The microstructure and mechanical performance of C/C-SiCf/SiC composite joints brazed by Si-10Zr eutectic alloy

Zongjing He; Huining Xu; Chun Li; Xiaoqing Si; Junlei Qi; Jian Cao

doi:10.1007/s40194-022-01446-7

The microstructure and mechanical performance of C/C-SiC_f/SiC composite joints brazed by Si-10Zr eutectic alloy

Zongjing He
, Huining Xu^*
, Chun Li
, Xiaoqing Si
, Junlei Qi
, Jian Cao

^*Corresponding author for this work

School of Materials Science and Engineering

School of Transportation Science and Engineering, Harbin Institute of Technology

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

6 Scopus citations

Abstract

The real-time wetting behavior of the Si-10Zr (at. %) eutectic alloy over the SiC_f/SiC composites was investigated for the first time. The brazing of C/C composites and SiC_f/SiC composites using the Si-10Zr filler alloy under a range of time was studied. The interfacial microstructure between the liquid alloy and the SiC_f/SiC composites was determined. The joint microstructure, mechanical performance, and fractures of the C/C and C/C-SiC_f/SiC joints were analyzed. The Si-Zr melt showed a contact angle of only 10° at 1480 ℃, owing to good wettability and abundant infiltration into the porous SiC_f/SiC composites. With the extension of holding time, the Si-10Zr alloy reacted with the two substrates and formed SiC interfacial layers. An optimal fracture mode combined the Si-ZrSi₂ filler, composites, and the SiC reaction layers.

Original language	English
Pages (from-to)	525-531
Number of pages	7
Journal	Welding in the World, Le Soudage Dans Le Monde
Volume	67
Issue number	2
DOIs	https://doi.org/10.1007/s40194-022-01446-7
State	Published - Feb 2023

Keywords

Brazing
Joint
Mechanical performance
Microstructure
Si-Zr alloy

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10.1007/s40194-022-01446-7

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title = "The microstructure and mechanical performance of C/C-SiCf/SiC composite joints brazed by Si-10Zr eutectic alloy",

abstract = "The real-time wetting behavior of the Si-10Zr (at. \%) eutectic alloy over the SiCf/SiC composites was investigated for the first time. The brazing of C/C composites and SiCf/SiC composites using the Si-10Zr filler alloy under a range of time was studied. The interfacial microstructure between the liquid alloy and the SiCf/SiC composites was determined. The joint microstructure, mechanical performance, and fractures of the C/C and C/C-SiCf/SiC joints were analyzed. The Si-Zr melt showed a contact angle of only 10° at 1480 ℃, owing to good wettability and abundant infiltration into the porous SiCf/SiC composites. With the extension of holding time, the Si-10Zr alloy reacted with the two substrates and formed SiC interfacial layers. An optimal fracture mode combined the Si-ZrSi2 filler, composites, and the SiC reaction layers.",

keywords = "Brazing, Joint, Mechanical performance, Microstructure, Si-Zr alloy",

author = "Zongjing He and Huining Xu and Chun Li and Xiaoqing Si and Junlei Qi and Jian Cao",

note = "Publisher Copyright: {\textcopyright} 2022, International Institute of Welding.",

year = "2023",

month = feb,

doi = "10.1007/s40194-022-01446-7",

language = "英语",

volume = "67",

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T1 - The microstructure and mechanical performance of C/C-SiCf/SiC composite joints brazed by Si-10Zr eutectic alloy

AU - He, Zongjing

AU - Xu, Huining

AU - Li, Chun

AU - Si, Xiaoqing

AU - Qi, Junlei

AU - Cao, Jian

PY - 2023/2

Y1 - 2023/2

N2 - The real-time wetting behavior of the Si-10Zr (at. %) eutectic alloy over the SiCf/SiC composites was investigated for the first time. The brazing of C/C composites and SiCf/SiC composites using the Si-10Zr filler alloy under a range of time was studied. The interfacial microstructure between the liquid alloy and the SiCf/SiC composites was determined. The joint microstructure, mechanical performance, and fractures of the C/C and C/C-SiCf/SiC joints were analyzed. The Si-Zr melt showed a contact angle of only 10° at 1480 ℃, owing to good wettability and abundant infiltration into the porous SiCf/SiC composites. With the extension of holding time, the Si-10Zr alloy reacted with the two substrates and formed SiC interfacial layers. An optimal fracture mode combined the Si-ZrSi2 filler, composites, and the SiC reaction layers.

AB - The real-time wetting behavior of the Si-10Zr (at. %) eutectic alloy over the SiCf/SiC composites was investigated for the first time. The brazing of C/C composites and SiCf/SiC composites using the Si-10Zr filler alloy under a range of time was studied. The interfacial microstructure between the liquid alloy and the SiCf/SiC composites was determined. The joint microstructure, mechanical performance, and fractures of the C/C and C/C-SiCf/SiC joints were analyzed. The Si-Zr melt showed a contact angle of only 10° at 1480 ℃, owing to good wettability and abundant infiltration into the porous SiCf/SiC composites. With the extension of holding time, the Si-10Zr alloy reacted with the two substrates and formed SiC interfacial layers. An optimal fracture mode combined the Si-ZrSi2 filler, composites, and the SiC reaction layers.

KW - Brazing

KW - Joint

KW - Mechanical performance

KW - Microstructure

KW - Si-Zr alloy

UR - https://www.scopus.com/pages/publications/85145091287

U2 - 10.1007/s40194-022-01446-7

DO - 10.1007/s40194-022-01446-7

M3 - 文章

AN - SCOPUS:85145091287

SN - 0043-2288

VL - 67

SP - 525

EP - 531

JO - Welding in the World, Le Soudage Dans Le Monde

JF - Welding in the World, Le Soudage Dans Le Monde

IS - 2

ER -

The microstructure and mechanical performance of C/C-SiC_f/SiC composite joints brazed by Si-10Zr eutectic alloy

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Keywords

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