In the design of used nuclear fuel containers for deep geological repositories, copper is considered to be a suitable and long-lived barrier for corrosion resistance. The microstructures of state-of-the-art copper materials used in this application produced through extrusion, a grain boundary engineered electrodeposition technique and cold spraying were studied via electron backscattered diffraction. Desirable microstructural characteristics for localized corrosion resistance of pure copper were compiled from the literature considering grain size, grain boundary character distribution, and crystallographic texture. The subject copper materials were found to have favourable microstructures for localized corrosion resistance, in particular, a high fraction of special grain boundaries, especially Σ3 twins, rendering them suitable for the given application.

在用于深层地质处置库的二手核燃料容器的设计中，铜被认为是抗腐蚀的合适且长寿命的屏障。通过电子背散射衍射研究了通过挤压，晶界工程电沉积技术和冷喷涂生产的本应用中使用的最新铜材料的微观结构。考虑到晶粒尺寸，晶界特征分布和晶体学织构，从文献中汇编了纯铜局部抗腐蚀性能的理想微结构特征。发现本主题的铜材料具有有利于局部耐腐蚀的良好微观组织，尤其是很大一部分特殊的晶界，特别是Σ3孪晶，