Collaborative Research: Deformation and Damage Mechanisms in Ternary Carbides and Nitrides under Dynamic Conditions

合作研究：动态条件下三元碳化物和氮化物的变形和损伤机制

• 批准号: 1233887
• 负责人: Arun Shukla
• 金额: $ 15.01万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-15 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1233887&HistoricalAwards=false
• 关键词: Collaborative; Research; Deformation; Damage; Mechanisms

The research objective of this award is to investigate the mechanical response of a new class of nanolayered ceramics (MAX phases) and their solid solutions in extreme dynamic loading conditions through a combination of experimental approaches. MAX phases have attracted considerable attention as potential multifunctional materials for extreme environments since they combine some of the best attributes of ceramics and metals. Preliminary work on MAX phases suggests that new underlying physical mechanisms that can make ceramic materials resistant to dynamic loadings are yet to be discovered and fully explored. Studies conducted under this award will elucidate the physical mechanisms of deformation and damage in the MAX phases, and address fundamental questions regarding the constitutive behavior of the MAX phases under dynamic loading conditions as a function of temperature and to what extent our understanding of deformation and failure mechanisms of the MAX phases in quasi-static conditions can be extended to the extremely high deformation rates. From the technological point of view, successful completion of this project will result in a deeper understanding of the connections between composition, structure and mechanical properties in this novel class of materials for extreme service conditions, enabling further developments in power generation, hypersonic and orbital re-entry flights, ballistic protection, etc. The educational and outreach plan focus on a series of activities, including: building a strong integrated research, educational and outreach collaboration between Texas A&M and University of Rhode Island focused on mechanical behavior of novel ceramics under extreme loading conditions; mentoring and training the next generation of experts in the areas of experimental mechanics and materials science of ceramics materials; and linking undergraduate and graduate students? research experiences to their education through their close involvement in research during coursework, research projects, and thesis research.

该奖项的研究目标是通过结合实验方法来研究一类新的纳米层状陶瓷(MAX相)及其固溶体在极端动态加载条件下的机械响应。由于MAX相结合了陶瓷和金属的一些最好的属性，因此作为一种潜在的多功能材料在极端环境中引起了相当大的关注。关于MAX相的初步工作表明，可以使陶瓷材料抵抗动态载荷的新的潜在物理机制尚未被发现和充分探索。根据该奖项进行的研究将阐明MAX相的变形和损伤的物理机制，并解决关于MAX相在动态加载条件下的本构行为作为温度的函数的基本问题，以及我们对准静态条件下的MAX相的变形和破坏机制的理解可以扩展到极高的形变率的程度。从技术角度来看，该项目的成功完成将使人们更深入地了解这种用于极端服务条件的新型材料的组成、结构和机械性能之间的联系，从而进一步发展发电、高超声速和轨道再入飞行、弹道保护等。教育和外联计划侧重于一系列活动，包括：在德克萨斯A&A&M和罗德岛大学之间建立强大的综合研究、教育和外联合作，重点关注新型陶瓷在极端载荷条件下的机械行为；指导和培训陶瓷材料实验力学和材料科学领域的下一代专家；并将本科生和研究生联系起来？通过他们在课程工作、研究项目和论文研究中密切参与研究，为他们的教育提供研究经验。