Ultrafast diffusion and internal porosity in ultrafine-grained copper―lead alloy prepared by equal channel angular pressing
Ultrafast diffusion and internal porosity in ultrafine-grained copper―lead alloy prepared by equal channel angular pressing
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DOI：
10.1016/j.scriptamat.2009.03.029
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发表时间：
2009-07
影响因子：
6
通讯作者：
Jens Ribbe;D. Baither;G. Schmitz;S. Divinski
中科院分区：
文献类型：
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作者：
Jens Ribbe;D. Baither;G. Schmitz;S. Divinski
63Ni放射性示踪剂在等通道角压制制备的超细晶Cu-1wt.%Pb合金中的室温扩散揭示了超快输运路径的存在。即使在完全再结晶后，其中一些路径仍保留在材料中。使用聚焦离子束技术，可以显露出许多裂纹/孔隙。数十微米的远程示踪剂穿透证明了这种内部孔隙是通过高度扩散的路径互连的。该孔隙网络包括非平衡界面、微孔和微裂纹。
Room-temperature diffusion of63Ni radiotracer in ultrafine-grained Cu–1wt.%Pb alloy prepared by equal channel angular pressing reveals the existence of ultrafast transport paths. Some of these paths remain in the material even after complete recrystallization. Using the focused ion beam technique, numerous cracks/pores are revealed . Long-range tracer penetration over tens of micrometers proves that this internal porosity is interconnected by highly diffusive paths. This network of porosity comprises non-equilibrium interfaces, micropores and microcracks.