Journal
MATERIALS LETTERS
Volume 328, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.133088
Keywords
Ceramics; Microstructure; Oxidation; Coating
Funding
- National Natural Science Foundation of China [51904242, 52172074]
- Key research and development program of Shaanxi Province [2022GY-368]
- China Postdoctoral Science Foundation [2018M633545]
- Natural Science Foundation of Shaanxi Provincial Department of Education [21JK0784]
- Xi'an Municipal Science and Technology Project [21XJZZ0052]
- Science Project of Beilin District [GX2101]
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PCS-derived coatings with crack-free morphology and superior oxidation resistance were prepared on Q235 steels by dip-coating method. The effects of glass filler content on the composition, morphology, interface, and oxidation resistance of the coatings were investigated. It was found that the addition of glass filler can fill the cracks resulted from polycarbosilane shrinkage during pyrolysis, leading to crack-free coatings and improved oxidation resistance.
Polycarbosilane-derived (PCS-derived) coatings with crack-free morphology and superior oxidation resistance were prepared on the Q235 steels by a dip-coating method. The effects of glass filler content on the phase composition, surface morphology, interface and oxidation resistance of the coatings were investigated. The fabricated coatings mainly consist of crystalline phases of SiC and Al2O3. The content of Al2O3 phase increases with the increase in glass filler content. Addition of glass filler has the ability to fill the cracks resulting from the shrinkage of polycarbosilane during pyrolysis, and crack-free coatings can be obtained. Moderate addition of glass filler in the PCS-derived coatings can significantly improve the oxidation resistance of Q235 steel.
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