Studies of Transformation-Toughened Zirconium Dioxide- Based Ceramics

相变增韧二氧化锆基陶瓷的研究

• 批准号: 8715622
• 负责人: Arthur Heuer
• 金额: $ 47.39万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1991-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8715622&HistoricalAwards=false
• 关键词: Studies; Transformation; Toughened; Zirconium; Dioxide

This research deals with the continuation of previous studies on the toughening mechanisms in zirconia alloys. The work will focus on two technically important systems with magnesia and ceria stabilizers, and will extend the previous microanalytical efforts, primarily via transmission electron microscopy, to include mechanical characterization and in situ studies of crack propagation. The study will address the very important question of the R-curve behavior in these materials, which requires a close collaboration between mechanical testing and microanalytical procedures. The materials being investigated here, and the toughening mechanisms being evaluated are extremely important from a technological standpoint, as the zirconia alloys and derivatives will have increasing number of applications in various products. Previous development of these materials has been largely empirical in nature, and development of a better scientific understanding of the toughening mechanisms in these systems would greatly aid future development and applications. The mechanisms of toughening in these materials are quite complex, and understanding the details of these mechanisms requires careful and detailed scientific analysis of the materials and the processes occurring therein.

这项研究涉及以前的延续 氧化锆合金的增韧机理研究。 的 工作将集中在两个技术上重要的系统， 氧化镁和二氧化铈稳定剂，并将延长以前的 微分析工作，主要通过透射电子 显微镜，包括机械表征和原位 裂纹扩展的研究。 这项研究将探讨 这些材料中R曲线行为的重要问题， 这需要机械测试和 和微量分析方法。 这里研究的材料， 评估的机制是非常重要的， 技术观点，作为氧化锆合金和衍生物 在各种产品中的应用越来越多。 这些材料的先前开发主要是 经验的性质，并制定一个更好的科学 了解这些系统的增韧机制， 对未来的发展和应用有很大的帮助。 的机制 在这些材料中的增韧是相当复杂的， 了解这些机制的细节需要仔细 并对材料进行了详细的科学分析， 其中发生的过程。