The oxidation behaviour of two- and three-dimensional C/SiC thermostructural materials protected by chemical-vapour-deposition polylayers coatings

Goujard, S.; Vandenbulcke, L.; Tawil, H.

doi:10.1007/bf00354562

Cited by 75 publications

(34 citation statements)

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“…One can note already here that thick coatings were employed. A good protection is also obtained with this coating type on C/SiC composites [24]. A vitreous phase appears clearly in the cracks that were opened again when returning down to ambient temperature, either in the middle or on one side of the glass layer ( fig.…”

Section: C5-738mentioning

confidence: 65%

“…JOURNAL DE PHYSIQUE I V All these layers were deposited by CVD [23,24] in conditions which are relatively classical from methyltrichlorosilane (MTS)+H2 and BClj+H2(+CH4). Figure 3 shows that such a multilayer coating deposited on a C/C composite can be efficient in a large range of temperature, even here for cyclic oxidation, or under flexural loading [23].…”

Section: C5-738mentioning

confidence: 99%

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Silicon and Boron Containing Components by CVD and CVI for High Temperature Ceramic Composites

Vandenbulke

Leparoux

1995

J. Phys. IV France

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Section: C5-738mentioning

confidence: 65%

Section: C5-738mentioning

confidence: 99%

Silicon and Boron Containing Components by CVD and CVI for High Temperature Ceramic Composites

Vandenbulke

Leparoux

1995

J. Phys. IV France

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“…Next, two layer of Si-B-C matrix and two layer of SiC matrix were infiltrated alternatively in sequence for specimen with density of 1.7 g/cm 3 , then, three layers of SiC coating were deposited on specimen, which was marked as C/(SiC-SiBC) m . In addition, SiC/Si-B-C/SiC coating was deposited on C/SiC composites with density of 1.9 g/cm 3 marked as SBS-C/SiC [13]. There were three samples tested at each specific temperature for C/(SiC-SiBC) m and SBS-C/SiC.…”

Section: Fatigue Performancementioning

confidence: 99%

“…Carbon fiber reinforced SiC matrixes composites (C/SiC) have been extensively studied due to attractive properties, such as low density and high specific strength . Recently, C/SiC composites are promising materials for many applications, especially for aircraft engineer thermo-structural components [10][11][12][13]. However, oxidation of carbon fiber and interface pyrolytic carbon occurs much easily and limits long-term application for C/SiC composites in severe high temperature oxidizing environment [14][15].The C/SiC modified with boron bearing species, such as borosilicate glass,boron,boron carbide and Si-B-C ceramic, shows excellent self-healing property, especially with Si-B-C ceramic.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Ceramic Matrix Composites

2017

IJAERD

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“…La composición del vidrio debe elegirse teniendo en cuenta su coeficiente de expansión térmica, el intervalo de temperatura en el que presenta un comportamiento viscoplástico (log η = 7-11) para sellar grietas y absorber tensiones, y la reactividad química con las capas adyacentes (9)(10)(11).…”

Section: Introductionunclassified

Protección contra la oxidación de materiales compuestos SiC(C/SiC) mediante la combinación de recubrimientos de silicatos de itrio y sílice

Aparicio¹,

Durán²

2001

Bol. Soc. Esp. Ceram. Vidr.

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El principal inconveniente para la utilización de los materiales compuestos C/SiC en aplicaciones estructurales de alta temperatura es la elevada velocidad de oxidación de la fibra de carbono por encima de 450°C (1). Por esta razón, es necesario el desarrollo de recubrimientos capaces de proteger de la oxidación a estos materiales durante periodos prolongados a temperaturas de hasta 1600°C. Habitualmente, los recubrimientos están formados por multicapas con características antioxidantes complementarias. El objetivo de este trabajo ha sido el desarrollo de un recubrimiento multicapa formado por una capa interior de SiC, una intermedia de silicatos de itrio: Y 2 Si 2 O 7 y Y 2 SiO 5 , y una exterior de SiO 2 . En su procesamiento se han empleado diferentes técnicas: pulverizado con soluciones de policarbosilanos, inmersión en suspensiones coloidales y técnica solgel, respectivamente. Se ha analizado la influencia sobre la resistencia a la oxidación del material, y se ha realizado un estudio microestructural por MEB previo y posterior al ensayo de oxidación. Las presencia de fisuras en la capa interior de SiC origina una resistencia a la oxidación muy reducida a baja temperatura. Solamente cuando el substrato está protegido por la triple capa la reducción de la velocidad de oxidación es considerable y la pérdida de peso se reduce del 50%, cuando el substrato está protegido por la capa de SiC, al 15% con la triple capa. Palabras clave: SiC(C/SiC), silicatos de itrio, SiO 2 , recubrimientos, resistencia a la oxidación Oxidation protection of SiC(C/SiC) composite material by combination of yttrium silicates and silica coatingsThe factor which currently precludes the use of carbon fibre reinforced silicon carbide (C/SiC) in high temperature structural applications is the oxidation of carbon fibres at temperatures greater than 450°C (1). For this reason, it is necessary to develop coatings capable of protecting C/SiC components from oxidation for extended periods at 1600°C. Conventional coatings consist of multilayers of different materials with complementary antioxidant properties. The objective of this work was to develop a multilayer coating consisted by a bonding layer of SiC, a intermediate layer of yttrium silicates: Y 2 Si 2 O 7 and Y 2 SiO 5 , and an external layer of SiO 2 . Different techniques have been used to prepare the layers: painting with policarbosilane solutions, slip-coating and sol-gel, respectively. The behaviour against oxidation of coated composite material has been evaluated, and the samples before and after oxidation has been characterised by SEM. The cracking of SiC coating leads to a very low oxidation resistance at low temperatures. Only when the substrate is protected by the trilayer coating the reduction of the oxidation rate is considerable, and the weight loss is reduced from 50% (with a SiC coating) to 15%.

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The oxidation behaviour of two- and three-dimensional C/SiC thermostructural materials protected by chemical-vapour-deposition polylayers coatings

Cited by 75 publications

References 0 publications

Silicon and Boron Containing Components by CVD and CVI for High Temperature Ceramic Composites

Silicon and Boron Containing Components by CVD and CVI for High Temperature Ceramic Composites

An Overview of Ceramic Matrix Composites

Protección contra la oxidación de materiales compuestos SiC(C/SiC) mediante la combinación de recubrimientos de silicatos de itrio y sílice

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