An oxidation protective double layered coating was deposited on a carbon–carbon composite (C/C) using a simple and low cost method. A surface modification of the C/C was obtained by direct reaction of liquid silicon with the C/C, promoting the formation of a 5–10 μm β-SiC layer on the composite surface. The inner layer, in contact with the C/C, is a composite made with a barium borosilicate glass matrix (SABB) and boron carbide particles; the outer layer is another composite layer formed by a SABB glass matrix and yttrium oxide particles. The layers are deposited by a slurry technique. Oxidation tests were carried out in a furnace in air, in order to verify the coating stability and its effectiveness. No mass loss of the C/C composite was observed after 100 h at 1200°C, while after 150 h at 1300°C the C/C mass loss did not exceed 1%.
Oxidation protective multilayer coatings for carbon-carbon composites / Smeacetto, Federico; Salvo, Milena; Ferraris, Monica. - In: CARBON. - ISSN 0008-6223. - 40:4(2002), pp. 583-587. [10.1016/S0008-6223(01)00151-8]
Oxidation protective multilayer coatings for carbon-carbon composites
SMEACETTO, FEDERICO;SALVO, Milena;FERRARIS, Monica
2002
Abstract
An oxidation protective double layered coating was deposited on a carbon–carbon composite (C/C) using a simple and low cost method. A surface modification of the C/C was obtained by direct reaction of liquid silicon with the C/C, promoting the formation of a 5–10 μm β-SiC layer on the composite surface. The inner layer, in contact with the C/C, is a composite made with a barium borosilicate glass matrix (SABB) and boron carbide particles; the outer layer is another composite layer formed by a SABB glass matrix and yttrium oxide particles. The layers are deposited by a slurry technique. Oxidation tests were carried out in a furnace in air, in order to verify the coating stability and its effectiveness. No mass loss of the C/C composite was observed after 100 h at 1200°C, while after 150 h at 1300°C the C/C mass loss did not exceed 1%.Pubblicazioni consigliate
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https://hdl.handle.net/11583/1400334
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