Atomic configurations of various kinds of structural intergrowth in the polytypic M2B-type boride precipitated in the Ni-based superalloy

X. B. Hu; Y. L. Zhu; X. H. Shao; H. Y. Niu; L. Z. Zhou; X. L. Ma

doi:10.1016/j.actamat.2015.08.025

Atomic configurations of various kinds of structural intergrowth in the polytypic M₂B-type boride precipitated in the Ni-based superalloy

X. B. Hu, Y. L. Zhu, X. H. Shao, H. Y. Niu, L. Z. Zhou, X. L. Ma^*

^*Corresponding author for this work

NUANCE - Atomic and Nanoscale Characterization Experimental Center

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

19 Scopus citations

Abstract

The heavily faulted M₂B-type borides precipitated in the long-term aging Ni-based superalloys with B addition are comprehensively studied at an atomic scale. By means of high angle annular dark field (HAADF) imaging technique in the aberration corrected scanning transmission electron microscope (STEM), atomic configurations of various kinds of structural intergrowth in the profoundly faulted M₂B phase are directly imaged. The polytypic M₂B phase is mainly composed of C16, C_b and C_a structural variants, in which planar defects and the resultant long period stacking order (LPSO) structure are identified. In combination of the advanced spectrometry imaging technique with density functional theory (DFT) calculations, it is proposed that the polytypic feature is attributed to the conservation of the basic polyhedron of anti-square prisms.

Original language	English (US)
Pages (from-to)	64-72
Number of pages	9
Journal	Acta Materialia
Volume	100
DOIs	https://doi.org/10.1016/j.actamat.2015.08.025
State	Published - Nov 1 2015

Keywords

Aberration corrected transmission electron microscope
Atomic configurations
Ni-based superalloy
Polytypic MB-type boride
Structural intergrowth

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2015.08.025

Cite this

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title = "Atomic configurations of various kinds of structural intergrowth in the polytypic M2B-type boride precipitated in the Ni-based superalloy",

abstract = "The heavily faulted M2B-type borides precipitated in the long-term aging Ni-based superalloys with B addition are comprehensively studied at an atomic scale. By means of high angle annular dark field (HAADF) imaging technique in the aberration corrected scanning transmission electron microscope (STEM), atomic configurations of various kinds of structural intergrowth in the profoundly faulted M2B phase are directly imaged. The polytypic M2B phase is mainly composed of C16, Cb and Ca structural variants, in which planar defects and the resultant long period stacking order (LPSO) structure are identified. In combination of the advanced spectrometry imaging technique with density functional theory (DFT) calculations, it is proposed that the polytypic feature is attributed to the conservation of the basic polyhedron of anti-square prisms.",

keywords = "Aberration corrected transmission electron microscope, Atomic configurations, Ni-based superalloy, Polytypic MB-type boride, Structural intergrowth",

author = "Hu, {X. B.} and Zhu, {Y. L.} and Shao, {X. H.} and Niu, {H. Y.} and Zhou, {L. Z.} and Ma, {X. L.}",

note = "Funding Information: This work is supported by the National Natural Foundation of China (No. 11327901 ) and Ministry of Science & Technology of China ( 2010CB631206 and 2009CB623705 ). We are grateful to Mr. J. Wang for bulk sample preparation, to Mr. B. Wu and Mr. L.X. Yang for technical support at Titan platform, and to Dr. Y.L. Tang and Dr. Z.B. Yu for useful discussions. Publisher Copyright: {\textcopyright} 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

year = "2015",

month = nov,

day = "1",

doi = "10.1016/j.actamat.2015.08.025",

language = "English (US)",

volume = "100",

pages = "64--72",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Atomic configurations of various kinds of structural intergrowth in the polytypic M2B-type boride precipitated in the Ni-based superalloy

AU - Hu, X. B.

AU - Zhu, Y. L.

AU - Shao, X. H.

AU - Niu, H. Y.

AU - Zhou, L. Z.

AU - Ma, X. L.

N1 - Funding Information: This work is supported by the National Natural Foundation of China (No. 11327901 ) and Ministry of Science & Technology of China ( 2010CB631206 and 2009CB623705 ). We are grateful to Mr. J. Wang for bulk sample preparation, to Mr. B. Wu and Mr. L.X. Yang for technical support at Titan platform, and to Dr. Y.L. Tang and Dr. Z.B. Yu for useful discussions. Publisher Copyright: © 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - The heavily faulted M2B-type borides precipitated in the long-term aging Ni-based superalloys with B addition are comprehensively studied at an atomic scale. By means of high angle annular dark field (HAADF) imaging technique in the aberration corrected scanning transmission electron microscope (STEM), atomic configurations of various kinds of structural intergrowth in the profoundly faulted M2B phase are directly imaged. The polytypic M2B phase is mainly composed of C16, Cb and Ca structural variants, in which planar defects and the resultant long period stacking order (LPSO) structure are identified. In combination of the advanced spectrometry imaging technique with density functional theory (DFT) calculations, it is proposed that the polytypic feature is attributed to the conservation of the basic polyhedron of anti-square prisms.

AB - The heavily faulted M2B-type borides precipitated in the long-term aging Ni-based superalloys with B addition are comprehensively studied at an atomic scale. By means of high angle annular dark field (HAADF) imaging technique in the aberration corrected scanning transmission electron microscope (STEM), atomic configurations of various kinds of structural intergrowth in the profoundly faulted M2B phase are directly imaged. The polytypic M2B phase is mainly composed of C16, Cb and Ca structural variants, in which planar defects and the resultant long period stacking order (LPSO) structure are identified. In combination of the advanced spectrometry imaging technique with density functional theory (DFT) calculations, it is proposed that the polytypic feature is attributed to the conservation of the basic polyhedron of anti-square prisms.

KW - Aberration corrected transmission electron microscope

KW - Atomic configurations

KW - Ni-based superalloy

KW - Polytypic MB-type boride

KW - Structural intergrowth

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