Degradation of carbon-based materials under ablative conditions produced by a high enthalpy plasma jet
AUTOR(ES)
Petraconi, Gilberto, Essiptchouk, Alexei Mikhailovich, Charakhovski, Leonid Ivanovich, Otani, Choyu, Maciel, Homero Santiago, Pessoa, Rodrigo Sávio, Gregori, Maria Luisa, Costa, Sônia Fonseca
FONTE
J. Aerosp. Technol. Manag.
DATA DE PUBLICAÇÃO
2010-04
RESUMO
Abstract: A stationary experiment was performed to study the degradation of carbon-based materials by immersion in a plasma jet. In the experiment, graphite and C/C composite were chosen as the target materials, and the reactive plasma jet was generated by an air plasma torch. For macroscopic study of the material degradation, the sample's mass losses were measured as function of the exposure time under various temperatures on the sample surface. A microscopic analysis was then carried out for the study of microscopic aspects of the erosion of material surface. These experiments showed that the mass loss per unit area is approximately proportional to the exposure time and strongly depends on the temperature of the material surface. The mass erosion rate of graphite was appreciably higher than the C/C composite. The ablation rate in the carbon matrix region in C/C composite was also noticeably higher than that in the fiber region. In addition, the latter varied according to the orientation of fibers relatively to the flow direction. These tests indicated an excellent ablation resistance of the C/C composite, thus being a reliable material for rocket nozzles and heat shielding elements of the protection systems of hypersonic apparatuses from aerodynamic heating.
Documentos Relacionados
- Preparation of Fluorescent Carbon-Based Dots from Waste Tire Pyrolysis
- Mechanical and Microstructural Response of an Aluminum Nanocomposite Reinforced with Carbon-Based Particles
- Development of carbon-based nanomaterials indicators using the analytical tools and data provided by the web of science database
- Selenostannylation of arynes produced by silylaryl triflates under mild reaction conditions
- NANOMATERIAIS ELETRÓDICOS A BASE DE CARBONO COM Ni(II)(PAN)2 PARA OXIDAÇÃO ELETROQUÍMICA DE ETANOL EM MEIO ALCALINO