| Autor: |
Gunderov, Dmitriy, Boltynjuk, Evgeniy, Ubyivovk, Evgeniy, Lukyanov, Alexander, Churakova, Anna, Zamula, Yuri, Batyrshin, Eduard, Kilmametov, Askar, Valiev, Ruslan Z. |
| Zdroj: |
Diffusion and Defect Data Part A: Defect and Diffusion Forum; July 2018, Vol. 385 Issue: 1 p200-205, 6p |
| Abstrakt: |
The amorphous Ti50Ni25Cu25 alloy was subjected to high pressure torsion (HPT) processing. TEM studies revealed in the structure of the HPT-processed samples the presence of nanocrystals with a size of about 5 nm and amorphous clusters with a size of about 10-30 nm. Atomic force microscopy (AFM) was used to study the surface morphology of foils prepared by ion polishing from the initial amorphous ribbons and HPT-processed samples. AFM images of the foil prepared from the initial ribbon revealed a smooth surface with an average roughness of 0.3 nm. A totally different surface morphology was observed for the foil prepared from the HPT-processed state by the same regime of ion polishing: the presence of holes with a depth of 2-4 nm and a width of 10-30 nm. The changes in the surface morphology, namely the holes-like surface morphology of the HPT-processed state, could be explained by a complex transformation of the amorphous structure, and probably by the variation and redistribution of free volume, which leads to the emergence of a cluster contrast in TEM images. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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