Texture and Toughness in Single Phase Ceramics

在这项研究中，一种创新的加工方法 对陶瓷材料力学行为的影响。在 特别地，建议通过以下方式来控制晶体织构： 磁辅助晶粒排列 顺磁陶瓷，即钛酸铁和钇钡 铜高温超导材料预计 控制纹理可能会影响残留的大小， 这些陶瓷的微观结构内的应力，因此， 晶粒桥接和微裂纹的大小 增韧PI将与NIST的研究人员合作， 用中子衍射测量残余应力， 微裂纹与中子散射原位作为材料， 从加工温度冷却。预计这些 研究将为微结构设计提供一个总体框架 和机械性能控制陶瓷的应用 在加工过程中产生磁场。

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.