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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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.",

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AU - Saito, K.

AU - Satoh, Y.

AU - Abe, H.

AU - Shinohara, Y.

AU - Nagai, Y.

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KW - Impurity segregation

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KW - Precipitate interface

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