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Title: Vacancy-controlled ultrastable nanoclusters in nanostructured ferritic alloys

Abstract

A new class of advanced structural materials, based on the Fe-O-vacancy system, has exceptional resistance to high-temperature creep and excellent tolerance to extremely high-dose radiation. Although these remarkable improvements in properties compared to steels are known to be associated with the Y-Ti-O-enriched nanoclusters, the roles of vacancies in facilitating the nucleation of nanoclusters are a long-standing puzzle, due to the experimental difficulties in characterizing vacancies, particularly in-situ while the nanoclusters are forming. We report an experiment study that provides the compelling evidence for the presence of significant concentrations of vacancies in Y-Ti-O-enriched nanoclusters in a nanostructured ferritic alloy using a combination of state-of-the-art atom-probe tomography and in situ small angle neutron scattering. The nucleation of nanoclusters starts from the O-enriched solute clustering with vacancy mediation. The nanoclusters grow with an extremely low growth rate through attraction of vacancies and O:vacancy pairs, leading to the unusual stability of the nanoclusters.

Authors:
 [1];  [2];  [3];  [2]
  1. Harbin Engineering Univ., Harbin (China); Oak Ridge National Lab., Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. City Univ. of Hong Kong, Kowloon (Hong Kong)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1207043
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; characterization and analytical techniques; metals and alloys; nanoparticles; nanoscale materials

Citation Formats

Zhang, Z. W., Yao, L., Wang, X. -L., and Miller, M. K. Vacancy-controlled ultrastable nanoclusters in nanostructured ferritic alloys. United States: N. p., 2015. Web. doi:10.1038/srep10600.
Zhang, Z. W., Yao, L., Wang, X. -L., & Miller, M. K. Vacancy-controlled ultrastable nanoclusters in nanostructured ferritic alloys. United States. doi:10.1038/srep10600.
Zhang, Z. W., Yao, L., Wang, X. -L., and Miller, M. K. Fri . "Vacancy-controlled ultrastable nanoclusters in nanostructured ferritic alloys". United States. doi:10.1038/srep10600. https://www.osti.gov/servlets/purl/1207043.
@article{osti_1207043,
title = {Vacancy-controlled ultrastable nanoclusters in nanostructured ferritic alloys},
author = {Zhang, Z. W. and Yao, L. and Wang, X. -L. and Miller, M. K.},
abstractNote = {A new class of advanced structural materials, based on the Fe-O-vacancy system, has exceptional resistance to high-temperature creep and excellent tolerance to extremely high-dose radiation. Although these remarkable improvements in properties compared to steels are known to be associated with the Y-Ti-O-enriched nanoclusters, the roles of vacancies in facilitating the nucleation of nanoclusters are a long-standing puzzle, due to the experimental difficulties in characterizing vacancies, particularly in-situ while the nanoclusters are forming. We report an experiment study that provides the compelling evidence for the presence of significant concentrations of vacancies in Y-Ti-O-enriched nanoclusters in a nanostructured ferritic alloy using a combination of state-of-the-art atom-probe tomography and in situ small angle neutron scattering. The nucleation of nanoclusters starts from the O-enriched solute clustering with vacancy mediation. The nanoclusters grow with an extremely low growth rate through attraction of vacancies and O:vacancy pairs, leading to the unusual stability of the nanoclusters.},
doi = {10.1038/srep10600},
journal = {Scientific Reports},
number = ,
volume = 5,
place = {United States},
year = {Fri May 29 00:00:00 EDT 2015},
month = {Fri May 29 00:00:00 EDT 2015}
}

Journal Article:
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Cited by: 5 works
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Works referenced in this record:

Reduction and analysis of SANS and USANS data using IGOR Pro
journal, November 2006


Atomic structure of nanoclusters in oxide-dispersion-strengthened steels
journal, October 2011

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