Directionally solidified microstructure of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy

P. Guan; X. P. Guo; X. Ding; J. Zhang; L. M. Gao; K. Kusabiraki

Directionally solidified microstructure of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy

P. Guan
, X. P. Guo
, X. Ding
, J. Zhang
, L. M. Gao
, K. Kusabiraki

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian
University of Toyama

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

34 Scopus citations

Abstract

The directionally solidified samples of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy have been prepared with the use of an electron beam floating zone melting (EBFZM) furnace, and their microstructural characteristics have been analyzed. All the primary dendrites of Nb solid solution (Nb_ss), eutectic colonies of Nb_ss plus (Nb, Ti)₃Si/(Nb, Ti)₅Si₃ and chains of (Nb, Ti)₃Si/(Nb, Ti)₅Si₃ plates align along the growth direction of the samples. With increasing of the withdrawing rate, the microstructure is refined, and the amounts of Nb_ss+(Nb, Ti)₃Si/(Nb, Ti)₅Si₃ eutectic colonies and (Nb, Ti)₃Si/(Nb, Ti)₅Si₃ plates increase. There appear nodes in the (Nb, Ti)₃Si/(Nb, Ti)₅Si₃ plates.

Original language	English
Pages (from-to)	450-454
Number of pages	5
Journal	Acta Metallurgica Sinica (English Letters)
Volume	17
Issue number	4
State	Published - Aug 2004

Keywords

In situ composite
Microstructural evolution
Nb-Si based alloy
Ultra-high temperature alloy
Unidirectional solidification

Cite this

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title = "Directionally solidified microstructure of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy",

abstract = "The directionally solidified samples of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy have been prepared with the use of an electron beam floating zone melting (EBFZM) furnace, and their microstructural characteristics have been analyzed. All the primary dendrites of Nb solid solution (Nbss), eutectic colonies of Nbss plus (Nb, Ti)3Si/(Nb, Ti)5Si3 and chains of (Nb, Ti)3Si/(Nb, Ti)5Si3 plates align along the growth direction of the samples. With increasing of the withdrawing rate, the microstructure is refined, and the amounts of Nbss+(Nb, Ti)3Si/(Nb, Ti)5Si3 eutectic colonies and (Nb, Ti)3Si/(Nb, Ti)5Si3 plates increase. There appear nodes in the (Nb, Ti)3Si/(Nb, Ti)5Si3 plates.",

keywords = "In situ composite, Microstructural evolution, Nb-Si based alloy, Ultra-high temperature alloy, Unidirectional solidification",

author = "P. Guan and Guo, \{X. P.\} and X. Ding and J. Zhang and Gao, \{L. M.\} and K. Kusabiraki",

year = "2004",

month = aug,

language = "英语",

volume = "17",

pages = "450--454",

journal = "Acta Metallurgica Sinica (English Letters)",

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TY - JOUR

T1 - Directionally solidified microstructure of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy

AU - Guan, P.

AU - Guo, X. P.

AU - Ding, X.

AU - Zhang, J.

AU - Gao, L. M.

AU - Kusabiraki, K.

PY - 2004/8

Y1 - 2004/8

N2 - The directionally solidified samples of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy have been prepared with the use of an electron beam floating zone melting (EBFZM) furnace, and their microstructural characteristics have been analyzed. All the primary dendrites of Nb solid solution (Nbss), eutectic colonies of Nbss plus (Nb, Ti)3Si/(Nb, Ti)5Si3 and chains of (Nb, Ti)3Si/(Nb, Ti)5Si3 plates align along the growth direction of the samples. With increasing of the withdrawing rate, the microstructure is refined, and the amounts of Nbss+(Nb, Ti)3Si/(Nb, Ti)5Si3 eutectic colonies and (Nb, Ti)3Si/(Nb, Ti)5Si3 plates increase. There appear nodes in the (Nb, Ti)3Si/(Nb, Ti)5Si3 plates.

AB - The directionally solidified samples of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy have been prepared with the use of an electron beam floating zone melting (EBFZM) furnace, and their microstructural characteristics have been analyzed. All the primary dendrites of Nb solid solution (Nbss), eutectic colonies of Nbss plus (Nb, Ti)3Si/(Nb, Ti)5Si3 and chains of (Nb, Ti)3Si/(Nb, Ti)5Si3 plates align along the growth direction of the samples. With increasing of the withdrawing rate, the microstructure is refined, and the amounts of Nbss+(Nb, Ti)3Si/(Nb, Ti)5Si3 eutectic colonies and (Nb, Ti)3Si/(Nb, Ti)5Si3 plates increase. There appear nodes in the (Nb, Ti)3Si/(Nb, Ti)5Si3 plates.

KW - In situ composite

KW - Microstructural evolution

KW - Nb-Si based alloy

KW - Ultra-high temperature alloy

KW - Unidirectional solidification

UR - https://www.scopus.com/pages/publications/7944236982

M3 - 文章

AN - SCOPUS:7944236982

SN - 1006-7191

VL - 17

SP - 450

EP - 454

JO - Acta Metallurgica Sinica (English Letters)

JF - Acta Metallurgica Sinica (English Letters)

IS - 4

ER -

Directionally solidified microstructure of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy

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Keywords

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