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

温度对陶瓷材料压痕诱导缺陷成核过程的影响

• 批准号: 8920844
• 负责人: Helen Chan
• 金额: $ 27万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-15 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8920844&HistoricalAwards=false
• 关键词: Influence; Temperature; Indentation; Induced; Flaw

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.

这项研究的目的是获得一个详细的 对陶瓷压痕裂纹形核的认识 材料. 独特的高温显微硬度计， 能够在高达1600摄氏度的温度下运行，将用于生产 压痕。 压痕部位将通过SEM表征， TEM，以确定晶体学、负载和 温度对变形机制的影响 成核 最初，氧化铝，镁， 氧化物和钛酸钡，然后是双晶体。