Influence of Temperature on Indentation-Induced Flaw Nucleation Processes in Ceramic Materials

本研究的目的是对陶瓷材料中压痕诱导的缺陷形核有一个详细的了解。一种独特的高温显微硬度计，能够工作到1600摄氏度，将用于生产压痕。用扫描电子显微镜和透射电子显微镜对压痕位置进行表征，以确定晶相、载荷和温度对导致缺陷形核的变形机制的影响。最初，将使用氧化铝、氧化镁和钛酸钡的单晶，然后是双晶。

The goal of this research is to obtain a detailed understanding of indentation-induced flaw nucleation in ceramic materials. A unique high temperature microhardness tester, capable of operating up to 1600 0C, will be used to produce indentations. Indentation sites will be characterized by SEM and TEM in order to determine effect of crystallography, load, and temperature on the deformation mechanisms leading flaw nucleation. Initially, single crystals of alumina, magnesium oxide, and barium titanate will be used, followed by bicrystals.