STTR Phase I: Biomimetically Engineered Ceramics

STTR 第一阶段：仿生工程陶瓷

• 批准号: 1010312
• 负责人: Zachary Wing
• 金额: $ 15万
• 依托单位: Advanced Ceramics Manufacturing
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1010312&HistoricalAwards=false
• 关键词: STTR; Phase; Biomimetically; Engineered; Ceramics

This Small Business Technology Transfer Phase I project seeks to develop biomimetic structures in engineering ceramics based on the damage-tolerant sea shell micro-architecture. Poor damage tolerance of engineering ceramics leads to catastrophic failure modes under stress, which restricts their structural utility. In extreme conditions, ceramics generally function only as a thermal or chemical barrier. Gains in damage tolerance have been made in select ceramics via transformation toughening, acicular grains, and engineered architectures such as Fibrous Monoliths (FMs). Significant further gains can be achieved by mimicking the micro-architecture of the Strombus Gigas (sea shell). The multiscale architecture of the sea shell will be replicated in a model engineering ceramic system comprised of silicon nitride and boron nitride by borrowing and significantly building on the techniques used in making FMs, including thermoplastic deformation and assembly. Modeling of crack propagation through these complex architectures will be performed to help guide the development of the process. The microstructural, mechanical, and thermal properties of the engineered ceramics will be characterized. This research will establish the viability of the proposed thermoplastic deformation/assembly techniques to engineer a third-order biomimetic ceramic material which is expected to have a work-of-fracture more than twice as large as a comparable FM.The broader impact/commercial potential of this project will be the development of highly damage-tolerant ceramics that will increase their utility in engineering applications and validate bio-inspired materials engineering. The biomimetic ceramics will improve on the damage tolerance of existing ceramic systems by a significant margin and therefore will be of great interest to many industries: manufacturing, military/aerospace, and medical. No comparable technology exists which combines the benefits of ceramics (low density, thermal stability, high hardness) without their disadvantages (poor damage tolerance). Ceramic- and metal-matrix composites offer better reliability than bulk ceramics, but are expensive and often fall short of design requirements. Ultra tough ceramics will produce better performance in medical implants, maintain American manufacturing leadership, and promote advanced vehicle technology. By creating materials which can meet both thermal and structural requirements, this technology will create more multi-functional ceramics. Additionally, this project will lead to a better understanding of crack propagation through damage-tolerant hierarchical structures. Finally, the project will involve undergraduate and graduate students at Villanova University, and key results of the research will be disseminated in multidisciplinary conferences and journals.

这个小型企业技术转移阶段I项目旨在基于易受伤害的贝壳微体系结构来开发工程陶瓷中的仿生结构。工程陶瓷的损害耐受性不佳会导致压力下的灾难性故障模式，从而限制了其结构性效用。 在极端条件下，陶瓷通常仅充当热或化学屏障。 通过变形，无晶粒和工程结构（例如纤维巨石（FMS）），在某些陶瓷中的破坏耐受性增长。 通过模仿Strombus Gigas（Sea Shell）的微体系结构，可以实现巨大的收益。 海壳的多尺度结构将在模型工程陶瓷系统中复制，该系统由氮化硅和硝化硅组成，并通过借贷并在制造FMS（包括热塑性变形和组装）中使用的技术进行大量构建。 通过这些复杂的体系结构进行裂纹传播的建模将有助于指导过程的开发。工程陶瓷的微观结构，机械和热性能将被表征。这项研究将确定所提出的热塑性变形/装配技术的生存能力，以设计三阶仿生陶瓷材料，预计将具有两倍以上的骨折功能，其大于相当的Fm。该项目的更广泛的影响/商业潜力将开发出高度损坏的耐受性陶器的发动机，并会增加材料的应用程序，并在其介绍式的应用程序中进行介绍。 仿生陶瓷将通过大幅度的利润来提高现有陶瓷系统的损害耐受性，因此许多行业将引起人们的极大兴趣：制造业，军事/航空航天和医疗。 不存在可比较的技术，可以结合陶瓷的好处（低密度，热稳定性，高硬度），而没有缺点（损害耐受性差）。 陶瓷和金属矩阵复合材料比散装陶瓷具有更好的可靠性，但价格昂贵，而且通常不满意。 超强的陶瓷将在医疗植入物中产生更好的性能，维持美国制造业领导力并促进先进的车辆技术。通过创建可以满足热需求和结构要求的材料，该技术将创建更多的多功能陶瓷。 此外，该项目将通过耐受耐受的层次结构更好地理解裂纹传播。 最后，该项目将涉及维拉诺瓦大学的本科生和研究生，并将在多学科会议和期刊中传播这项研究的关键结果。