Fabrication of Silicon Carbide (SiC) Coatings from Pyrolysis of Polycarbosilane/Aluminum

Daxiang Yang, Yuxi Yu, Xiaofeng Zhao, Yongcai Song, Eddie Lopez-Honorato, Ping Xiao, Delin Lai

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The SiC coatings were fabricated by the pyrolysis of polycarbosilane (PCS)/aluminum, in which PCS acts as precermaic precursor of SiC and aluminum (Al) powder acts as an active filler to both compensate the volume shrinkage of SiC coatings during pyrolysis and enhance the adhesion of SiC coatings with Fecralloy substrate. SiC coatings as thick as ~35 μm without cracking can be fabricated through our approach. Microstructural analysis revealed that the SiC coatings were composed of α-Al 2O 3 and β-SiC. Hardness and modulus of the SiC coatings as measured by nano-indentation were 12. 2 ± 4. 0 and 153. 7 ± 47. 0 GPa, respectively.

Original languageEnglish
Pages (from-to)534-540
Number of pages7
JournalJournal of Inorganic and Organometallic Polymers and Materials
Volume21
Issue number3
DOIs
StatePublished - Sep 2011
Externally publishedYes

Funding

Acknowledgments The authors thank the support of China Scholarship Council. We also thank Dr. Ian Shapiro and Dr. Libo Deng for the very helpful discussions.

FundersFunder number
China Scholarship Council

    Keywords

    • Aluminum
    • Coating
    • Polycarbosilane
    • Silicon carbide

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