Oxidation behavior of 3D Hi-Nicalon/SiC composite

Shoujun Wu; Laifei Cheng; Litong Zhang; Yongdong Xu; Qing Zhang

doi:10.1016/j.matlet.2006.02.072

Oxidation behavior of 3D Hi-Nicalon/SiC composite

Shoujun Wu, Laifei Cheng, Litong Zhang, Yongdong Xu, Qing Zhang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

13 Scopus citations

Abstract

Oxidation behavior of a three dimensional (3D) Hi-Nicalon/SiC composite with CVD SiC coating was investigated in the simulated air using a thermogravimetric analysis (TGA) device. Below 1100 °C, the oxidation kinetics was controlled by gas diffusion through the defects in the SiC matrix and coating and resulted in the consumption of PyC interphase. The residual flexural strength did have not a remarkable fluctuation and the relationship between the residual strength to temperature and weight change to temperature of the 3D Hi-Nicalon/PyC/SiC composite indicated the same regularity. Above 1200 °C, the oxidation kinetics was controlled by oxygen diffusion through the SiO₂ scale formed on the SiC coating and matrix. And the residual flexural strength of the composites was governed by the strength degradation of the Hi-Nicalon fiber. After oxidation, the fracture displacement in flexural tests increased with the weight loss increasing and the fracture mode showed a non-brittle pattern.

Original language	English
Pages (from-to)	3197-3201
Number of pages	5
Journal	Materials Letters
Volume	60
Issue number	25-26
DOIs	https://doi.org/10.1016/j.matlet.2006.02.072
State	Published - Nov 2006

Keywords

Coating
Hi-Nicalon/PyC/SiC
Oxidation
Residual flexural strength

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10.1016/j.matlet.2006.02.072

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title = "Oxidation behavior of 3D Hi-Nicalon/SiC composite",

abstract = "Oxidation behavior of a three dimensional (3D) Hi-Nicalon/SiC composite with CVD SiC coating was investigated in the simulated air using a thermogravimetric analysis (TGA) device. Below 1100 °C, the oxidation kinetics was controlled by gas diffusion through the defects in the SiC matrix and coating and resulted in the consumption of PyC interphase. The residual flexural strength did have not a remarkable fluctuation and the relationship between the residual strength to temperature and weight change to temperature of the 3D Hi-Nicalon/PyC/SiC composite indicated the same regularity. Above 1200 °C, the oxidation kinetics was controlled by oxygen diffusion through the SiO2 scale formed on the SiC coating and matrix. And the residual flexural strength of the composites was governed by the strength degradation of the Hi-Nicalon fiber. After oxidation, the fracture displacement in flexural tests increased with the weight loss increasing and the fracture mode showed a non-brittle pattern.",

keywords = "Coating, Hi-Nicalon/PyC/SiC, Oxidation, Residual flexural strength",

author = "Shoujun Wu and Laifei Cheng and Litong Zhang and Yongdong Xu and Qing Zhang",

year = "2006",

month = nov,

doi = "10.1016/j.matlet.2006.02.072",

language = "英语",

volume = "60",

pages = "3197--3201",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

number = "25-26",

}

TY - JOUR

T1 - Oxidation behavior of 3D Hi-Nicalon/SiC composite

AU - Wu, Shoujun

AU - Cheng, Laifei

AU - Zhang, Litong

AU - Xu, Yongdong

AU - Zhang, Qing

PY - 2006/11

Y1 - 2006/11

N2 - Oxidation behavior of a three dimensional (3D) Hi-Nicalon/SiC composite with CVD SiC coating was investigated in the simulated air using a thermogravimetric analysis (TGA) device. Below 1100 °C, the oxidation kinetics was controlled by gas diffusion through the defects in the SiC matrix and coating and resulted in the consumption of PyC interphase. The residual flexural strength did have not a remarkable fluctuation and the relationship between the residual strength to temperature and weight change to temperature of the 3D Hi-Nicalon/PyC/SiC composite indicated the same regularity. Above 1200 °C, the oxidation kinetics was controlled by oxygen diffusion through the SiO2 scale formed on the SiC coating and matrix. And the residual flexural strength of the composites was governed by the strength degradation of the Hi-Nicalon fiber. After oxidation, the fracture displacement in flexural tests increased with the weight loss increasing and the fracture mode showed a non-brittle pattern.

AB - Oxidation behavior of a three dimensional (3D) Hi-Nicalon/SiC composite with CVD SiC coating was investigated in the simulated air using a thermogravimetric analysis (TGA) device. Below 1100 °C, the oxidation kinetics was controlled by gas diffusion through the defects in the SiC matrix and coating and resulted in the consumption of PyC interphase. The residual flexural strength did have not a remarkable fluctuation and the relationship between the residual strength to temperature and weight change to temperature of the 3D Hi-Nicalon/PyC/SiC composite indicated the same regularity. Above 1200 °C, the oxidation kinetics was controlled by oxygen diffusion through the SiO2 scale formed on the SiC coating and matrix. And the residual flexural strength of the composites was governed by the strength degradation of the Hi-Nicalon fiber. After oxidation, the fracture displacement in flexural tests increased with the weight loss increasing and the fracture mode showed a non-brittle pattern.

KW - Coating

KW - Hi-Nicalon/PyC/SiC

KW - Oxidation

KW - Residual flexural strength

UR - http://www.scopus.com/inward/record.url?scp=33750042942&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2006.02.072

DO - 10.1016/j.matlet.2006.02.072

M3 - 文章

AN - SCOPUS:33750042942

SN - 0167-577X

VL - 60

SP - 3197

EP - 3201

JO - Materials Letters

JF - Materials Letters

IS - 25-26

ER -

Oxidation behavior of 3D Hi-Nicalon/SiC composite

Abstract

Keywords

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