TY - JOUR
T1 - A Multilayer SiC/ZrB2/SiC Ablation Resistance Coating for Carbon/Carbon Composites
AU - Sun, Guodong
AU - Li, Hejun
AU - Yao, Dongjia
AU - Li, Hui
AU - Yu, Pengfei
AU - Xie, Jing
AU - Pan, Xianqing
AU - Fan, Jize
AU - Wang, Wei
N1 - Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/5
Y1 - 2019/5
N2 - To improve the ablation resistance of carbon/carbon (C/C) composites, a new SiC/ZrB2/SiC multilayer coating is designed and fabricated by a three-step method of pack cementation, supersonic plasma spraying, and low pressure chemical vapor deposition. In this study, ablation behavior of SiC/ZrB2/SiC coating is investigated under oxyacetylene torch environment. Oxyacetylene ablation testing results show that the linear ablation rate and mass ablation rate of SiC/ZrB2/SiC coated C/C composites are only −5.0 × 10−4 mm s−1 and −9.6 × 10−4 g s−1, respectively, for 20 s ablation under heat flux of 2400 kW m−2. However, the ablative linear rate of ZrB2/SiC coated C/C composites is 7.5 × 10−4 mm s−1 and the ablative mass rate is zero. The better ablation resistance is mainly attributed to a molten SiO2–ZrO2 hybrid glassy layer formed after ablation on the surface of the composites and acting as thermal barrier layer inhibiting inward diffusion of oxygen.
AB - To improve the ablation resistance of carbon/carbon (C/C) composites, a new SiC/ZrB2/SiC multilayer coating is designed and fabricated by a three-step method of pack cementation, supersonic plasma spraying, and low pressure chemical vapor deposition. In this study, ablation behavior of SiC/ZrB2/SiC coating is investigated under oxyacetylene torch environment. Oxyacetylene ablation testing results show that the linear ablation rate and mass ablation rate of SiC/ZrB2/SiC coated C/C composites are only −5.0 × 10−4 mm s−1 and −9.6 × 10−4 g s−1, respectively, for 20 s ablation under heat flux of 2400 kW m−2. However, the ablative linear rate of ZrB2/SiC coated C/C composites is 7.5 × 10−4 mm s−1 and the ablative mass rate is zero. The better ablation resistance is mainly attributed to a molten SiO2–ZrO2 hybrid glassy layer formed after ablation on the surface of the composites and acting as thermal barrier layer inhibiting inward diffusion of oxygen.
KW - ablation
KW - carbon/carbon composites
KW - chemical vapor deposition
KW - coating
KW - supersonic plasma spraying
UR - http://www.scopus.com/inward/record.url?scp=85058187464&partnerID=8YFLogxK
U2 - 10.1002/adem.201800774
DO - 10.1002/adem.201800774
M3 - 文章
AN - SCOPUS:85058187464
SN - 1438-1656
VL - 21
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
IS - 5
M1 - 1800774
ER -