Formation of refined grains below 10 nm in size and nanoscale interlocking in the particle–particle interfacial regions of cold sprayed pure aluminum
| Autor: | Zhiying Liu, Eric Irissou, Hongze Wang, Michel J. R. Haché, Yu Zou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
plastic deformation
Materials science recrystallization Gas dynamic cold spray chemistry.chemical_element 02 engineering and technology 01 natural sciences pure aluminum Aluminium 0103 physical sciences nanostructures General Materials Science cold spray Composite material Nanoscopic scale Interlocking 010302 applied physics Mechanical Engineering Metals and Alloys Strain rate 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Nanocrystalline material chemistry Mechanics of Materials Particle 0210 nano-technology |
| Popis: | It has been a long-standing challenge to obtain nanocrystalline pure aluminum with grain sizes below 10 nm by plastic deformation. Here, we studied the microstructure characteristics of two bonded pure aluminum powder particles after a cold spray process. In the particle–particle bonding region, nanometer-sized grains are revealed, about 30% of which are below 10 nm in size. In the particle–particle interface, we observe nanoscale perturbations with interlocking features assisting mechanical bonding. The formation of nanoscale grains and interlocking features is attributed to the extremely high strain and strain rate combined with shear instability in the cold spray process. |
| Databáze: | OpenAIRE |
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