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: 1233792
• 负责人: Miladin Radovic
• 金额: $ 14.99万
• 依托单位: Texas A&M Engineering Experiment Station
• 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=1233792&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，研究新型纳米层陶瓷（MAX 相）及其固溶体在极端动态载荷条件下的机械响应。 MAX 相作为适用于极端环境的潜在多功能材料而引起了广泛关注，因为它们结合了陶瓷和金属的一些最佳属性。对 MAX 相的初步研究表明，尚未发现和充分探索可以使陶瓷材料抵抗动态载荷的新的基础物理机制。该奖项下进行的研究将阐明 MAX 相变形和损坏的物理机制，并解决有关 MAX 相在动态载荷条件下的本构行为随温度变化的基本问题，以及我们对变形和破坏的理解程度准静态条件下 MAX 相的机制可以扩展到极高的变形率。从技术角度来看，该项目的成功完成将有助于人们更深入地了解这类用于极端服役条件的新型材料的成分、结构和机械性能之间的联系，从而促进发电、高超音速和轨道再造等领域的进一步发展。 -入境飞行、弹道防护等。教育和推广计划重点关注一系列活动，包括：德克萨斯农工大学和罗德岛大学之间建立强大的综合研究、教育和推广合作，重点关注极端条件下新型陶瓷的机械行为装载条件；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？通过他们在课程作业、研究项目和论文研究中的密切参与，研究经验对他们的教育产生了影响。