Crystallographic Texture of Structural Ceramics

本研究的目的是研究氧化铝、氮化硅和氧化锆陶瓷材料中晶体织构的发展及其对力学/物理性能的影响。这项工作将涉及以下方面的基础研究：致密化过程中的织构发育机制，包括应力辅助致密化；作为织构函数的致密材料的机械和物理性能的评价；建立了织构发展机制和织构对性能的影响模型。这项工作将涉及广泛的加工（热锻造和热挤压）和表征（微观结构：x射线极线图、光学、扫描电镜和透射电镜；机械性能：断裂韧性、弹性模量、疲劳裂纹扩展）研究。

The objective of this research is to study the development and the mechanical/physical property effects of crystallographic texture in aluminum oxide, silicon nitride, and zirconia ceramic materials. This work will involve fundamental studies of: texture development mechanisms during densification, including stress-assisted densification; evaluation of the mechanical and physical properties of the densified materials as a function of texture; and, modeling of the texture development mechanisms and textural effects on properties. This work will involve extensive processing (hot forging and hot extrusion) and characterization (microstructural: x-ray pole figures, optical, SEM, and TEM; and mechanical property: fracture toughness, elastic modulus, fatigue crack growth) studies.