Low Density Syntactic Foam Composites as Ablative TPS Material for High Heat Flux Conditions for Reentry Missions

Chandran, M. Satheesh; Sunitha, K.; Bhaskar, N. Uday; Kumar, Krishna; Sreenivas, N.; Mathew, Dona

doi:10.1007/s41403-021-00217-y

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…The study reveals that the performance of silica fibre reinforced system is found to be better than their carbon fibre reinforced counterparts. 20…”

Section: Phenolic Syntactic Foamsmentioning

confidence: 99%

“…The study reveals that the performance of silica fibre reinforced system is found to be better than their carbon fibre reinforced counterparts. 20 Huang et al 21 reported amino microsphere based phenolic syntactic foams reinforced with two types of chopped fibres viz. aramid (Kevlar-49) and carbon (C-30) of average lengths, ∼12 and ∼24 mm.…”

Section: Modified Phenolic Syntactic Foamsmentioning

confidence: 99%

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Phenolic syntactic foams: Low-density composites for structural and thermostructural applications

John

Nair

2022

Cellular Polymers

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Syntactic foams, low density composites consisting of hollow microballoons or microspheres dispersed in a matrix, find application in various fields. The properties of these light weight composites can be easily tuned by suitably selecting the matrix and the hollow microsphere filler and their composition. Among the various matrices employed in syntactic foams, phenolic resins have enticed the researchers owing to their salient features viz. high thermal stability, high char yield, structural integrity etc. This review gives an overview of phenolic syntactic foams with a focus on various phenolic resin based syntactic foams and modified syntactic foams. Finally, applications of phenolic syntactic foams are also covered.

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“…The study reveals that the performance of silica fibre reinforced system is found to be better than their carbon fibre reinforced counterparts. 20…”

Section: Phenolic Syntactic Foamsmentioning

confidence: 99%

Section: Modified Phenolic Syntactic Foamsmentioning

confidence: 99%

Phenolic syntactic foams: Low-density composites for structural and thermostructural applications

John

Nair

2022

Cellular Polymers

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“…The high-temperature thermo-chemical non-equilibrium gas flows due to the high speed, i.e., Mach number > 5, cause extremely complicated heterogeneous interactions, such as surface catalysis, oxidation, and ablation, between the gas and TPS materials [ 6 , 7 , 8 ]. Silica is an important material that has been widely used in non-ablative TPS [ 9 , 10 ], which has the characteristics of thermostability, anti-ablative, and shock resistance [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis of the Catalysis Recombination Mechanism on Nanoscale Silica Surfaces

Cui

Sun

et al. 2022

Nanomaterials

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A deep understanding of surface catalysis recombination characteristics is significant for accurately predicting the aeroheating between hypersonic non-equilibrium flow and thermal protection materials, while a de-coupling sensitivity analysis of various influential factors is still lacking. A gas–solid interface (GSI) model with a hyperthermal flux boundary was established to investigate the surface catalysis recombination mechanisms on nanoscale silica surfaces. Using the reactive molecular dynamics (RMD) simulation method, the effects of solid surface temperature, gas incident angle, and translational energy on the silica surface catalysis recombination were qualified under hyperthermal atomic oxygen (AO), atomic nitrogen (AN), and various AN/AO gas mixtures’ influence. It can be found that, though the Eley–Rideal (E–R) recombination mechanism plays a dominant role over the Langmuir–Hinshelwood (L–H) mechanism for all the sensitivity analyses, a non-linear increasing pattern of AO recombination coefficient γO2 with the increase in incident angle θin and translational energy Ek is observed. Compared with the surface catalysis under hyperthermal AO impact, the AN surface adsorption fraction shows an inverse trend with the increase in surface temperature, which suggests the potential inadequacy of the traditional proportional relationship assumptions between the surface adsorption concentration and the surface catalysis recombination coefficient for other species’ impact instead of AOs. For the incoming bi-component AO/AN gas mixtures, the corresponding surface catalysis coefficient is not the simple superposition of the effects of individual gases but is affected by both the intramolecular bond energies (e.g., O2, N2) and intermolecular energies (e.g., Si/N, Si/O).

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Investigations on Phthalonitrile – Cyanate ester blends and their light weight composites; Synthesis, thermal, mechanical and ablative characteristics

Sreelal

Sunitha

Sreenivas

et al. 2023

Materials Chemistry and Physics

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Low Density Syntactic Foam Composites as Ablative TPS Material for High Heat Flux Conditions for Reentry Missions

Cited by 4 publications

References 1 publication

Phenolic syntactic foams: Low-density composites for structural and thermostructural applications

Phenolic syntactic foams: Low-density composites for structural and thermostructural applications

Sensitivity Analysis of the Catalysis Recombination Mechanism on Nanoscale Silica Surfaces

Investigations on Phthalonitrile – Cyanate ester blends and their light weight composites; Synthesis, thermal, mechanical and ablative characteristics

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