Crystallographic Texture of Structural Ceramics

本研究的目的是研究 以及晶体学的机械/物理性质效应 氧化铝、氮化硅和氧化锆陶瓷中织构 材料. 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形成机制，包括 应力辅助致密化;力学性能和 致密材料的物理性质作为以下的函数： 纹理;以及，纹理发展机制的建模， 质地对性能的影响。 这项工作将涉及广泛的 加工（热锻和热挤压）和表征 （微观结构：X射线极图、光学、SEM和TEM;以及 力学性能：断裂韧性、弹性模量、疲劳 裂纹生长）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.