Positron studies of interaction between yttrium atoms and vacancies in bcc iron with relevance for ODS nanoparticles formation

He, C W; Barthe, M.F.; Desgardin, P.; Akhmadaliev, Shavkat; Behar, M.; Jomard, François

doi:10.1016/j.jnucmat.2014.07.027

Cited by 10 publications

(4 citation statements)

References 14 publications

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“…Physico-chemical methods can be tentatively classified into ion implantation [72][73][74] , epitaxy including chemical vapor deposition (CVD) and physical vapor deposition (PVD) as well as related variants such as electron beam PVD, [75] molecular beam epitaxy, [76] magnetron sputtering [77] and pulsed laser deposition (PLD). These methods are typically capable of producing samples of lateral dimensions of 10 mm (or less if required) and layers ranging from 10 nm to 1 µm thickness that generally serve as model systems for the investigation of the behavior of interfaces between Fe-matrix and oxide-particles, e.g.…”

Section: E Physico-chemical Methodsmentioning

confidence: 99%

Alternative Fabrication Routes toward Oxide-Dispersion-Strengthened Steels and Model Alloys

Bergner

Hilger

Virta

et al. 2016

Metall Mater Trans A

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The standard powder metallurgy (PM) route for the fabrication of oxide-dispersion-strengthened (ODS) steels involves gas atomization to produce a prealloyed powder, mechanical alloying (MA) with fine oxide powders, consolidation, and finally thermal/thermomechanical treatment (TMT). It is well established that ODS steels with superior property combinations, for example, creep and tensile strength, can be produced by this PM/MA route. However, the fabrication process is complex and expensive, and the fitness for scaling up to the industrial scale is limited. At the laboratory scale, production of small amounts of well-controlled model systems continues to be desirable for specific purposes, such as modeling-oriented experiments. Thus, from the laboratory to industrial application, there is growing interest in complementary or alternative fabrication routes for ODS steels and related model systems, which offer a different balance of cost, convenience, properties, and scalability

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Section: E Physico-chemical Methodsmentioning

confidence: 99%

Alternative Fabrication Routes toward Oxide-Dispersion-Strengthened Steels and Model Alloys

Bergner

Hilger

Virta

et al. 2016

Metall Mater Trans A

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“…Another PAS study devoted to Fe, by C.W. He et al [ 49 ], used SPB DBS to investigate the interaction between vacancies and Yttrium atoms in BCC iron irradiated with 1.2 MeV Y ions at room temperature and fluences from 1 × 10 14 cm −2 to 3.0 × 10 15 cm −2 . The authors also observed a decrease in the size of the vacancy clusters with increasing fluence; however, in this case, the concentration of these decreased too.…”

Section: Application Of Pas Techniques In Accelerator-based Irradiation Experimentsmentioning

confidence: 99%

Application of Positron Annihilation Spectroscopy in Accelerator-Based Irradiation Experiments

et al. 2021

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Positron annihilation spectroscopy (PAS) is widely recognized as a powerful characterization technique in all types of radiation damage studies in nuclear materials. In the past, fission reactor irradiation of reactor pressure vessel (RPV) steels was a primary aim in most studies, while today’s applications of PAS in this field are centered around ion implantation experiments in advanced structural materials. These experiments use hydrogen, helium, heavy ions, and their combination to simulate various radiation environments of future nuclear reactors or nuclear research facilities. The spectrum of ion energies used ranges from a few tens of keV to tens or even hundreds of MeV in proton irradiation or spallation neutron source irradiation experiments. The variety of ion energies, irradiation temperatures, and other experimental conditions poses a major challenge to researchers, who often fail to successfully incorporate the lessons learned from their research. In this paper, we review and supplement recent PAS studies in which structural materials irradiated under a variety of irradiation conditions were investigated using positron annihilation spectroscopy. It summarizes the most important conclusions and lessons learned from the application of PAS in accelerator-based irradiation experiments.

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“…Systematic study of construction materials was carried out in [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. The following materials were under investigation: steels of ferrite -martensitic class [11-14, 18, 19, 20, 26-30], vanadium alloys [20], NiCr alloys [21][22][23], oxide dispersion alloys [15] and model alloys [4,[16][17]24].…”

Section: Introductionmentioning

confidence: 99%

“…NGR method was used in [25] as an additional method since it is sensitive to short-range ordering. Nevertheless industrial materials (steels) were investigated in [26][27][28][29][30]. It was shown in [26] that positron annihilation lifetime technique is the most sensitive instrument of studying defects with small number of vacancies.…”

Section: Introductionmentioning

confidence: 99%

Changes of electron density and defects distribution in binary and ternary iron alloys studied by positron annihilation

Udovsky

Grafutin

Kolotushkin

et al. 2017

J min metall B Metall

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Properties of binary and ternary iron based alloys doped by different additions were investigated. It was shown for binary alloys containing chromium, molybdenum and tungsten were that results of doping by 0.8% molybdenum and tungsten were similar to those for the sample doped by 9%chromium. Ternary alloys containing chromium and less amounts of molybdenum, tungsten and vanadium were investigated as well. Two types of defects were observed: divacancies and cluster-like defects. It was shown that the electron density in ternary alloys is similar to that in binary alloys containing 0.8% molybdenum.

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Positron studies of interaction between yttrium atoms and vacancies in bcc iron with relevance for ODS nanoparticles formation

Cited by 10 publications

References 14 publications

Alternative Fabrication Routes toward Oxide-Dispersion-Strengthened Steels and Model Alloys

Alternative Fabrication Routes toward Oxide-Dispersion-Strengthened Steels and Model Alloys

Application of Positron Annihilation Spectroscopy in Accelerator-Based Irradiation Experiments

Changes of electron density and defects distribution in binary and ternary iron alloys studied by positron annihilation

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