z-logo
Premium
A Multilayer SiC/ZrB2/SiC Ablation Resistance Coating for Carbon/Carbon Composites
Author(s) -
Sun Guodong,
Li Hejun,
Yao Dongjia,
Li Hui,
Yu Pengfei,
Xie Jing,
Pan Xianqing,
Fan Jize,
Wang Wei
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201800774
Subject(s) - materials science , composite material , ablation , coating , chemical vapor deposition , layer (electronics) , reinforced carbon–carbon , carbon fibers , ablative case , composite number , nanotechnology , medicine , aerospace engineering , engineering , radiation therapy
To improve the ablation resistance of carbon/carbon (C/C) composites, a new SiC/ZrB 2 /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/ZrB 2 /SiC coating is investigated under oxyacetylene torch environment. Oxyacetylene ablation testing results show that the linear ablation rate and mass ablation rate of SiC/ZrB 2 /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 ZrB 2 /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 SiO 2 –ZrO 2 hybrid glassy layer formed after ablation on the surface of the composites and acting as thermal barrier layer inhibiting inward diffusion of oxygen.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here