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The feasibility of Al-based oxide precipitation in Fe-10%Cr alloy by ion implantation

C. Zheng 1 A. Gentils 1 J. Ribis 2 O. Kaitasov 3 V.A. Borodin M. Descoins Dominique Mangelinck 4
1 CSNSM PS2
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
2 SRMA - Service des Recherches Métallurgiques Appliquées
3 CSNSM SEMI
CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
4 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
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.
Keywords : diffusion particles steels atom-probe tomography alpha-iron internal oxidation irradiation aluminim titanium metals fe-cr alloys ion implatation aluminium oxide precipitation transmission electron microscopy
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Journal articles
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http://hal.in2p3.fr/in2p3-01079120
Contributor : Emilie Bonnardel <>
Submitted on : Friday, October 31, 2014 - 11:45:28 AM
Last modification on : Sunday, December 13, 2020 - 3:44:03 PM

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IN2P3 | CEA | UNIV-TLN | CSNSM | CNRS | UNIV-AMU | DEN | IM2NP | DEN-SACLAY

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C. Zheng, A. Gentils, J. Ribis, O. Kaitasov, V.A. Borodin, et al.. The feasibility of Al-based oxide precipitation in Fe-10%Cr alloy by ion implantation. Philosophical Magazine, Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2014, pp.2937-2955. ⟨10.1080/14786435.2014.941028⟩. ⟨in2p3-01079120⟩

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