Ablation resistance of wedge-shaped C/C-ZrB2-ZrC-SiC composites exposed to an oxyacetylene torch

被引：45

作者：

Zhuang, Lei ^{[1
]}

Fu, Qian-Gang ^{[1
]}

Liu, Tian-Yu ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China

来源：

CORROSION SCIENCE | 2016年 / 112卷

基金：

中国国家自然科学基金;

关键词：

Ceramic matrix composites; SEM; XRD; High temperature corrosion; CARBON-CARBON COMPOSITES; ZRC-SIC COMPOSITES; CARBON/CARBON COMPOSITES; OXIDATION RESISTANCE; C/C; BEHAVIOR; MECHANISM; MICROSTRUCTURE; PROPERTY; CARBIDE;

D O I：

10.1016/j.corsci.2016.08.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ablation resistance of wedge-shaped C/C-ZrB2-ZrC-SiC composites was studied under an oxyacetylene torch. Ablation morphologies and phase compositions were examined by SEM and XRD. As exposed to low heat flux of 2.38 MW/m(2), a porous and homogeneous ZrC-ZrO2 skeleton generated. With the increasing of heat flux, ceramic oxides at the tip became loose and fragmented instead of sintering together. Besides that, owing to the wedge-shape of the specimen, high gas pressure mainly concentrated at this region. The high gas pressure and strong shear scouring of flame resulted in the limited accumulation of ceramic oxides. This led to an inferior ablation of wedge-shaped C/C-ZrB2-ZrC-SiC composites in high heat flux of 4.18 MW/m(2). (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：462 / 470

页数：9

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