C/C复合材料大气等离子喷涂mullite/ZrB2-MoSi2涂层抗烧蚀性能

作者：Han Wei; Liu Min^*; Deng Chunming; Liu Xuezhang; Zeng Dechang; Zhou Kesong

来源：Rare Metal Materials and Engineering, 2018, 47(4): 1043-1048.

• Ablation
• Atmospheric plasma spraying
• C/C composites
• Coating

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 results show that the mass ablation rates of the Mullite/ZrB2-MoSi2 coated C/C composites are 3.49×10-3 g/s and 3.77×10-3 g/s after ablation at 1700 and 1800 °C for 60 s, respectively, which exhibit 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 acts as a thermal barrier and self-seals the defects of the coatings. ? 2018, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV.

• 单位
  华南理工大学