Diffraction Studies of the Structure and Properties of Grain Boundaries in Face-Centered-Cubic Metallic Materials

本文研究了大角度药柱的结构 使用康奈尔大学的X射线衍射设备 高能同步加速器源。 粮食原子结构 根据X-射线衍射结果确定边界 和模特。 这项研究包括对杂质的研究 偏析扭曲边界和热性能 晶界 该计划提供了重要的，高质量的 精确的晶界模型所需的数据，并给出 关于晶界结构变化的基本知识 由于成分或温度的变化。

This research examines the structure of large angle grain boundaries using the X-ray diffraction facility at the Cornell High Energy Synchrotron Source. Atomic structure of grain boundaries is determined based on the X-ray diffraction results and modeling. The research includes a study of impurity segregation to twist boundaries and the thermal properties of grain boundaries. The program provides important, high quality data needed for accurate models of grain boundaries and gives fundamental knowledge concerning grain boundary structure shifts due to composition or temperature changes.