Effect of growth rate on rod spacing and undercooling of Bridgman-grown Si-TaSi2 eutectic in situ composite

Xinyu Yang; Jun Zhang; Haijun Su; Ziqi Jie; Lin Liu; Hengzhi Fu

doi:10.1016/j.jallcom.2012.11.014

Effect of growth rate on rod spacing and undercooling of Bridgman-grown Si-TaSi₂ eutectic in situ composite

Xinyu Yang, Jun Zhang, Haijun Su, Ziqi Jie, Lin Liu, Hengzhi Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

12 Scopus citations

Abstract

Directionally solidified Si-6 wt.%TaSi₂ eutectic alloy has been studied to characterize the variation of inter-rod spacing at different growth rates (V = 6-200 μm/s) with a constant temperature gradient (210 K/cm). Statistical distributions of inter-rod spacings at each solidification rate are determined. It is confirmed that the relationship between inter-rod spacing and solidification rate obeys the Magnin-Kurz model, and the theoretical value of λa2V = 5435.6 μm³/s (λ_a is the average inter-rod spacing) approximately equals to the experimental value of λa2V^1.06 = 5343.6 μm^3.06/s. For the Si-TaSi ₂ system, the operating parameter φ is a function of the solidification rate due to the transition of the TaSi₂ phase from facet to nonfacet, and as the solidification rate increases the kinetic undercooling cannot be ignored.

Original language	English
Pages (from-to)	643-648
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	551
DOIs	https://doi.org/10.1016/j.jallcom.2012.11.014
State	Published - 25 Feb 2013

Keywords

Composite materials
Crystal growth
Microstructure
Scanning electron microscopy

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10.1016/j.jallcom.2012.11.014

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@article{67a691c5b63249f6b81b14be3cf8fa66,

title = "Effect of growth rate on rod spacing and undercooling of Bridgman-grown Si-TaSi2 eutectic in situ composite",

abstract = "Directionally solidified Si-6 wt.%TaSi2 eutectic alloy has been studied to characterize the variation of inter-rod spacing at different growth rates (V = 6-200 μm/s) with a constant temperature gradient (210 K/cm). Statistical distributions of inter-rod spacings at each solidification rate are determined. It is confirmed that the relationship between inter-rod spacing and solidification rate obeys the Magnin-Kurz model, and the theoretical value of λa2V = 5435.6 μm3/s (λa is the average inter-rod spacing) approximately equals to the experimental value of λa2V1.06 = 5343.6 μm3.06/s. For the Si-TaSi 2 system, the operating parameter φ is a function of the solidification rate due to the transition of the TaSi2 phase from facet to nonfacet, and as the solidification rate increases the kinetic undercooling cannot be ignored.",

keywords = "Composite materials, Crystal growth, Microstructure, Scanning electron microscopy",

author = "Xinyu Yang and Jun Zhang and Haijun Su and Ziqi Jie and Lin Liu and Hengzhi Fu",

year = "2013",

month = feb,

day = "25",

doi = "10.1016/j.jallcom.2012.11.014",

language = "英语",

volume = "551",

pages = "643--648",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of growth rate on rod spacing and undercooling of Bridgman-grown Si-TaSi2 eutectic in situ composite

AU - Yang, Xinyu

AU - Zhang, Jun

AU - Su, Haijun

AU - Jie, Ziqi

AU - Liu, Lin

AU - Fu, Hengzhi

PY - 2013/2/25

Y1 - 2013/2/25

N2 - Directionally solidified Si-6 wt.%TaSi2 eutectic alloy has been studied to characterize the variation of inter-rod spacing at different growth rates (V = 6-200 μm/s) with a constant temperature gradient (210 K/cm). Statistical distributions of inter-rod spacings at each solidification rate are determined. It is confirmed that the relationship between inter-rod spacing and solidification rate obeys the Magnin-Kurz model, and the theoretical value of λa2V = 5435.6 μm3/s (λa is the average inter-rod spacing) approximately equals to the experimental value of λa2V1.06 = 5343.6 μm3.06/s. For the Si-TaSi 2 system, the operating parameter φ is a function of the solidification rate due to the transition of the TaSi2 phase from facet to nonfacet, and as the solidification rate increases the kinetic undercooling cannot be ignored.

AB - Directionally solidified Si-6 wt.%TaSi2 eutectic alloy has been studied to characterize the variation of inter-rod spacing at different growth rates (V = 6-200 μm/s) with a constant temperature gradient (210 K/cm). Statistical distributions of inter-rod spacings at each solidification rate are determined. It is confirmed that the relationship between inter-rod spacing and solidification rate obeys the Magnin-Kurz model, and the theoretical value of λa2V = 5435.6 μm3/s (λa is the average inter-rod spacing) approximately equals to the experimental value of λa2V1.06 = 5343.6 μm3.06/s. For the Si-TaSi 2 system, the operating parameter φ is a function of the solidification rate due to the transition of the TaSi2 phase from facet to nonfacet, and as the solidification rate increases the kinetic undercooling cannot be ignored.

KW - Composite materials

KW - Crystal growth

KW - Microstructure

KW - Scanning electron microscopy

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U2 - 10.1016/j.jallcom.2012.11.014

DO - 10.1016/j.jallcom.2012.11.014

M3 - 文章

AN - SCOPUS:84870991675

SN - 0925-8388

VL - 551

SP - 643

EP - 648

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Effect of growth rate on rod spacing and undercooling of Bridgman-grown Si-TaSi₂ eutectic in situ composite

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Keywords

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