Diffusion and surface alloying of gradient nanostructured metals

• Zhenbo Wang and
• Ke Lu

Beilstein J. Nanotechnol. 2017, 8, 547–560, doi:10.3762/bjnano.8.59

• diffusion behavior in GNS metals is crucial for understanding the diffusion mechanism and relative characteristics of different interfaces that provide fundamental understanding for advancing the traditional surface alloying processes. In this paper, atomic diffusion, reactive diffusion, and surface

• , different surface alloying processes, such as nitriding and chromizing, have been modified significantly, and some diffusion-related properties have been enhanced. Finally, the perspectives on current research in this field are discussed. Keywords: diffusion; gradient nanostructures; grain boundary

• ; interface; surface alloying; Introduction A gradient nanostructure is a unique architecture in which a layer of nanoscale-grained structure adheres to a ductile coarse-grained (CG) substrate of the same material; a transition layer with graded grain sizes is positioned between them. This architecture with