improve both the low temperature and high temperature properties of these materials by devising a means to design and manufacture specific crystal structures and unique microstructures. As part of this research effort, the next generation of scientists and engineers will be trained in a cross-disciplinary manner as they work together to bridge different disciplines. This education will be expanded through an active high school and undergraduate summer program that identifies underserved demographics in STEM. Additionally, this project will educate secondary school teachers about materials science, and specifically ceramics, giving them the toolsets to integrate such information into physics, chemistry, and physical science courses dramatically broadening the impact of the science generated.The overarching goal of this project is to design ultrahigh temperature ceramics that are both resistant to fracture at low temperatures and resilient against creep at high temperature. This will be achieved by designing the ceramic from a bottom-up approach that utilizes the materials’ own natural length scales and chemistry to stabilize low symmetry crystal structures whose elongated shapes fit together creating an interlocked material microstructure. A combination of computational tools, including first principles and machine learning, will be integrated into experimental methods that directly synthesize customized powder morphologies where the structure and property performance is characterized. Through this iterative loop of interactions and outcomes, specific metal and nonmetal species will be identified and designed to promote desired phases with interlocking morphologies. By simultaneously improving toughness and deformation resistance in our ultrahigh temperature ceramics, this research will enable the advancement of technologies for use at extreme environments, while providing unique training for students in a multidisciplinary educational environment.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

超高温度陶瓷是一类材料，具有异常高的熔融温度。因此，它们对包括高超音速飞行，核融合反应堆和集中太阳能在内的极端环境应用具有巨大的希望。但是，它们在低温下是脆弱的，这会对功能产生负面影响。相反，这些材料在超高温度下变形过多。通常，这些属性之一可以以牺牲另一个属性为代价，从而使优化变得困难。这种设计材料彻底改变和设计我们的未来（DMREF）项目将开发一种新方法，通过设计一种方法来设计和制造特定的水晶结构和独特的微观结构，以轻松提高这些材料的低温和高温性能。作为这项研究工作的一部分，下一代的科学家和工程师将在桥梁上共同桥接不同学科的过程中以跨学科的方式进行培训。该教育将通过活跃的高中和本科夏季计划扩展，该计划确定了STEM中服务不足的人口统计信息。此外，该项目将教育中学教师有关材料科学，尤其是陶瓷的教育，为他们提供了将这种信息集成到物理，化学和物理科学课程中的工具集，这极大地扩大了该项目所产生的科学的影响。该项目的总体目标是确定在低温和耐高温和耐高温和耐药性耐高温和耐高温下的超高陶瓷。这将通过设计从自下而上的方法设计陶瓷来实现，该方法利用材料自然的长度尺度和化学反应来稳定低对称性晶体结构，其细长形状将其伸长在一起形成相互关联的材料微结构。包括第一原理和机器学习在内的计算工具的组合将集成到实验方法中，这些方法直接合成定制的粉末形态，其中结构和属性性能的表征。通过这种相互作用和结果的迭代环，将确定并设计特定的金属和非金属物种，以促进具有互锁形态的所需相。通过简单地在我们的超高温度陶瓷中改善韧性和变形抗性，这项研究将使在极端环境中使用技术的进步，同时在多学科教育环境中为学生提供独特的培训。该奖项反映了NSF的法规任务，并认为通过基金会的知识优点和广泛的critia criperia crigitia crigitia crigitia cripitia criperia cripitia criperia criperia cripitia criperia均被认为是宝贵的。