Microstructure of the Nb-Si based multicomponent alloy by electromagnetic cold crucible directional solidifcation

Hongsheng Ding; Yuncheng Yan; Yongwang Kang; Jinxia Song; Ruirun Chen; Jingjie Guo

Microstructure of the Nb-Si based multicomponent alloy by electromagnetic cold crucible directional solidifcation

Hongsheng Ding
, Yuncheng Yan^*
, Yongwang Kang
, Jinxia Song
, Ruirun Chen
, Jingjie Guo

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
Beijing Institute of Aeronautical Materials

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

1 Scopus citations

Abstract

The Nb-24Ti-12Si-4Cr-4Al-2Hf (at%) alloy was prepared by electromagnetic cold crucible directional solidifcation. The XRD analysis shows that the initial growth zone (IGZ) and the steady-state growth region (SSGR) are composed of priamry Nbss, β-Nb₅Si₃ and γ-Nb₅Si₃. The BFI and SADP indicate that the hexagonal faceted silicide is γ-Nb₅Si₃ and the rod-like or sheet silicide is β-Nb₅Si₃. The BEI illustrates that both IGZ and SSGR consist of primary Nbss and Nbss+Nb₅Si₃ eutectic, including Nbss+β-Nb₅Si₃ and Nbss+γ-Nb₅Si₃ eutectic. In terms of morphology, two types of cellular eutectic coexist in the transverse microstructure of IGZ, but three types of cellular eutectic are present in the transverse microstructure of SSGR. The microstructure in SSGR is finer and distributed more evenly compared with that in IGZ. The growth of γ-Nb₅Si₃ in SSGR is inhibited.

Original language	English
Pages (from-to)	2419-2424
Number of pages	6
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	43
Issue number	10
State	Published - 1 Oct 2014

Keywords

Cellular eutectic
Electromagnetic cold crucible directional solidifcation
Faceted silicide
β-NbSi
γ-NbSi

Cite this

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title = "Microstructure of the Nb-Si based multicomponent alloy by electromagnetic cold crucible directional solidifcation",

abstract = "The Nb-24Ti-12Si-4Cr-4Al-2Hf (at\%) alloy was prepared by electromagnetic cold crucible directional solidifcation. The XRD analysis shows that the initial growth zone (IGZ) and the steady-state growth region (SSGR) are composed of priamry Nbss, β-Nb5Si3 and γ-Nb5Si3. The BFI and SADP indicate that the hexagonal faceted silicide is γ-Nb5Si3 and the rod-like or sheet silicide is β-Nb5Si3. The BEI illustrates that both IGZ and SSGR consist of primary Nbss and Nbss+Nb5Si3 eutectic, including Nbss+β-Nb5Si3 and Nbss+γ-Nb5Si3 eutectic. In terms of morphology, two types of cellular eutectic coexist in the transverse microstructure of IGZ, but three types of cellular eutectic are present in the transverse microstructure of SSGR. The microstructure in SSGR is finer and distributed more evenly compared with that in IGZ. The growth of γ-Nb5Si3 in SSGR is inhibited.",

keywords = "Cellular eutectic, Electromagnetic cold crucible directional solidifcation, Faceted silicide, β-NbSi, γ-NbSi",

author = "Hongsheng Ding and Yuncheng Yan and Yongwang Kang and Jinxia Song and Ruirun Chen and Jingjie Guo",

year = "2014",

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language = "英语",

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TY - JOUR

T1 - Microstructure of the Nb-Si based multicomponent alloy by electromagnetic cold crucible directional solidifcation

AU - Ding, Hongsheng

AU - Yan, Yuncheng

AU - Kang, Yongwang

AU - Song, Jinxia

AU - Chen, Ruirun

AU - Guo, Jingjie

PY - 2014/10/1

Y1 - 2014/10/1

N2 - The Nb-24Ti-12Si-4Cr-4Al-2Hf (at%) alloy was prepared by electromagnetic cold crucible directional solidifcation. The XRD analysis shows that the initial growth zone (IGZ) and the steady-state growth region (SSGR) are composed of priamry Nbss, β-Nb5Si3 and γ-Nb5Si3. The BFI and SADP indicate that the hexagonal faceted silicide is γ-Nb5Si3 and the rod-like or sheet silicide is β-Nb5Si3. The BEI illustrates that both IGZ and SSGR consist of primary Nbss and Nbss+Nb5Si3 eutectic, including Nbss+β-Nb5Si3 and Nbss+γ-Nb5Si3 eutectic. In terms of morphology, two types of cellular eutectic coexist in the transverse microstructure of IGZ, but three types of cellular eutectic are present in the transverse microstructure of SSGR. The microstructure in SSGR is finer and distributed more evenly compared with that in IGZ. The growth of γ-Nb5Si3 in SSGR is inhibited.

AB - The Nb-24Ti-12Si-4Cr-4Al-2Hf (at%) alloy was prepared by electromagnetic cold crucible directional solidifcation. The XRD analysis shows that the initial growth zone (IGZ) and the steady-state growth region (SSGR) are composed of priamry Nbss, β-Nb5Si3 and γ-Nb5Si3. The BFI and SADP indicate that the hexagonal faceted silicide is γ-Nb5Si3 and the rod-like or sheet silicide is β-Nb5Si3. The BEI illustrates that both IGZ and SSGR consist of primary Nbss and Nbss+Nb5Si3 eutectic, including Nbss+β-Nb5Si3 and Nbss+γ-Nb5Si3 eutectic. In terms of morphology, two types of cellular eutectic coexist in the transverse microstructure of IGZ, but three types of cellular eutectic are present in the transverse microstructure of SSGR. The microstructure in SSGR is finer and distributed more evenly compared with that in IGZ. The growth of γ-Nb5Si3 in SSGR is inhibited.

KW - Cellular eutectic

KW - Electromagnetic cold crucible directional solidifcation

KW - Faceted silicide

KW - β-NbSi

KW - γ-NbSi

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M3 - 文章

AN - SCOPUS:84909989984

SN - 1002-185X

VL - 43

SP - 2419

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JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 10

ER -

Microstructure of the Nb-Si based multicomponent alloy by electromagnetic cold crucible directional solidifcation

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Keywords

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