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Laser ablation behaviors of vacuum plasma sprayed ZrC‐based coatings
Author(s) -
Liu Tao,
Niu Yaran,
Pan Xiaohui,
Shi Minhao,
Zheng Xuebin,
Yu Jianding,
Ding Chuanxian
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16278
Subject(s) - materials science , coating , ablation , laser ablation , evaporation , microstructure , ceramic , layer (electronics) , plasma , composite material , decomposition , laser , optics , thermodynamics , ecology , physics , quantum mechanics , biology , engineering , aerospace engineering
ZrC, ZrC‐30 vol% SiC, and ZrC‐30 vol% TiC coatings were fabricated by vacuum plasma spray and the laser ablation behaviors were evaluated by a CO 2 laser beam under two heat fluxes (15.9 and 25.5 MW/m 2 ). The phase compositions and microstructures of the coatings after ablation were investigated and the effect of SiC and TiC additives was analyzed. The results showed that the ZrC–SiC coating displayed better ablation resistance compared with the ZrC and ZrC–TiC coatings under 15.9 MW/m 2 heat flux. While the ZrC–TiC coating exhibited the improved ablation resistance under 25.5 MW/m 2 heat flux. The continuous and integral ZrO 2 –SiO 2 scale provided protective effect for the ZrC–SiC coating. A liquid ZrO 2 –TiO 2 layer which owned self‐healing ability was formed for the ZrC–TiC coating in both heat fluxes. However, the state of the formed liquid, like amount, viscosity, evaporation, and decomposition, was influenced by the environment and was vital for the ablation resistance. This work might give a clue for designing ultrahigh‐temperature ceramics as potential laser ablation–resistant coating materials.