Microstructural analysis of impurity segregation around β-Nb precipitates in Zr-Nb alloy using positron annihilation spectroscopy and atom probe tomography

T. Toyama; Y. Matsukawa; K. Saito; Y. Satoh; H. Abe; Y. Shinohara; Y. Nagai

doi:10.1016/j.scriptamat.2015.07.005

Microstructural analysis of impurity segregation around β-Nb precipitates in Zr-Nb alloy using positron annihilation spectroscopy and atom probe tomography

T. Toyama, Y. Matsukawa, K. Saito, Y. Satoh, H. Abe, Y. Shinohara, Y. Nagai

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Impurity segregation at the interface between β-Nb precipitates and α-Zr matrix in Zr-2.5 wt.%Nb alloy was investigated by complementary analysis with positron annihilation spectroscopy (PAS) and atom probe tomography (APT). Fe segregation and Fe-decorated defects were found at the interface. PAS also suggested that Fe was segregated to a concentration of several tens of percent at a local region at the interface, which is approximately one order of magnitude higher than APT and difficult to observe directly even using APT.

Original language	English
Article number	10717
Pages (from-to)	156-159
Number of pages	4
Journal	Scripta Materialia
Volume	108
DOIs	https://doi.org/10.1016/j.scriptamat.2015.07.005
Publication status	Published - 2015 Nov 1

Keywords

Atom probe tomography
Impurity segregation
Positron annihilation spectroscopy
Precipitate interface
Zirconium alloy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2015.07.005

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Microstructural analysis of impurity segregation around β-Nb precipitates in Zr-Nb alloy using positron annihilation spectroscopy and atom probe tomography. / Toyama, T.; Matsukawa, Y.; Saito, K.; Satoh, Y.; Abe, H.; Shinohara, Y.; Nagai, Y.

In: Scripta Materialia, Vol. 108, 10717, 01.11.2015, p. 156-159.

Research output: Contribution to journal › Article › peer-review

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abstract = "Impurity segregation at the interface between β-Nb precipitates and α-Zr matrix in Zr-2.5 wt.%Nb alloy was investigated by complementary analysis with positron annihilation spectroscopy (PAS) and atom probe tomography (APT). Fe segregation and Fe-decorated defects were found at the interface. PAS also suggested that Fe was segregated to a concentration of several tens of percent at a local region at the interface, which is approximately one order of magnitude higher than APT and difficult to observe directly even using APT.",

keywords = "Atom probe tomography, Impurity segregation, Positron annihilation spectroscopy, Precipitate interface, Zirconium alloy",

author = "T. Toyama and Y. Matsukawa and K. Saito and Y. Satoh and H. Abe and Y. Shinohara and Y. Nagai",

note = "Funding Information: The authors thank Mitsubishi Nuclear Fuel Co. Ltd for supplying the sample. This work was partially supported by Grants-in-Aid for Scientific Research (Nos. 24246155 and 26709073 ) and Technology and the Strategic Promotion Program for Basic Nuclear Research (ID 210101 ) from the Ministry of Education, Culture, Sports, Science and Technology of Japan . Publisher Copyright: {\textcopyright} 2015 Acta Materialia Inc.",

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AU - Toyama, T.

AU - Matsukawa, Y.

AU - Saito, K.

AU - Satoh, Y.

AU - Abe, H.

AU - Shinohara, Y.

AU - Nagai, Y.

N1 - Funding Information: The authors thank Mitsubishi Nuclear Fuel Co. Ltd for supplying the sample. This work was partially supported by Grants-in-Aid for Scientific Research (Nos. 24246155 and 26709073 ) and Technology and the Strategic Promotion Program for Basic Nuclear Research (ID 210101 ) from the Ministry of Education, Culture, Sports, Science and Technology of Japan . Publisher Copyright: © 2015 Acta Materialia Inc.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - Impurity segregation at the interface between β-Nb precipitates and α-Zr matrix in Zr-2.5 wt.%Nb alloy was investigated by complementary analysis with positron annihilation spectroscopy (PAS) and atom probe tomography (APT). Fe segregation and Fe-decorated defects were found at the interface. PAS also suggested that Fe was segregated to a concentration of several tens of percent at a local region at the interface, which is approximately one order of magnitude higher than APT and difficult to observe directly even using APT.

AB - Impurity segregation at the interface between β-Nb precipitates and α-Zr matrix in Zr-2.5 wt.%Nb alloy was investigated by complementary analysis with positron annihilation spectroscopy (PAS) and atom probe tomography (APT). Fe segregation and Fe-decorated defects were found at the interface. PAS also suggested that Fe was segregated to a concentration of several tens of percent at a local region at the interface, which is approximately one order of magnitude higher than APT and difficult to observe directly even using APT.

KW - Atom probe tomography

KW - Impurity segregation

KW - Positron annihilation spectroscopy

KW - Precipitate interface

KW - Zirconium alloy

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EP - 159

JO - Scripta Materialia

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Microstructural analysis of impurity segregation around β-Nb precipitates in Zr-Nb alloy using positron annihilation spectroscopy and atom probe tomography

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Keywords

ASJC Scopus subject areas

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