Eutectoid decomposition of βNb5Si3 → αNb5Si3 + Nbss in Nbss/Nb5Si3 in-situ composites revealed by electron microscopy

Xiao Ma; Xiping Guo; Maosen Fu

doi:10.1016/j.matchar.2022.112098

Eutectoid decomposition of βNb₅Si₃ → αNb₅Si₃ + Nbss in Nbss/Nb₅Si₃ in-situ composites revealed by electron microscopy

Xiao Ma, Xiping Guo, Maosen Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

4 Scopus citations

Abstract

Eutectoid decomposition of βNb₅Si₃ → αNb₅Si₃ + Nbss in Nbss/Nb₅Si₃ in-situ composites has been systematically investigated by electron microscopy. βNb₅Si₃ would transform into different αNb₅Si₃ orientation variants around 1075 °C. There is no inherent orientation relationship (OR) between βNb₅Si₃ and αNb₅Si₃, which might be regulated by the diffusive nature of the transformation. Numerous Nbss precipitates would form within αNb₅Si₃ with crystallographic OR of <001>_Nb// < 001>_α. This transformation is promoted by formation of dislocations and the diffusion of Nb at elevated temperatures, which will propagate from Nbss/βNb₅Si₃ interfaces to the interior of βNb₅Si₃ grains.

Original language	English
Article number	112098
Journal	Materials Characterization
Volume	191
DOIs	https://doi.org/10.1016/j.matchar.2022.112098
State	Published - Sep 2022

Keywords

Electron microscopy
Eutectoid decomposition
Nb/NbSi in-situ composites
NbSi silicide
Nbss precipitates

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10.1016/j.matchar.2022.112098

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title = "Eutectoid decomposition of βNb5Si3 → αNb5Si3 + Nbss in Nbss/Nb5Si3 in-situ composites revealed by electron microscopy",

abstract = "Eutectoid decomposition of βNb5Si3 → αNb5Si3 + Nbss in Nbss/Nb5Si3 in-situ composites has been systematically investigated by electron microscopy. βNb5Si3 would transform into different αNb5Si3 orientation variants around 1075 °C. There is no inherent orientation relationship (OR) between βNb5Si3 and αNb5Si3, which might be regulated by the diffusive nature of the transformation. Numerous Nbss precipitates would form within αNb5Si3 with crystallographic OR of <001>Nb// < 001>α. This transformation is promoted by formation of dislocations and the diffusion of Nb at elevated temperatures, which will propagate from Nbss/βNb5Si3 interfaces to the interior of βNb5Si3 grains.",

keywords = "Electron microscopy, Eutectoid decomposition, Nb/NbSi in-situ composites, NbSi silicide, Nbss precipitates",

author = "Xiao Ma and Xiping Guo and Maosen Fu",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Inc.",

year = "2022",

month = sep,

doi = "10.1016/j.matchar.2022.112098",

language = "英语",

volume = "191",

journal = "Materials Characterization",

issn = "1044-5803",

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T1 - Eutectoid decomposition of βNb5Si3 → αNb5Si3 + Nbss in Nbss/Nb5Si3 in-situ composites revealed by electron microscopy

AU - Ma, Xiao

AU - Guo, Xiping

AU - Fu, Maosen

PY - 2022/9

Y1 - 2022/9

N2 - Eutectoid decomposition of βNb5Si3 → αNb5Si3 + Nbss in Nbss/Nb5Si3 in-situ composites has been systematically investigated by electron microscopy. βNb5Si3 would transform into different αNb5Si3 orientation variants around 1075 °C. There is no inherent orientation relationship (OR) between βNb5Si3 and αNb5Si3, which might be regulated by the diffusive nature of the transformation. Numerous Nbss precipitates would form within αNb5Si3 with crystallographic OR of <001>Nb// < 001>α. This transformation is promoted by formation of dislocations and the diffusion of Nb at elevated temperatures, which will propagate from Nbss/βNb5Si3 interfaces to the interior of βNb5Si3 grains.

AB - Eutectoid decomposition of βNb5Si3 → αNb5Si3 + Nbss in Nbss/Nb5Si3 in-situ composites has been systematically investigated by electron microscopy. βNb5Si3 would transform into different αNb5Si3 orientation variants around 1075 °C. There is no inherent orientation relationship (OR) between βNb5Si3 and αNb5Si3, which might be regulated by the diffusive nature of the transformation. Numerous Nbss precipitates would form within αNb5Si3 with crystallographic OR of <001>Nb// < 001>α. This transformation is promoted by formation of dislocations and the diffusion of Nb at elevated temperatures, which will propagate from Nbss/βNb5Si3 interfaces to the interior of βNb5Si3 grains.

KW - Electron microscopy

KW - Eutectoid decomposition

KW - Nb/NbSi in-situ composites

KW - NbSi silicide

KW - Nbss precipitates

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U2 - 10.1016/j.matchar.2022.112098

DO - 10.1016/j.matchar.2022.112098

M3 - 文章

AN - SCOPUS:85134427549

SN - 1044-5803

VL - 191

JO - Materials Characterization

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ER -

Eutectoid decomposition of βNb₅Si₃ → αNb₅Si₃ + Nbss in Nbss/Nb₅Si₃ in-situ composites revealed by electron microscopy

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Keywords

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