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

Lei Zhuang; Qian Gang Fu; Tian Yu Liu

doi:10.1016/j.corsci.2016.08.010

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

Lei Zhuang, Qian Gang Fu, Tian Yu Liu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

52 Scopus citations

Abstract

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/m², 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/m².

Original language	English
Pages (from-to)	462-470
Number of pages	9
Journal	Corrosion Science
Volume	112
DOIs	https://doi.org/10.1016/j.corsci.2016.08.010
State	Published - 1 Nov 2016

Keywords

A. Ceramic matrix composites
B. SEM
B. XRD
C. High temperature corrosion

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10.1016/j.corsci.2016.08.010

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

abstract = "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/m2, 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/m2.",

keywords = "A. Ceramic matrix composites, B. SEM, B. XRD, C. High temperature corrosion",

author = "Lei Zhuang and Fu, {Qian Gang} and Liu, {Tian Yu}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

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doi = "10.1016/j.corsci.2016.08.010",

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T1 - Ablation resistance of wedge-shaped C/C-ZrB2-ZrC-SiC composites exposed to an oxyacetylene torch

AU - Zhuang, Lei

AU - Fu, Qian Gang

AU - Liu, Tian Yu

PY - 2016/11/1

Y1 - 2016/11/1

N2 - 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/m2, 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/m2.

AB - 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/m2, 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/m2.

KW - A. Ceramic matrix composites

KW - B. SEM

KW - B. XRD

KW - C. High temperature corrosion

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DO - 10.1016/j.corsci.2016.08.010

M3 - 文章

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SN - 0010-938X

VL - 112

SP - 462

EP - 470

JO - Corrosion Science

JF - Corrosion Science

ER -

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

Abstract

Keywords

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