Atomic Scale to Micro Scale Understanding of Low Temperature Degradation Mechanism in Zirconia-Based Ceramics

从原子尺度到微观尺度理解氧化锆基陶瓷的低温降解机制

基本信息

批准号：
2114595
负责人：
Baishakhi Mazumder
金额：
$ 51.66万
依托单位：
SUNY at Buffalo
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-07-15 至 2025-06-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2114595&HistoricalAwards=false
关键词：
Atomic Scale Micro Understanding Low

项目摘要

NON-TECHNICAL DESCRIPTION: Zirconia-based ceramics such as yttria-stabilized tetragonal zirconia possess a unique combination of advantageous mechanical, electrical, and chemical properties as well as biocompatibility, which has allowed for a wide variety of applications (orthopedics and dental implants, thermal barrier coatings for turbine engines, oxygen sensors, and solid oxide fuel cell electrolytes). However, a key issue remains in these material systems, namely the occurrence of phase transformation when a stimulus (e.g., low temperature) is applied that degrades the mechanical properties and stability of this material system. Although zirconia-based ceramics are one of the most studied ceramic systems, there is a lack of understanding in terms of the mechanism causing this low temperature degradation. This project aims to close this gap by using integrated multiscale microscopy techniques and material informatics to establish a quantitative understanding of the phase transformation. The proposed methodology, acquired learning, and data analysis methods create a pathway for the optimization of materials and their performance. This is critical for many fields such as energy, structural, and biomedical applications . For example, preventing early-onset of low temperature degradation in zirconia-based ceramics widely used in the fabrication of dental crowns and fixed dental prostheses will extend the longevity of ceramic dental implants. The educational and workforce development activities impact graduate, undergraduate, and K-12 students, and the community to enhance the global competitiveness of the national engineers and scientists. New knowledge is disseminated in an education toolkit designed to explain the principles of atomic scale microscopy. Tutorials at the Materials Research Society and Microscopy and Microanalysis meetings stand to impact students at various levels. TECHNICAL DETAILS: The research project seeks to gain fundamental understandings of the mechanism of aging-induced low temperature degradation in zirconia-based ceramics. The novel approach of employing advanced microscopy techniques coupled with microstructure informatics provides insights into the local chemistry, grain boundary evolution and oxygen vacancy generation with varying dopant concentration and processing conditions stands to increase the understanding of ceramic systems beyond conventional characterization methods and provide advanced correlation between structural and material performance. The proposed methodology, acquired learning, and data analysis methods generate a pathway for the optimization of materials and their performance. Graduate and undergraduate students are mentored and trained in this critically important area of ceramic science and technology. Minority K-12 students from South Park High School are inspired and trained through summer research projects.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.

非技术描述：氧化钇稳定的四方氧化锆等氧化锆基陶瓷具有独特的机械、电气和化学性能以及生物相容性组合，可实现广泛的应用（骨科和牙科植入物、热学涡轮发动机、氧传感器和固体氧化物燃料电池电解质的阻隔涂层）。然而，这些材料系统中仍然存在一个关键问题，即当施加刺激（例如低温）时会发生相变，从而降低该材料系统的机械性能和稳定性。尽管氧化锆基陶瓷是研究最多的陶瓷系统之一，但人们对导致这种低温降解的机制缺乏了解。该项目旨在通过使用集成的多尺度显微镜技术和材料信息学来建立对相变的定量理解来缩小这一差距。所提出的方法、后天学习和数据分析方法为优化材料及其性能创造了一条途径。这对于能源、结构和生物医学应用等许多领域至关重要。例如，防止广泛用于制造牙冠和固定假牙的氧化锆基陶瓷的早期低温降解将延长陶瓷牙种植体的使用寿命。教育和劳动力发展活动影响研究生、本科生和 K-12 学生以及社区，以提高国家工程师和科学家的全球竞争力。新知识通过旨在解释原子尺度显微镜原理的教育工具包进行传播。材料研究协会的教程以及显微镜和微量分析会议将对各个级别的学生产生影响。技术细节：该研究项目旨在对氧化锆基陶瓷中老化引起的低温降解的机制有基本的了解。采用先进显微镜技术与微观结构信息学相结合的新方法，可以深入了解不同掺杂剂浓度和加工条件下的局部化学、晶界演化和氧空位的产生，从而增强对陶瓷系统的理解，超越传统的表征方法，并提供陶瓷系统之间的高级关联。结构和材料性能。所提出的方法、后天学习和数据分析方法为优化材料及其性能提供了一条途径。研究生和本科生在陶瓷科学和技术的这一至关重要的领域接受指导和培训。南方公园高中的少数族裔 K-12 学生通过夏季研究项目受到启发和培训。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。