Texture and Toughness in Single Phase Ceramics

单相陶瓷的织构和韧性

• 批准号: 9100035
• 负责人: Katherine Faber
• 金额: $ 23.7万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9100035&HistoricalAwards=false
• 关键词: Texture; Toughness; Single; Phase; Ceramics

In this research the influence of an innovative processing method on the mechanical behavior of ceramic materials will be studied. In particular, it is proposed to control crystallographic texture by magnetically-assisted grain alignment during the processing of paramagnetic ceramics, namely iron titanate and yttrium barium copper high temperature superconductor material. It is expected that controlled texture may influence the magnitude of residual stresses within the microstructure of these ceramics, and hence, the magnitude of grain bridging and microcracking induced toughening. The PI will collaborate with researchers at NIST to measure residual stresses with neutron diffraction and microcracking with neutron scattering in-situ as the material is cooled from processing temperature. It is expected that these studies will provide a general framework for microstructural design and mechanical property control of ceramics by the application of a magnetic field during processing.

在本研究中，将研究创新加工方法对陶瓷材料机械行为的影响。特别是，提出了在顺磁陶瓷（即钛酸铁和钇钡铜高温超导材料）加工过程中通过磁辅助晶粒排列来控制晶体织构。预计受控织构可能会影响这些陶瓷微观结构内残余应力的大小，从而影响晶粒桥接和微裂纹引起的增韧的大小。 PI 将与 NIST 的研究人员合作，当材料从加工温度冷却时，通过中子衍射和中子散射原位测量残余应力。预计这些研究将为通过在加工过程中应用磁场来控制陶瓷的微观结构设计和机械性能提供通用框架。