Abstract
In this research, an ion milling equipment was used to elaborate nanoparticles from Cu-Zn-Al alloys with shape memory effect. Two different compositions were used, target A: 75.22Cu-17.12Zn-7.66Al at % with an Ms of -9 °C and target B: 76.18Cu-15.84Zn-7.98Al with an Ms of 20 °C. Nanoparticles were characterized by High Resolution Transmission Electron Microscopy, Electron Diffraction and Energy Dispersive X-ray Spectroscopy. The obtained nanoparticles showed a small dispersion, with a size range of 3.2-3.5 nm. Their crystal structure is in good agreement with the bulk martensitic structure of the targets. In this sense, results on morphology, composition and crystal structure have indicated that it is possible to produce nanoparticles of CuZnAl shape memory alloys with martensitic structure in a single process using Ion Milling.
Highlights
Nanoparticles have different properties in comparison with bulk or even microparticles
It has been reported that the transformation takes place in bulk materials after a severe deformation and different heat treatments when the grain size of the alloy is around 40 nm[9,10,11,12,13]
It can be confirmed that the three elements of the bulk material are presented
Summary
Nanoparticles have different properties in comparison with bulk or even microparticles. Metallic nanoparticles are elaborated from CuZnAl SMA bulks using a physical method, ion milling, trying to reproduce the chemical composition and the structure of the bulk. The results obtained in this work have shown that by this method, the structure of ternary CuZnAl alloys can be reproducible.
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