Effect of Si, Al2O3 additives on the ablation behavior of ZrB2-SiC coating with Al2O3-modified SiC bond coat for C/C composites
Journal of the European Ceramic Society(2024)
摘要
This work firstly evaluated the effect of temperature on the preparation of SiC coating using Al2O3 as catalyst by pack cementation (PC) method. SiC/ZrB2-SiC-Si (ZSS) and SiC/ZrB2-SiC-Al2O3 (ZSA) coating were prepared on the surface of C/C composites by PC combined with atmospheric plasma spraying (APS). The objective of this work is to study the influence of Si and Al2O3 additives for ablation performances of ZrB2-SiC coating. The coated samples were subjected to ablation test, and the phase composition and microstructure evolution were investi-gated. The results indicated that SiC/ZSA coating had better ablation resistance because phase transformation and growth of ZrO2 grain was restrained by Al2O3.
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关键词
C/C composites,Pack cementation,Atmospheric plasma spraying,ZrB 2-SiC coating,Ablation resistance
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