TY - JOUR
T1 - Ablation resistance of ZrC coating modified by polymer-derived SiHfOC ceramic microspheres at ultrahigh temperature
AU - Zhang, Xuemeng
AU - Zhang, Yuyu
AU - Guo, Lingxiang
AU - Liu, Bing
AU - Wang, Yuqi
AU - Li, Hongbin
AU - Li, Hejun
AU - Sun, Jia
N1 - Publisher Copyright:
© 2023
PY - 2024/5/20
Y1 - 2024/5/20
N2 - Polymer-derived ceramics (PDCs) method opens up new possibilities for the preparation of novel multiphase ceramic nanocomposites owing to the molecular design of the precursors at the nanoscale level. In the current work, ZrC coatings incorporated with polymer-derived ceramic microspheres (CMS), SiHfOC_CMS, were deposited to enhance the ablation resistance by supersonic atmosphere plasma spraying. Upon 10.0 MW·m–2 plasma ablation at above 3000 °C, the linear ablation rate of ZrC-SiHfOC_CMS coating was reduced to 0.20 µm·s–1, 62% lower than that of the pristine ZrC coating. The improvement was ascribed to the presentence of viscous SiO2/HfO2 molten mixed phase, rather than HfSiO4, which can effectively seal pinholes and cracks. Moreover, the in-situ generated crystalline SiO2 had a lower oxygen diffusion rate than amorphous SiO2, meanwhile, m-HfO2 could improve the stability of SiO2 glassy film, thus further enhancing the ablation resistance.
AB - Polymer-derived ceramics (PDCs) method opens up new possibilities for the preparation of novel multiphase ceramic nanocomposites owing to the molecular design of the precursors at the nanoscale level. In the current work, ZrC coatings incorporated with polymer-derived ceramic microspheres (CMS), SiHfOC_CMS, were deposited to enhance the ablation resistance by supersonic atmosphere plasma spraying. Upon 10.0 MW·m–2 plasma ablation at above 3000 °C, the linear ablation rate of ZrC-SiHfOC_CMS coating was reduced to 0.20 µm·s–1, 62% lower than that of the pristine ZrC coating. The improvement was ascribed to the presentence of viscous SiO2/HfO2 molten mixed phase, rather than HfSiO4, which can effectively seal pinholes and cracks. Moreover, the in-situ generated crystalline SiO2 had a lower oxygen diffusion rate than amorphous SiO2, meanwhile, m-HfO2 could improve the stability of SiO2 glassy film, thus further enhancing the ablation resistance.
KW - Carbon/Carbon composites
KW - Plasma ablation
KW - Plasma spraying
KW - Polymer-derived ceramics (PDCs)
KW - ZrC
UR - http://www.scopus.com/inward/record.url?scp=85178352626&partnerID=8YFLogxK
U2 - 10.1016/j.jmst.2023.09.031
DO - 10.1016/j.jmst.2023.09.031
M3 - 文章
AN - SCOPUS:85178352626
SN - 1005-0302
VL - 182
SP - 119
EP - 131
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
ER -