Additively-manufactured multiphase coatings with laser protection ability for the repairing of MoSi2-SiC/SiC coated C/C composites

Han Hui Wang, Jing An Kong, Xu Tong Ti, Xue Min Yin, Xiao Hong Shi, He Jun Li

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The Si-SiC-MoSi2 and Si-SiC coatings were proposed to repair the damaged MoSi2-SiC/SiC coated C/C composites by laser directed energy deposition. Laser ablation was used to assess the repair effect. Results showed that both the repaired coatings with dense structure could restore the geometric size of damaged area. Compared with the Si-SiC-MoSi2 coating, the Si-SiC repaired coating with higher laser reflectivity and more free Si could reduce the heat generation and enhance the heat dissipation during ablation, which lowered the maximum temperature by 347.49 K and 810.77 K under 300 W and 500 W ablation for 7 s separately, beneficial to avoid the secondary laser damage of the repaired area.

Original languageEnglish
Pages (from-to)25788-25797
Number of pages10
JournalCeramics International
Volume48
Issue number18
DOIs
StatePublished - 15 Sep 2022

Keywords

  • C/C composites
  • Coating repair
  • Laser ablation
  • Laser directed energy deposition

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