In situ observation of solidification and subsequent evolution of Ni-Si eutectics

Lu Chung Chuang; Kensaku Maeda; Haruhiko Morito; Kozo Fujiwara

doi:10.1016/j.scriptamat.2022.114513

In situ observation of solidification and subsequent evolution of Ni-Si eutectics

Lu Chung Chuang, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara

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

Abstract

Eutectic growth of Ni-Si alloy with a composition of Ni₄₄Si₅₆ was observed in situ during directional solidification. Lamellar structure was evident behind the solidifying interface, which indicates that the two intermetallic phases, NiSi and NiSi₂, generated a regular eutectic. The lamellae spacing was approximately 9.8 μm at a growth rate of 149.6 μm s⁻¹. The phase boundaries migrated rapidly during the cooling stage and the lamellae enlarged significantly, which suggests that the lamellae spacing measured after the solidification may not be accurate for obtaining the relationship between the growth rate and the lamellae spacing. The in situ observation provides a promising way to obtain the exact eutectic spacing of Ni-Si eutectics.

Original language	English
Article number	114513
Journal	Scripta Materialia
Volume	211
DOIs	https://doi.org/10.1016/j.scriptamat.2022.114513
Publication status	Published - 2022 Apr 1

Keywords

Directional solidification
Eutectic growth
In situ observation
Ni-Si alloy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2022.114513

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title = "In situ observation of solidification and subsequent evolution of Ni-Si eutectics",

abstract = "Eutectic growth of Ni-Si alloy with a composition of Ni44Si56 was observed in situ during directional solidification. Lamellar structure was evident behind the solidifying interface, which indicates that the two intermetallic phases, NiSi and NiSi2, generated a regular eutectic. The lamellae spacing was approximately 9.8 μm at a growth rate of 149.6 μm s−1. The phase boundaries migrated rapidly during the cooling stage and the lamellae enlarged significantly, which suggests that the lamellae spacing measured after the solidification may not be accurate for obtaining the relationship between the growth rate and the lamellae spacing. The in situ observation provides a promising way to obtain the exact eutectic spacing of Ni-Si eutectics.",

keywords = "Directional solidification, Eutectic growth, In situ observation, Ni-Si alloy",

author = "Chuang, {Lu Chung} and Kensaku Maeda and Haruhiko Morito and Kozo Fujiwara",

note = "Funding Information: This work was supported by a KAKENHI Grant-in-Aid for Scientific Research (A) (No. 21H04658 ) and Research Activity Start-up 2021 (No. 21K20343 ) from the Japan Society for the Promotion of Science (JSPS). Publisher Copyright: {\textcopyright} 2022",

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doi = "10.1016/j.scriptamat.2022.114513",

language = "English",

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T1 - In situ observation of solidification and subsequent evolution of Ni-Si eutectics

AU - Chuang, Lu Chung

AU - Maeda, Kensaku

AU - Morito, Haruhiko

AU - Fujiwara, Kozo

N1 - Funding Information: This work was supported by a KAKENHI Grant-in-Aid for Scientific Research (A) (No. 21H04658 ) and Research Activity Start-up 2021 (No. 21K20343 ) from the Japan Society for the Promotion of Science (JSPS). Publisher Copyright: © 2022

PY - 2022/4/1

Y1 - 2022/4/1

N2 - Eutectic growth of Ni-Si alloy with a composition of Ni44Si56 was observed in situ during directional solidification. Lamellar structure was evident behind the solidifying interface, which indicates that the two intermetallic phases, NiSi and NiSi2, generated a regular eutectic. The lamellae spacing was approximately 9.8 μm at a growth rate of 149.6 μm s−1. The phase boundaries migrated rapidly during the cooling stage and the lamellae enlarged significantly, which suggests that the lamellae spacing measured after the solidification may not be accurate for obtaining the relationship between the growth rate and the lamellae spacing. The in situ observation provides a promising way to obtain the exact eutectic spacing of Ni-Si eutectics.

AB - Eutectic growth of Ni-Si alloy with a composition of Ni44Si56 was observed in situ during directional solidification. Lamellar structure was evident behind the solidifying interface, which indicates that the two intermetallic phases, NiSi and NiSi2, generated a regular eutectic. The lamellae spacing was approximately 9.8 μm at a growth rate of 149.6 μm s−1. The phase boundaries migrated rapidly during the cooling stage and the lamellae enlarged significantly, which suggests that the lamellae spacing measured after the solidification may not be accurate for obtaining the relationship between the growth rate and the lamellae spacing. The in situ observation provides a promising way to obtain the exact eutectic spacing of Ni-Si eutectics.

KW - Directional solidification

KW - Eutectic growth

KW - In situ observation

KW - Ni-Si alloy

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U2 - 10.1016/j.scriptamat.2022.114513

DO - 10.1016/j.scriptamat.2022.114513

M3 - Article

AN - SCOPUS:85122962691

SN - 1359-6462

VL - 211

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114513

ER -

In situ observation of solidification and subsequent evolution of Ni-Si eutectics

Abstract

Keywords

ASJC Scopus subject areas

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