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Title: HRTEM Study of the Role of Nanoparticles in ODS Ferritic Steel

Abstract

Structures of nanoparticles and their role in dual-ion irradiated Fe-16Cr-4.5Al-0.3Ti-2W-0.37Y{sub 2}O{sub 3} (K3) ODS ferritic steel produced by mechanical alloying (MA) were studied using high-resolution transmission electron microscopy (HRTEM) techniques. The observation of Y{sub 4}Al{sub 2}O{sub 9} complex-oxide nanoparticles in the ODS steel imply that decomposition of Y{sub 2}O{sub 3} in association with internal oxidation of Al occurred during mechanical alloying. HRTEM observations of crystalline and partially crystalline nanoparticles larger than {approx}2 nm and amorphous cluster-domains smaller than {approx}2 nm provide an insight into the formation mechanism of nanoparticles/clusters in MA/ODS steels, which we believe involves solid-state amorphization and re-crystallization. The role of nanoparticles/clusters in suppressing radiation-induced swelling is revealed through TEM examinations of cavity distributions in (Fe + He) dual-ion irradiated K3-ODS steel. HRTEM observations of helium-filled cavities (helium bubbles) preferably trapped at nanoparticle/clusters in dual-ion irradiated K3-ODS are presented.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1026918
Report Number(s):
LLNL-PROC-497352
TRN: US201121%%134
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: 2010 MRS Fall Meeting, Boston, MA, United States, Nov 28 - Dec 03, 2010
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMORPHOUS STATE; BUBBLES; CAVITIES; CRYSTALLIZATION; FERRITIC STEELS; HELIUM; ION BEAMS; IRRADIATION; OXIDATION; SWELLING; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Hsiung, L, Tumey, S, Fluss, M, Serruys, Y, and Willaime, F. HRTEM Study of the Role of Nanoparticles in ODS Ferritic Steel. United States: N. p., 2011. Web.
Hsiung, L, Tumey, S, Fluss, M, Serruys, Y, & Willaime, F. HRTEM Study of the Role of Nanoparticles in ODS Ferritic Steel. United States.
Hsiung, L, Tumey, S, Fluss, M, Serruys, Y, and Willaime, F. 2011. "HRTEM Study of the Role of Nanoparticles in ODS Ferritic Steel". United States. https://www.osti.gov/servlets/purl/1026918.
@article{osti_1026918,
title = {HRTEM Study of the Role of Nanoparticles in ODS Ferritic Steel},
author = {Hsiung, L and Tumey, S and Fluss, M and Serruys, Y and Willaime, F},
abstractNote = {Structures of nanoparticles and their role in dual-ion irradiated Fe-16Cr-4.5Al-0.3Ti-2W-0.37Y{sub 2}O{sub 3} (K3) ODS ferritic steel produced by mechanical alloying (MA) were studied using high-resolution transmission electron microscopy (HRTEM) techniques. The observation of Y{sub 4}Al{sub 2}O{sub 9} complex-oxide nanoparticles in the ODS steel imply that decomposition of Y{sub 2}O{sub 3} in association with internal oxidation of Al occurred during mechanical alloying. HRTEM observations of crystalline and partially crystalline nanoparticles larger than {approx}2 nm and amorphous cluster-domains smaller than {approx}2 nm provide an insight into the formation mechanism of nanoparticles/clusters in MA/ODS steels, which we believe involves solid-state amorphization and re-crystallization. The role of nanoparticles/clusters in suppressing radiation-induced swelling is revealed through TEM examinations of cavity distributions in (Fe + He) dual-ion irradiated K3-ODS steel. HRTEM observations of helium-filled cavities (helium bubbles) preferably trapped at nanoparticle/clusters in dual-ion irradiated K3-ODS are presented.},
doi = {},
url = {https://www.osti.gov/biblio/1026918}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {8}
}

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