Mechanical properties and ablation resistance of La2O3-modified HfC-SiC coating for SiC-coated C/C composites

Guanghui Feng; Hejun Li; Xiyuan Yao; Tianyu Liu; Yujun Jia; Li Yang; Bo Li

doi:10.1016/j.corsci.2021.109259

Mechanical properties and ablation resistance of La₂O₃-modified HfC-SiC coating for SiC-coated C/C composites

Guanghui Feng, Hejun Li, Xiyuan Yao, Tianyu Liu, Yujun Jia, Li Yang, Bo Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

37 Scopus citations

Abstract

Plasma-sprayed La₂O₃-modified HfC-SiC (HSL) coating was prepared on SiC-coated carbon/carbon composites to obtain an elevated ablation resistance under a heat flux of 2.38 MW/m². The elastic modulus of sprayed HSL coating is about 140.97 GPa, 41.48 % greater than HfC-SiC (HS) coating. HSL coating also performed superior ablation resistance evidenced by integrated scale and stable ablation rates. Besides, the elastic modulus and adhesion strength of ablated HSL coating gained 65.9 % and 26.9 % increase compared with HS coating. Its reliable service performance is primarily attributed to the formed scale constituted by HfO₂ and La₂Hf₂O₇ particles encapsulated by La-Si-O glass.

Original language	English
Article number	109259
Journal	Corrosion Science
Volume	182
DOIs	https://doi.org/10.1016/j.corsci.2021.109259
State	Published - 15 Apr 2021

Keywords

Ablation resistance
Carbon/carbon composites
HfC-SiC coating
Mechanical properties
Rare earth oxide

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10.1016/j.corsci.2021.109259

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title = "Mechanical properties and ablation resistance of La2O3-modified HfC-SiC coating for SiC-coated C/C composites",

abstract = "Plasma-sprayed La2O3-modified HfC-SiC (HSL) coating was prepared on SiC-coated carbon/carbon composites to obtain an elevated ablation resistance under a heat flux of 2.38 MW/m2. The elastic modulus of sprayed HSL coating is about 140.97 GPa, 41.48 % greater than HfC-SiC (HS) coating. HSL coating also performed superior ablation resistance evidenced by integrated scale and stable ablation rates. Besides, the elastic modulus and adhesion strength of ablated HSL coating gained 65.9 % and 26.9 % increase compared with HS coating. Its reliable service performance is primarily attributed to the formed scale constituted by HfO2 and La2Hf2O7 particles encapsulated by La-Si-O glass.",

keywords = "Ablation resistance, Carbon/carbon composites, HfC-SiC coating, Mechanical properties, Rare earth oxide",

author = "Guanghui Feng and Hejun Li and Xiyuan Yao and Tianyu Liu and Yujun Jia and Li Yang and Bo Li",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

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day = "15",

doi = "10.1016/j.corsci.2021.109259",

language = "英语",

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journal = "Corrosion Science",

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TY - JOUR

T1 - Mechanical properties and ablation resistance of La2O3-modified HfC-SiC coating for SiC-coated C/C composites

AU - Feng, Guanghui

AU - Li, Hejun

AU - Yao, Xiyuan

AU - Liu, Tianyu

AU - Jia, Yujun

AU - Yang, Li

AU - Li, Bo

PY - 2021/4/15

Y1 - 2021/4/15

N2 - Plasma-sprayed La2O3-modified HfC-SiC (HSL) coating was prepared on SiC-coated carbon/carbon composites to obtain an elevated ablation resistance under a heat flux of 2.38 MW/m2. The elastic modulus of sprayed HSL coating is about 140.97 GPa, 41.48 % greater than HfC-SiC (HS) coating. HSL coating also performed superior ablation resistance evidenced by integrated scale and stable ablation rates. Besides, the elastic modulus and adhesion strength of ablated HSL coating gained 65.9 % and 26.9 % increase compared with HS coating. Its reliable service performance is primarily attributed to the formed scale constituted by HfO2 and La2Hf2O7 particles encapsulated by La-Si-O glass.

AB - Plasma-sprayed La2O3-modified HfC-SiC (HSL) coating was prepared on SiC-coated carbon/carbon composites to obtain an elevated ablation resistance under a heat flux of 2.38 MW/m2. The elastic modulus of sprayed HSL coating is about 140.97 GPa, 41.48 % greater than HfC-SiC (HS) coating. HSL coating also performed superior ablation resistance evidenced by integrated scale and stable ablation rates. Besides, the elastic modulus and adhesion strength of ablated HSL coating gained 65.9 % and 26.9 % increase compared with HS coating. Its reliable service performance is primarily attributed to the formed scale constituted by HfO2 and La2Hf2O7 particles encapsulated by La-Si-O glass.

KW - Ablation resistance

KW - Carbon/carbon composites

KW - HfC-SiC coating

KW - Mechanical properties

KW - Rare earth oxide

UR - http://www.scopus.com/inward/record.url?scp=85100001150&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2021.109259

DO - 10.1016/j.corsci.2021.109259

M3 - 文章

AN - SCOPUS:85100001150

SN - 0010-938X

VL - 182

JO - Corrosion Science

JF - Corrosion Science

M1 - 109259

ER -

Mechanical properties and ablation resistance of La₂O₃-modified HfC-SiC coating for SiC-coated C/C composites

Abstract

Keywords

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