Development of thermal protective seal for hot structure control surface actuator rod

Infed, Farid; Handrick, K.; Lange, Hans I.; Steinacher, A.; Weiland, Silvio; Wegmann, C.

doi:10.1016/j.actaastro.2011.06.017

Cited by 13 publications

(5 citation statements)

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“…The failure of the heat seal resulted in the penetration of hot engine gases into the fuselage, cutting off communication between the vehicle and flight controllers. The current approaches to addressing such challenges involve combining materials that have compressibility, such as springs, with materials that have thermal insulation, such as high-temperature-resistant ceramics, but this does nothing for gaps beyond the elastic range. − Dynamic gap sealing has become one of the major challenges for the thermal protection system (TPS) of future aerospace vehicles.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Composite with Self-Adaptive Anisotropic Deformation for Thermal Protection System

Chi,

Heng,

Yan

et al. 2024

ACS Appl. Mater. Interfaces

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Rigid thermal protection materials such as ultrahigh-temperature ceramics are desirable for applications in aerospace vehicles, but few materials can currently satisfy the emerging high-temperature sealing requirements for dynamic gaps created by the mismatch of the thermal expansion of different protection layers. Here, we design and fabricate a flexible biomimetic anisotropic deformation composite by multilayer cocuring onto fiber fabrics. It displays superior anisotropic deformation, whose longitudinal expansion ratio is 48 times greater than the transverse expansion ratio at specific temperatures. Furthermore, the ordered carbon structure created by transitionmetal-catalyzed graphitization and the C/Si synergistic effect resulting from the combination of biomimetic fiber fabrics and SR enable the in situ formation of a high-temperature-resistant SiC crystalline phase within the char layer, ultimately resulting in exceptional thermal protection properties. By constructing hollow structures in situ, the back temperature of the composite, which is only 4.33 mm thick, is stabilized at 140 °C under the condition of continuous butane flame ablation (1300 °C) for 420 s. Multilayer structure and flexible features can facilitate large-scale preparation and arbitrary cutting and bending, adapted to different thermal protection areas.

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Section: Introductionmentioning

confidence: 99%

Hierarchical Composite with Self-Adaptive Anisotropic Deformation for Thermal Protection System

Chi,

Heng,

Yan

et al. 2024

ACS Appl. Mater. Interfaces

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show abstract

“…Thermal sealing [1][2][3][4] is one of the critical thermal protection systems in aerospace, energy and mechanical elds that uses sealing materials to ll the gaps in joints to prevent serious or even catastrophic thermal runaway. The working environments of sealing materials are usually very harsh, 5,6 such as high temperatures over 1000 °C, large thermal shocks and highfrequency vibrations in spacecras, furnaces, engines, etc., requiring materials with high thermomechanical properties and low thermal conductivity (k) to guarantee the system safety.…”

Section: Introductionmentioning

confidence: 99%

Medium-entropy ceramic aerogels for robust thermal sealing

Liu

Deng

et al. 2023

J. Mater. Chem. A

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“…The fibers used to obtain fibrous composite materials (carbon, aramid, glass and others) have high values of tensile strength, a modulus of elasticity, heat resistance and low density [ 1 , 2 ]. These properties make fibers indispensable components in the creation of structural composite materials based on thermoplastic and thermoset binders, which are widely used in various industries: space, aviation, shipbuilding, automotive, and many others [ 3 , 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…In addition to solving the technological problem, the finishing layer must have strong adhesion to the fiber, and must ensure the fiber wetting by the binder. In order to increase the surface energy of the fiber in the absence of a finishing coating, the methods of physicochemical modification are often used [ 1 , 8 ]: plasma and ultrasound treatment, gamma radiation, ultraviolet radiation, and chemical and electrochemical treatment. Such processing methods allow us to increase the amount of oxygen-containing groups on the fiber surface, which leads to the increase of the polar component of the surface energy.…”

Section: Introductionmentioning

confidence: 99%

Epoxyorganosilane Finishing Compositions for Fibrous Fillers of Thermosetting and Thermoplastic Binders

Shapagin¹,

Gladkikh²,

Poteryaev³

et al. 2021

Polymers

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The development of universal finishing compositions for fibers of various natures is an urgent task for polymer composite materials science. The developed finishes can be used for the fiber reinforcement of polymer matrices with a wide range of surface free energy characteristics. Epoxy systems modified with diaminesilane in a wide concentration range were examined by optical interferometry, FTIR spectroscopy, DSC and the sessile drop technique. It was shown that the partial curing of epoxy resin by diaminesilane at room temperature under an inert atmosphere, followed by contact with air, leads to a significant increase of the surface free energy of the system. Varying the concentration of diaminesilane allows us to effectively regulate the surface free energy of the composition. This makes it possible to use fibers finished with epoxyaminosilane compositions in composite materials based on a various thermosetting and thermoplastic binders with a surface tension of up to 75 mJ/m2.

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Development of thermal protective seal for hot structure control surface actuator rod

Cited by 13 publications

References 0 publications

Hierarchical Composite with Self-Adaptive Anisotropic Deformation for Thermal Protection System

Hierarchical Composite with Self-Adaptive Anisotropic Deformation for Thermal Protection System

Medium-entropy ceramic aerogels for robust thermal sealing

Epoxyorganosilane Finishing Compositions for Fibrous Fillers of Thermosetting and Thermoplastic Binders

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