Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Ablation Behavior of ZrB2-SiC UHTC Composite under Various Flame Angle Using Oxy-Acetylene Torch

산소-아세틸렌 토치의 조사각이 ZrB2-SiC UHTC 복합체 삭마 특성에 미치는 영향

  • Seung Yong, Lee (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jung Hoon, Kong (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jung Hwan, Song (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Young Il, Son (Agency for Defense Development) ;
  • Do Kyung, Kim (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
  • 이승용 (한국과학기술원 신소재공학과) ;
  • 공정훈 (한국과학기술원 신소재공학과) ;
  • 송정환 (한국과학기술원 신소재공학과) ;
  • 손영일 (국방과학연구소) ;
  • 김도경 (한국과학기술원 신소재공학과)
  • Received : 2022.10.04
  • Accepted : 2022.12.04
  • Published : 2022.12.27
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Abstract

In this work, the ablation behavior of monolith ZrB2-30 vol%SiC (Z30S) composites were studied under various oxy-acetylene flame angles. Typical oxidized microstructures (SiO2/SiC-depleted/ZrB2-SiC) were observed when the flame to Z30S was arranged vertically. However, formation of the outmost glassy SiO2 layer was hindered when the Z30S was tilted. The SiC-depleted region was fully exposed to air with reduced thickness when highly tilted. Traces of the ablated and island type SiO2 were observed at intermediate flame angles, which clearly verified the effect of flame angle on the ablation of the SiO2 layer. Furthermore, the observed maximum surface temperature of the Z30S gradually increased up to 2,200 ℃ proving that surface amorphous silica was continuously removed while monoclinic ZrO2 phase began to be exposed. A proposed ablation mechanism with respect to flame angles is discussed. This observation is expected to contribute to the design of complex-shaped UHTC applications for hypersonic vehicles and re-entry projectiles.

Keywords

Acknowledgement

We would like to acknowledge financial support from the Defense Acquisition Program Administration and Agency for Defense Development under contracts UD210022SD. This work was also supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2021M1A3B807891712).

References

  1. W. G. Fahrenholtz and G. Hilmas, Scr. Mater., 129, 94 (2017).
  2. J. Watts, G. Hilmas, W. G. Fahrenholtz, D. Brown and B. Clausen, J. Eur. Ceram. Soc., 31, 1811 (2011).
  3. A. Rezaie, W. G. Fahrenholtz and G. Hilmas, J. Am. Ceram. Soc., 89, 3240 (2006).
  4. C. Tallon, D. Chavara, A. Gillen, D. Riley, L. Edwards, S. Moricca and G. V. Franks, J. Am. Ceram. Soc., 96, 2374 (2013).
  5. R. Inoue, Y. Aral, Y. Kubota, Y. Kogo and K. Goto, J. Mater. Sci., 53, 14885 (2018).
  6. B. Lonnberg, J. Less-Common Met., 141, 145 (1988). https://doi.org/10.1016/0022-5088(88)90219-6
  7. T. S. Moon, S. H. Park, J. S. Choi and H. I. Huh, J. Korean Soc. Aeronaut. Space Sci., 45, 844 (2017).
  8. S. H. Park, T. S. Moon and H. I. Huh, J. Korean Soc. Precis. Eng., 22, 19 (2018).
  9. F. Cardarelli, Materials Handbook, 2nd ed., p. 939, Springer, UK (2000).
  10. Y. H. Seong, C. Y. Baek, J. H. Kim, J. H. Kong, D. S. Kim, S. H. Lee and D. K. Kim, Ceram. Int., 44, 8505 (2018).
  11. Y. H. Seong, S. J. Lee and D. K. Kim, J. Am. Ceram. Soc., 96, 1570 (2013).
  12. R. Inoue, Y. Arai and Y. Kubota, Ceram. Int., 43, 8081 (2017).
  13. J. Han, P. Hu, X. Zhang, S. Meng and W. Han, Compos. Sci. Technol., 68, 799 (2008).
  14. W. G. Fahrenholtz, J. Am. Ceram. Soc., 90, 143 (2006).
  15. I. Akin, M. Hotta, F. C. Sahin, O. Yucel, G. Goller and T. Goto, J. Eur. Ceram. Soc., 29, 2379 (2009).