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.

在这项研究中，将研究一种创新处理方法对陶瓷材料机械行为的影响。特别是，建议在磁磁陶瓷加工过程中通过磁辅助晶粒对齐来控制晶体学质地，即钛酸铁和Yttrium钡铜铜高温超导体材料。预计受控的纹理可能会影响这些陶瓷微结构内的残余应力的大小，因此，谷物桥接和微裂纹引起的韧性幅度。 PI将与NIST的研究人员合作，以中子衍射和微裂纹和中子散射为原位的残余应力，因为材料从加工温度冷却。预计这些研究将通过在处理过程中应用磁场来为陶瓷的微结构设计和机械性能控制提供一个通用框架。