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Ablation Resistance of APS Sprayed Mullite/ZrB2-MoSi2 Coating for Carbon/Carbon Composites
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School of Materials Science and Engineering,South China University of Technology,Guangdong Institute of New Materials,National Engineering Laboratory for Modern Materials surface Engineering Technology,Guangdong Provincial Key Lab for Modern Materials Surface Engineering Technology,Guangdong Institute of New Materials,National Engineering Laboratory for Modern Materials surface Engineering Technology,Guangdong Provincial Key Lab for Modern Materials Surface Engineering Technology,Guangdong Institute of New Materials,National Engineering Laboratory for Modern Materials surface Engineering Technology,Guangdong Provincial Key Lab for Modern Materials Surface Engineering Technology,School of Materials Science and Engineering,South China University of Technology,Guangdong Institute of New Materials,National Engineering Laboratory for Modern Materials surface Engineering Technology,Guangdong Provincial Key Lab for Modern Materials Surface Engineering Technology

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TB332

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    Abstract:

    Mullite/ZrB2-MoSi2 coating was deposited on carbon/carbon(C/C) composites to protect against ablation by atmospheric plasma spraying (APS). The microstructure and morphology of the coating were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The ablation resistance of the coating was investigated at different temperatures with oxypropylene torch. The mass ablation rates of the Mullite/ZrB2-MoSi2 coated C/C composites were 3.49×10-3 g/s and 3.77×10-3 g/s after ablation at 1700 °C and 1800 °C for 60 s respectively, which exhibited good ablation resistance compared with the single-layer ZrB2-MoSi2 coated. The increase of ablation resistance can be attributed to the formation of a silicates glass film, which acted as thermal barrier and self-sealed the defects of the coatings.

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[Han Wei, Liu Min, Deng Chunming, Liu Xuezhang, Zeng Dechang, Zhou Kesong. Ablation Resistance of APS Sprayed Mullite/ZrB2-MoSi2 Coating for Carbon/Carbon Composites[J]. Rare Metal Materials and Engineering,2018,47(4):1043~1048.]
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History
  • Received:July 21,2016
  • Revised:April 19,2018
  • Adopted:September 14,2016
  • Online: May 31,2018

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