The development and stability of Y–Ti–O nanoclusters in mechanically alloyed Fe–Cr based ferritic alloys

Alinger, M.J.; Odette, G.R.; Hoelzer, David T.

doi:10.1016/j.jnucmat.2004.04.042

Cited by 198 publications

(128 citation statements)

References 7 publications

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“…[3][4][5] Hence, previous studies have attempted to clarify the characterization of the nano-scale oxide particles using TEM (transmission electron microscope), 3DAP (three-dimensional atom probe), and SANS (small angle neutron scattering) measurements, etc. [6][7][8] However, the detailed sequence of events in their formation and their stability during longterm high temperature service are not well understood yet. Thus, the main topics of these studies were not the mechanism of formation but the distribution morphology and/or effects on mechanical properties of oxide particles.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Approach for Growth and Coalescence of Nano-Size Oxide Particles in 9Cr-ODS Steel Using High-Energy Synchrotron Radiation X-rays in SPring-8

et al. 2009

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Nanometer size oxide particles in 9Cr-ODS steel are dispersed finely and densely in a matrix by the hot-solidification process. The size and density distribution of dispersed oxide particles is recognized as one of the main issues for ensuring good microstructural stability and high temperature strength in a high temperature (<700 C) and neutron irradiation (250 dpa) environment. However, the behavior of oxide particles in the hot-solidification process has not been determined yet. This study evaluated the correlation between nano-size oxide particles and the heat treatment temperature and time in order to characterize the mechanism of formation and the behavior during growth and coalescence of these particles in 9Cr-ODS steel raw powder. XRD and SAXS measurements were made using high-energy synchrotron radiation X-rays in SPring-8. This is the first report of the oxide complex particles (Y 2 Ti 2 O 7 and Y 2 TiO 5 ) being formed from 800 to 960 C, and they were observed to grow and coalesce on increasing both heat-treatment temperature and time.

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Section: Introductionmentioning

confidence: 99%

Kinetic Approach for Growth and Coalescence of Nano-Size Oxide Particles in 9Cr-ODS Steel Using High-Energy Synchrotron Radiation X-rays in SPring-8

et al. 2009

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“…However, there is a kinetic limit for particle growth due to the unavailability of Y atoms which movement is restricted at such low temperatures. At higher temperature, the measured activation energy can be correlated with the activation energy of diffusion of solute substitutional atoms (e.g., Y, Ti) in iron, which is *400 kJ/mol [17,18]. As a result relatively fast, diffusion-controlled particle growth takes place.…”

Section: Coarsening Mechanism Of Oxide Nanoparticlesmentioning

confidence: 99%

Microstructural changes upon annealing in ODS-strengthened ultrafine grained ferritic steel

et al. 2013

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In this study, the stability of grain size and oxide nanoparticles in the ODS steel upon annealing at high temperature (650-1350°C) has been evaluated. The ODS Fe-Cr-W-Ti-Y 2 O 3 steel has been manufactured by powder metallurgy, consolidated by hot isostatic pressing and processed by hydrostatic extrusion. Such a processing brings about ultrafine grain structure reinforced with oxide nanoparticles (few nm in diameter) and results in superior mechanical properties. The stability of nano-oxides has been analyzed by small angle X-ray scattering together with transmission electron microscopy. The results obtained revealed excellent thermal stability of ultrafine grained ODS ferritic steel, which was attributed to the resistance of oxides against coarsening.

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“…Much higher patterning temperatures are experimentally obtained by using highly NFAs are distinguished from more traditional oxide dispersion steels by a higher number density and smaller size of precipitates, which produce much greater interfacial area available for trapping and recombining point defects [45,[47][48][49][50].…”

Section: Stable Microstructuresmentioning

confidence: 99%

Atomic-scale design of radiation-tolerant nanocomposites

2010

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Recent work indicates that materials with nanoscale architectures, such as nanolayered Cu-Nb composites and nanoscale oxide dispersion-strengthened steels, are both thermally stable and offer improved performance under irradiation.Current understanding of the atomic-level response of such materials to radiation yields insights into how controlling composition, morphology and interface-defect interactions may further enable atomic-scale design of radiation tolerant nanostructured composite materials. With greater understanding of irradiationassisted degradation mechanisms, this bottom-up design approach may pave the way for creating the extreme environment-tolerant structural materials needed to meet the world's clean energy demand by expanding use of advanced fission and future fusion power.2

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The development and stability of Y–Ti–O nanoclusters in mechanically alloyed Fe–Cr based ferritic alloys

Cited by 198 publications

References 7 publications

Kinetic Approach for Growth and Coalescence of Nano-Size Oxide Particles in 9Cr-ODS Steel Using High-Energy Synchrotron Radiation X-rays in SPring-8

Kinetic Approach for Growth and Coalescence of Nano-Size Oxide Particles in 9Cr-ODS Steel Using High-Energy Synchrotron Radiation X-rays in SPring-8

Microstructural changes upon annealing in ODS-strengthened ultrafine grained ferritic steel

Atomic-scale design of radiation-tolerant nanocomposites

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