The microstructure and properties of SiC/SiC-based composites fabricated by low-temperature melt infiltration of Al-Si alloy

Xiaoyu Cao; Xiaowei Yin; Xiaokang Ma; Xiaomeng Fan; Yanzhi Cai; Jianping Li; Laifei Cheng; Litong Zhang

doi:10.1016/j.ceramint.2016.03.126

The microstructure and properties of SiC/SiC-based composites fabricated by low-temperature melt infiltration of Al-Si alloy

Xiaoyu Cao, Xiaowei Yin, Xiaokang Ma, Xiaomeng Fan, Yanzhi Cai, Jianping Li, Laifei Cheng, Litong Zhang

School of Materials Sience and Engineering

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

20 Scopus citations

Abstract

Dense SiC/SiC-based composites were fabricated by introducing Ti₃Si(Al)C₂-based ceramics into Chemical Vapor Infiltration (CVI) fabricated porous SiC/SiC composites. For the purpose of reducing the damage to SiC fiber, the low-temperature melt infiltration of Al-Si alloy was utilized. The microstructure was observed, showing that the inter-bundle pores were filled by reaction-formed new phases and the porosity of SiC/SiC-based composites decreased to less than 5%. Owing to the densification of the matrix, higher thermal diffusivity was obtained compared with CVI fabricated SiC/SiC composites. The mechanical properties were also analyzed. The compressive strength and in-plane shear strength were 10.9% and 11.3% higher than those of CVI fabricated SiC/SiC composites, respectively.

Original language	English
Pages (from-to)	10144-10150
Number of pages	7
Journal	Ceramics International
Volume	42
Issue number	8
DOIs	https://doi.org/10.1016/j.ceramint.2016.03.126
State	Published - 1 Jun 2016

Keywords

Matrix modification
Mechanical property
SiC/SiC composites
Thermal diffusivity

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10.1016/j.ceramint.2016.03.126

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title = "The microstructure and properties of SiC/SiC-based composites fabricated by low-temperature melt infiltration of Al-Si alloy",

abstract = "Dense SiC/SiC-based composites were fabricated by introducing Ti3Si(Al)C2-based ceramics into Chemical Vapor Infiltration (CVI) fabricated porous SiC/SiC composites. For the purpose of reducing the damage to SiC fiber, the low-temperature melt infiltration of Al-Si alloy was utilized. The microstructure was observed, showing that the inter-bundle pores were filled by reaction-formed new phases and the porosity of SiC/SiC-based composites decreased to less than 5%. Owing to the densification of the matrix, higher thermal diffusivity was obtained compared with CVI fabricated SiC/SiC composites. The mechanical properties were also analyzed. The compressive strength and in-plane shear strength were 10.9% and 11.3% higher than those of CVI fabricated SiC/SiC composites, respectively.",

keywords = "Matrix modification, Mechanical property, SiC/SiC composites, Thermal diffusivity",

author = "Xiaoyu Cao and Xiaowei Yin and Xiaokang Ma and Xiaomeng Fan and Yanzhi Cai and Jianping Li and Laifei Cheng and Litong Zhang",

year = "2016",

month = jun,

day = "1",

doi = "10.1016/j.ceramint.2016.03.126",

language = "英语",

volume = "42",

pages = "10144--10150",

journal = "Ceramics International",

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TY - JOUR

T1 - The microstructure and properties of SiC/SiC-based composites fabricated by low-temperature melt infiltration of Al-Si alloy

AU - Cao, Xiaoyu

AU - Yin, Xiaowei

AU - Ma, Xiaokang

AU - Fan, Xiaomeng

AU - Cai, Yanzhi

AU - Li, Jianping

AU - Cheng, Laifei

AU - Zhang, Litong

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Dense SiC/SiC-based composites were fabricated by introducing Ti3Si(Al)C2-based ceramics into Chemical Vapor Infiltration (CVI) fabricated porous SiC/SiC composites. For the purpose of reducing the damage to SiC fiber, the low-temperature melt infiltration of Al-Si alloy was utilized. The microstructure was observed, showing that the inter-bundle pores were filled by reaction-formed new phases and the porosity of SiC/SiC-based composites decreased to less than 5%. Owing to the densification of the matrix, higher thermal diffusivity was obtained compared with CVI fabricated SiC/SiC composites. The mechanical properties were also analyzed. The compressive strength and in-plane shear strength were 10.9% and 11.3% higher than those of CVI fabricated SiC/SiC composites, respectively.

AB - Dense SiC/SiC-based composites were fabricated by introducing Ti3Si(Al)C2-based ceramics into Chemical Vapor Infiltration (CVI) fabricated porous SiC/SiC composites. For the purpose of reducing the damage to SiC fiber, the low-temperature melt infiltration of Al-Si alloy was utilized. The microstructure was observed, showing that the inter-bundle pores were filled by reaction-formed new phases and the porosity of SiC/SiC-based composites decreased to less than 5%. Owing to the densification of the matrix, higher thermal diffusivity was obtained compared with CVI fabricated SiC/SiC composites. The mechanical properties were also analyzed. The compressive strength and in-plane shear strength were 10.9% and 11.3% higher than those of CVI fabricated SiC/SiC composites, respectively.

KW - Matrix modification

KW - Mechanical property

KW - SiC/SiC composites

KW - Thermal diffusivity

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U2 - 10.1016/j.ceramint.2016.03.126

DO - 10.1016/j.ceramint.2016.03.126

M3 - 文章

AN - SCOPUS:84963705479

SN - 0272-8842

VL - 42

SP - 10144

EP - 10150

JO - Ceramics International

JF - Ceramics International

IS - 8

ER -

The microstructure and properties of SiC/SiC-based composites fabricated by low-temperature melt infiltration of Al-Si alloy

Abstract

Keywords

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