Ceramics-Silikáty 44, (2) 54 - 59 (2000) |
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INFLUENCE OF MATRIX DENSIFICATION UPON STRUCTURE AND
ELASTIC PROPERTIES OF CARBON-CARBON COMPOSITE SHELLS
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Glogar Petr 1, Černý Martin 1, Krula Martin 2
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1 Inst. of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic,
V Holešovičkách 41, 182 09 Praha 8, Czech Republic
2 Textile Faculty, Technical University of Liberec,
Hálkova 6, 461 17 Liberec, Czech Republic
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Carbonisation of "green" composite shells reinforced with carbon yarn braid and soaked with phenolic resin yielded carboncarbon
composite cylindrical shells. The obtained porous composite material was densified by impregnation with various
precursors of secondary carbon matrix. By measuring the longitudinal and tangential elastic moduli of the composite shells
by a resonant frequency technique their gradual stiffening was monitored. The roles of the braiding angle and of the
processing parameters (heat treatment, densification, and impregnant type) upon constitution of the composite shell elasticity
are discussed. |
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