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Journal of Aerospace Technology and Management

Print version ISSN 1984-9648On-line version ISSN 2175-9146

J. Aerosp. Technol. Manag. vol.1 no.2 São José dos Campos July/Dec. 2009

http://dx.doi.org/10.5028/jatm.2009.0102231241 

ORIGINAL PAPERS

Processamento de compósitos termoestruturais de carbono reforçado com fibras de carbono

Processing of thermo-structural carbon-fiber reinforced carbon composites

Luiz Cláudio Pardini1  * 

Adriano Gonçalves2 

1Institute of Aeronautics and Space, São José dos Campos- Brazil. pardini@iae.cta.br

2Institute of Aeronautics and Space, São José dos Campos- Brazil. adriano@iae.cta.br


Resumo:

O presente trabalho descreve os processos de obtenção de compósitos termoestruturais de carbono reforçado com fibras de carbono. O processamento desses materiais tem início pela definição de uma arquitetura do reforço de fibras de carbono, seja na forma de empilhamento simples do reforço, de tecidos ou na forma de reforço multidirecional. A incorporação de matriz carbonosa no reforço de fibras, pelo preenchimento de vazios e interstícios, promove a densificação do material, e o incremento de massa específica. Duas rotas de processamento são predominantes na obtenção desses materiais, o processo via impregnação líquida e o processo via impregnação em fase gasosa. Em ambos os casos, processos térmicos levam à formação de matriz de carbono com propriedades específicas, que derivam de seus materiais precursores. Os processos diferem entre si, também, pelo rendimento, enquanto os processos executados por impregnação líquida apresentam rendimento de, aproximadamente, 45%, os processos por impregnação em fase gasosa apresentam rendimento em torno 15%.

Palavras-chave: Compósitos carbono/carbono; Processamento; Fibras de carbono; Pirólise; Gargantas de tubeira de foguete

Abstract:

The present work describes the processes used to obtain thermostructural Carbon/Carbon composites. The processing of these materials begins with the definition of the architecture of the carbon fiber reinforcement, in the form of stacked plies or in the form of fabrics or multidirectional reinforcement. Incorporating fiber reinforcement into the carbon matrix, by filling the voids and interstices, leads to the densification of the material and a continuous increase in density. There are two principal processing routes for obtaining these materials: liquid phase processing and gas phase processing. In both cases, thermal processes lead to the formation of a carbon matrix with specific properties related to their precursor. These processes also differ in terms of yield. With liquid phase impregnation the yield is around 45 per cent, while gas phase processing yields around 15 per cent.

Keywords: Carbon-carbon composites; Processing; Carbon fibers; Pyrolysis; Rocket nozzle throat

Texto completo disponível apenas em PDF.

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Recebido: 20 de Agosto de 2009; Aceito: 06 de Outubro de 2009

* author for correspondence

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