| Autor: |
Serre, Aurélie, Blein, Joëlle, Pierre, Yannick, David, Patrick, Audubert, Fabienne, Bonnamy, Sylvie, Bruneton, Eric |
| Předmět: |
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| Zdroj: |
Ceramic Engineering & Science Proceedings; Oct2012, Vol. 33 Issue 9, p71-84, 14p |
| Abstrakt: |
Film-boiling technique is a Ceramic Matrix Composites fabrication process, especially studied for the densification of carbon based composites. The densification starts from the porous preform, heated at high temperature in a liquid precursor which becomes gaseous in contact with hot surfaces. The cracking of the vapours results in a solid deposit constituting the matrix of the final composite. The main advantage of the film-boiling technique is its high densification rate: up to several hundreds of μm/h depending on the experimental set up (versus ~ 2μm/h in CVI). To get a better insight on this process, laboratory scale equipment with an internal resistive heating was developed. In this work, carbon preforms are densified by silicon carbide (SiC) matrices. Two SiC precursors are used: the methyltrichlorosilane (MTS) and the CVD4000. The samples characterizations show that the quality of the matrix (density, homogeneity, crystalline phase...) and the densification rate depend on several experimental settings (type of precursor, densification temperature...). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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