Protective coatings for carbon bonded carbon fibre composites

Smeacetto F, Ferraris M, Saivo M, Ellacott SD, Ahmed A, Rawlings RD, Boccaccini AR (2008)

Publication Type: Journal article

Publication year: 2008

Journal

Ceramics International Elsevier

Publisher: Elsevier

Pages Range: 1297-1301

Journal Issue: 34

DOI: 10.1016/j.ceramint.2007.03.012

Abstract

Carbon bonded carbon fibre composites (CBCF) were modified by direct reaction with molten silicon in order to obtain a silicon carbide layer on the composite surface. Subsequently, the Si-infiltrated CBCF material was coated with a silica-based glass containing yttria and alumina by means of a slurry-dipping technique. On heat treatment the glass yielded a glass-ceramic layer thus giving a multi-layered oxidation and erosion protection system. The microstructural characterisation of the coating was conducted by standard microscopy techniques and by X-ray diffraction. The controlled crystallization of the glass-produced cristobalite, yttrium silicate (Y2Si2O7, keiviite, β-form) and mullite as main crystalline phases. These are excellent ceramic materials for oxidation and erosion protection of SiC-coated carbon-based composites since their coefficients of thermal expansion (CTE) closely match that of SiC. The possibility of healing (closure) of micro cracks by a thermal treatment at 1375 °C, thus exploiting the viscous flow of the residual glass in the glass-ceramic, was explored in order to extend the service life of the protection system. © 2007 Elsevier Ltd and Techna Group S.r.l.

Authors with CRIS profile

Aldo Boccaccini Lehrstuhl für Werkstoffwissenschaften (Biomaterialien)

Involved external institutions

Politecnico di Torino IT Italy (IT) Calcarb Ltd. GB United Kingdom (GB) Imperial College London / The Imperial College of Science, Technology and Medicine GB United Kingdom (GB)

How to cite

APA:

Smeacetto, F., Ferraris, M., Saivo, M., Ellacott, S.D., Ahmed, A., Rawlings, R.D., & Boccaccini, A.R. (2008). Protective coatings for carbon bonded carbon fibre composites. Ceramics International, 34, 1297-1301. https://doi.org/10.1016/j.ceramint.2007.03.012

MLA:

Smeacetto, F., et al. "Protective coatings for carbon bonded carbon fibre composites." Ceramics International 34 (2008): 1297-1301.

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