Size-dependent characteristics of ultra-fine oxygen-enriched nanoparticles in austenitic steels

Yinbin Miao; Kun Mo; Zhangjian Zhou; Xiang Liu; Kuan Che Lan; Guangming Zhang; Michael K. Miller; Kathy A. Powers; James F. Stubbins

doi:10.1016/j.jnucmat.2016.08.014

Size-dependent characteristics of ultra-fine oxygen-enriched nanoparticles in austenitic steels

Yinbin Miao, Kun Mo, Zhangjian Zhou, Xiang Liu, Kuan Che Lan, Guangming Zhang, Michael K. Miller, Kathy A. Powers, James F. Stubbins

Nuclear, Plasma, and Radiological Engineering

Research output: Contribution to journal › Article

Abstract

Here, a coordinated investigation of the elemental composition and morphology of ultra-fine-scale nanoparticles as a function of size within a variety of austenitic oxide dispersion-strengthened (ODS) steels is reported. Atom probe tomography was utilized to evaluate the elemental composition of these nanoparticles. Meanwhile, the crystal structures and orientation relationships were determined by high-resolution transmission electron microscopy. The nanoparticles with sufficient size (>4 nm) to maintain a Y₂Ti_2−xO_7−2x stoichiometry were found to have a pyrochlore structure, whereas smaller Y_xTi_yO_z nanoparticles lacked a well-defined structure. The size-dependent characteristics of the nanoparticles in austenitic ODS steels differ from those in ferritic/martensitic ODS steels.

Original language	English (US)
Pages (from-to)	195-201
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	480
DOIs	https://doi.org/10.1016/j.jnucmat.2016.08.014
State	Published - Nov 1 2016

Keywords

Atom probe tomography
Austenitic steels
High-resolution transmission electron microscopy (HRTEM)
Nanostructure
Oxide dispersion strengthened (ODS) alloy

ASJC Scopus subject areas

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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Miao, Y., Mo, K., Zhou, Z., Liu, X., Lan, K. C., Zhang, G., Miller, M. K., Powers, K. A., & Stubbins, J. F. (2016). Size-dependent characteristics of ultra-fine oxygen-enriched nanoparticles in austenitic steels. Journal of Nuclear Materials, 480, 195-201. https://doi.org/10.1016/j.jnucmat.2016.08.014

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title = "Size-dependent characteristics of ultra-fine oxygen-enriched nanoparticles in austenitic steels",

abstract = "Here, a coordinated investigation of the elemental composition and morphology of ultra-fine-scale nanoparticles as a function of size within a variety of austenitic oxide dispersion-strengthened (ODS) steels is reported. Atom probe tomography was utilized to evaluate the elemental composition of these nanoparticles. Meanwhile, the crystal structures and orientation relationships were determined by high-resolution transmission electron microscopy. The nanoparticles with sufficient size (>4 nm) to maintain a Y2Ti2−xO7−2x stoichiometry were found to have a pyrochlore structure, whereas smaller YxTiyOz nanoparticles lacked a well-defined structure. The size-dependent characteristics of the nanoparticles in austenitic ODS steels differ from those in ferritic/martensitic ODS steels.",

keywords = "Atom probe tomography, Austenitic steels, High-resolution transmission electron microscopy (HRTEM), Nanostructure, Oxide dispersion strengthened (ODS) alloy",

author = "Yinbin Miao and Kun Mo and Zhangjian Zhou and Xiang Liu and Lan, {Kuan Che} and Guangming Zhang and Miller, {Michael K.} and Powers, {Kathy A.} and Stubbins, {James F.}",

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AU - Miao, Yinbin

AU - Mo, Kun

AU - Zhou, Zhangjian

AU - Liu, Xiang

AU - Lan, Kuan Che

AU - Zhang, Guangming

AU - Miller, Michael K.

AU - Powers, Kathy A.

AU - Stubbins, James F.

PY - 2016/11/1

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N2 - Here, a coordinated investigation of the elemental composition and morphology of ultra-fine-scale nanoparticles as a function of size within a variety of austenitic oxide dispersion-strengthened (ODS) steels is reported. Atom probe tomography was utilized to evaluate the elemental composition of these nanoparticles. Meanwhile, the crystal structures and orientation relationships were determined by high-resolution transmission electron microscopy. The nanoparticles with sufficient size (>4 nm) to maintain a Y2Ti2−xO7−2x stoichiometry were found to have a pyrochlore structure, whereas smaller YxTiyOz nanoparticles lacked a well-defined structure. The size-dependent characteristics of the nanoparticles in austenitic ODS steels differ from those in ferritic/martensitic ODS steels.

AB - Here, a coordinated investigation of the elemental composition and morphology of ultra-fine-scale nanoparticles as a function of size within a variety of austenitic oxide dispersion-strengthened (ODS) steels is reported. Atom probe tomography was utilized to evaluate the elemental composition of these nanoparticles. Meanwhile, the crystal structures and orientation relationships were determined by high-resolution transmission electron microscopy. The nanoparticles with sufficient size (>4 nm) to maintain a Y2Ti2−xO7−2x stoichiometry were found to have a pyrochlore structure, whereas smaller YxTiyOz nanoparticles lacked a well-defined structure. The size-dependent characteristics of the nanoparticles in austenitic ODS steels differ from those in ferritic/martensitic ODS steels.

KW - Atom probe tomography

KW - Austenitic steels

KW - High-resolution transmission electron microscopy (HRTEM)

KW - Nanostructure

KW - Oxide dispersion strengthened (ODS) alloy

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