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Journal articles
The feasibility of Al-based oxide precipitation in Fe-10%Cr alloy by ion implantation
Abstract : This paper reports the feasibility of nano-oxide precipitate formation in Fe-Cr alloy by ion implantation synthesis. High contents of Al+ and O+ ions were implanted into thin films of high purity Fe-10%Cr alloy at room temperature and were studied by transmission electron microscopy (TEM) and atom probe tomography (APT). In contrast, to the common two-stage implantation/annealing scheme of precipitate ensemble synthesis by ion beams, cluster formation took place at the implantation stage in our study, requiring no subsequent high-temperature annealing. The post-implantation microstructural examination revealed in the as-implanted thin foil an array of precipitates with diameters in the range of 3-30 nm. The precipitate number density distribution was found to depend on the foil thickness. The precipitate enrichment with both Al and O was confirmed by the energy-filtered TEM analysis. Judging from the electron diffraction pattern and high-resolution TEM analysis, the crystal lattice of precipitates corresponds to some cubic modification of aluminium-rich oxide or pure aluminium oxide. The precipitate lattice alignment with the host matrix was revealed for at least a part of precipitates. The analysis of APT data using cluster detection algorithm indicates the presence of local zones enriched in Al and O, even in those areas of as-implanted samples where no clusters were visible by TEM.
http://hal.in2p3.fr/in2p3-01079120
Contributor : Emilie Bonnardel Connect in order to contact the contributor
Submitted on : Friday, October 31, 2014 - 11:45:28 AM
Last modification on : Monday, March 29, 2021 - 3:08:04 PM
Contributor : Emilie Bonnardel Connect in order to contact the contributor
Submitted on : Friday, October 31, 2014 - 11:45:28 AM
Last modification on : Monday, March 29, 2021 - 3:08:04 PM