CAREER: Hard and Tough Boron Rich Ceramic Laminates Designed to Contain Thermal Residual Stresses

非技术描述：该职业计划描述了一个综合的研究和教育项目，以开发硬而坚韧的碳化硼和硼化铝镁基层压板，并在单独的层中控制压缩和拉伸应力。这项研究产生的基础知识和理解之间的相互关系的处理，残余应力，和富硼多层陶瓷复合材料的机械行为。该项目将导致耐磨、耐损伤陶瓷的发展，其机械性能远远超过目前可用的非氧化物陶瓷。 该项目为机械，材料和航空航天工程专业的学生积极参与基于项目的学习提供了理想的基础。综合研究和教育活动包括推广到不同群体的初中和高中学生和研究机会和课程增强本科生。研究生参与研究，在技术会议上发表演讲，并指导本科生和高中生研究人员。特别努力吸引代表性不足的学生通过高中外展和本科研究组成部分在材料科学和工程的职业生涯。此外，学生将通过该项目与新的国际研究人员网络的合作，从全球研究机会中受益。最终，社会效益将随着新型可靠和坚固的系统和设备的开发而到来。技术优势：具有强界面的层压板提供高断裂韧性，提高耐磨性和损伤容限。因此，这些复合材料表现出改进的可靠性和耐久性。层合板的力学性能的提高是通过设计控制层间残余应力来实现的。建议的建模实验程序的目的是明确地表明，控制残余应力的概念，可以用来生产高性能陶瓷层压板。设计了具有可控残余应力的富硼多层陶瓷样品，并通过轧制和热压/热等静压进一步制备。此外，流延成型和放电等离子体烧结将用于层压板制造。研究结果在一个清晰的识别的微观结构参数，控制层压板中的残余应力。将测量机械性能如强度、硬度、耐磨性和断裂韧性，以确认层压材料的机械性能的增加。PI参加了她所在大学的桥梁暑期项目，以吸引聪明而有才华的学生进入工程领域。研究生和本科生有一个独特的机会成为一个尖端的，国际材料开发研究团队的一部分，并发表他们的成果。

NON-TECHNICAL DESCRIPTION: This CAREER program describes an integrated research and educational project to develop hard and tough boron carbide and aluminium magnesium boride based laminates with controlled compressive and tensile stresses in separate layers. The research produces fundamental knowledge and understanding of the interrelationships between processing, residual stresses, and mechanical behavior of boron rich multilayered ceramic composites. This project will lead to the development of wear resistant, damage-tolerant ceramics with enhanced mechanical properties far exceeding those of currently available non-oxide ceramics. The proposed project provides an ideal basis for mechanical, Materials and aerospace engineering students to actively participate in project-based learning. Integrated research and educational activities include outreach to a diverse group of middle and high school students and research opportunities and course enhancements for undergraduate students. Graduate students are involved in research, presentations at technical meetings, and mentor undergraduate and high school student researchers. Special efforts are made to attract underrepresented students to careers in materials science and engineering through the high school outreach and undergraduate research components. In addition, students will benefit from global research opportunities through the project's collaboration with a new network of international researchers. Ultimately, societal benefits will come with the development of novel reliable and robust systems and devices.TECHNICAL DETAILS: Laminates with strong interfaces provide high fracture toughness, increased wear resistance and damage tolerance. As a result, these composites exhibit improved reliability and durability. The enhancement of the mechanical performance of laminates is obtained through design of controlled residual stresses in separate layers. The proposed modeling-experimental program is designed to demonstrate unequivocally that the concept of controlled residual stresses can be employed to produce high performance ceramic laminates. Samples of boron rich multilayered ceramics with controlled residual stresses are designed and further manufactured by rolling and hot pressing/hot isostatic pressing. Additionally, tape casting and spark plasma sintering are to be used for the laminate manufacturing. The research results in a clear identification of the microstructural parameters that control residual stresses in laminates. Mechanical properties such as strength, hardness, wear resistance, and fracture toughness are to be measured to confirm the increase in the mechanical performance of the laminates. The PI takes part in a Bridges summer program at her university to attract bright and talented students to engineering. Graduate and undergraduate students have a unique opportunity to be a part of a cutting-edge, international materials development research team and to publish their results.