A study of interface reaction zone in a SiC fibre /Ti-17 composite

Yingwei Fan; Xiaorong Zhou

doi:10.1016/j.micron.2018.07.003

A study of interface reaction zone in a SiC fibre /Ti-17 composite

Yingwei Fan, Xiaorong Zhou

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Abstract

The interface reaction zone (RZ) in a unidirectional continuous carbon-coated SiC fibre reinforced Ti-17 titanium alloy composite is investigated. Micro-computed tomography (CT), scanning and transmission electron microscopy are employed to characterize the fibre/matrix interface. It is revealed that the interface RZ is a 400 nm thick titanium carbide (TiC) layer which is composed of two sublayers, a 60 nm thick fine-grained sublayer and an approximate 340 nm thick coarse-grained sublayer. The RZ is formed through chemical reaction between carbon coating on the SiC fibre surface and Ti, Zr and Sn in the alloy matrix. The reaction is controlled by atom diffusion occurring at the fibre/matrix interface. However, in the reaction process, Al, Cr and Mo in the matrix are rejected and piled up in front of the RZ on the matrix side. A structure model is proposed to describe the formation mechanism of the interface RZ.

Original language	English
Pages (from-to)	91-98
Number of pages	7
Journal	Micron
Volume	113
Early online date	9 Jul 2018
DOIs	https://doi.org/10.1016/j.micron.2018.07.003
Publication status	Published - Oct 2018

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title = "A study of interface reaction zone in a SiC fibre /Ti-17 composite",

abstract = "The interface reaction zone (RZ) in a unidirectional continuous carbon-coated SiC fibre reinforced Ti-17 titanium alloy composite is investigated. Micro-computed tomography (CT), scanning and transmission electron microscopy are employed to characterize the fibre/matrix interface. It is revealed that the interface RZ is a 400 nm thick titanium carbide (TiC) layer which is composed of two sublayers, a 60 nm thick fine-grained sublayer and an approximate 340 nm thick coarse-grained sublayer. The RZ is formed through chemical reaction between carbon coating on the SiC fibre surface and Ti, Zr and Sn in the alloy matrix. The reaction is controlled by atom diffusion occurring at the fibre/matrix interface. However, in the reaction process, Al, Cr and Mo in the matrix are rejected and piled up in front of the RZ on the matrix side. A structure model is proposed to describe the formation mechanism of the interface RZ.",

author = "Yingwei Fan and Xiaorong Zhou",

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doi = "10.1016/j.micron.2018.07.003",

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AU - Zhou, Xiaorong

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AB - The interface reaction zone (RZ) in a unidirectional continuous carbon-coated SiC fibre reinforced Ti-17 titanium alloy composite is investigated. Micro-computed tomography (CT), scanning and transmission electron microscopy are employed to characterize the fibre/matrix interface. It is revealed that the interface RZ is a 400 nm thick titanium carbide (TiC) layer which is composed of two sublayers, a 60 nm thick fine-grained sublayer and an approximate 340 nm thick coarse-grained sublayer. The RZ is formed through chemical reaction between carbon coating on the SiC fibre surface and Ti, Zr and Sn in the alloy matrix. The reaction is controlled by atom diffusion occurring at the fibre/matrix interface. However, in the reaction process, Al, Cr and Mo in the matrix are rejected and piled up in front of the RZ on the matrix side. A structure model is proposed to describe the formation mechanism of the interface RZ.

U2 - 10.1016/j.micron.2018.07.003

DO - 10.1016/j.micron.2018.07.003

M3 - Article

SN - 0968-4328

VL - 113

SP - 91

EP - 98

JO - Micron

JF - Micron

ER -

A study of interface reaction zone in a SiC fibre /Ti-17 composite

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