Ablative and mechanical properties of quartz phenolic composites

Gregori, Maria Luisa; Barros, Edson A.; Filho, Gilberto Petraconi; Pardini, Luiz Carlos; Costa, Sônia Fonseca

doi:10.5028/jatm.2009.01016368

Cited by 6 publications

(3 citation statements)

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“…The studied material samples were processed by Plastflow Ltd, Curitiba, Brazil, from a regular fabric, about 0.9 mm thick, of pure silica with an areal mass of 680 g/m 2 and a phenolic resin with 165 mPa s viscosity, used at room temperature to obtain the prepreg material [6]. Two configurations of the silica fiber reinforcement were studied (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Among them, silica-phenolic composites have shown excellent thermal performances [2], and very good ablation resistance [3,4]. In order to reduce processing costs and to optimize the material with respect to its mission, recent works [5,6] have focused on the fabrication and characterization of composites in which the reinforcement is in the form of discontinuous chopped fabric pieces. This kind of improvement has been studied on aramid/epoxy composites [7], and more generally on polymer-matrix composite prepregs for damage tolerance through mechanical testing [8].…”

Section: Introductionmentioning

confidence: 99%

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Thermographic and tomographic methods for tridimensional characterization of thermal transfer in silica/phenolic composites

Bresson

Ahmadi-Sénichault

Caty

et al. 2016

Composites Part B: Engineering

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Silica/phenolic composite materials are often used in thermal protection systems (TPS) for atmospheric re-entry. The present work aims to compare two different approaches to assess heat transfer properties of these materials: i) using standard and specific experimental methods, and ii) with the development of 3D thermal transfer multiscale model using 2D (microscopy) and 3D (tomography) images. The latter procedure, based on computations on images, is a two-step change of scale from microscopic scale to mesoscopic scale and then to the macroscopic one. Two silica/phenolic composites with different spatial organizations are studied and their thermal properties are compared. Several experimental methods have been used, including space-resolved diffusivity determinations. Numerical results are compared to experimental ones in terms of transverse and longitudinal thermal conductivities of the composites, and were found to be in good agreement. A discussion is made on the different possible sources of uncertainty for both methods.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermographic and tomographic methods for tridimensional characterization of thermal transfer in silica/phenolic composites

Bresson

Ahmadi-Sénichault

Caty

et al. 2016

Composites Part B: Engineering

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“…The increase of porosity postpones the densification process of phenolic nanoparticles. In general, NPCs have stronger mechanical strength and even lighter density compared to carbon/ phenolic, 19,20 quartz/phenolic, 21,22 PICA, 23 and phenolic aerogel composites, 24 as shown in Figure 3f.…”

Section: Mechanical Behaviorsmentioning

confidence: 96%

Co-Optimizing Insulative and Mechanical Properties of Quartz Fabric Reinforced Phenolic Composites by a Compromising Porous Structure for Thermal Insulation

Qian

Cai

Wang

et al. 2023

Ind. Eng. Chem. Res.

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Introducing porosity into structures is recognized as a practical strategy to achieve lightweightness and insulation for ablatives, but reduced matrix density leads to the weakening of mechanical and anti-ablation performances. Herein, a trade-off design of the porous structure is developed for integrating high-strength, insulation, and anti-ablation abilities into mid-density nanoporous phenolic composites (NPC). Benefiting from a narrow nanopore size (20–62 nm) of the matrix, thermal conductivity of NPC can be effectively limited within 0.079–0.115 W/(m·K), while showing a mid-density of 0.89–1.04 g/cm3. Meanwhile, NPC shows a considerable axial tensile strength of 130.2–177.8 MPa and out-of-plane compressive strength of ∼300 MPa due to the compromising porosity (34–62%) and reinforcing of the 3D needle-punched quartz fiber preform. Besides, NPC exhibits excellent oxidation resistance in static radiation heating (1000 °C) and outstanding insulation and ablation resistance under an oxy-acetylene heat flux of 1.76 and 4.18 MW/m2 with the linear ablation rates of ∼0.102 and ∼0.185 mm/s, respectively. The results will further promote the development and application of phenolic ablatives in extreme re-entry environments.

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Development and properties of advanced composites based on cork and nanometric silicon carbide-filled phenolic resin

Pelin

Stefan

et al. 2018

Bull Mater Sci

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This paper presents the obtaining of advanced materials based on cork powder as reinforcement and phenolic resin (PR) with silicon carbide (nSiC) nanofiller as matrix with potential applications in aerospace industry. Three formulations were obtained: one control sample PR/cork with no nanofiller, two nanofilled samples with 1 and 2 wt% nSiC loadings into the resin. The materials were tested by flexural and compressive mechanical tests to determine their strength and stiffness, to determine their friction coefficient by tribological tests, to determine their thermal decomposition behaviour by TG-DSC analysis and to evaluate their thermal behaviour by thermal shock tests when subjected to extreme temperature directly from room temperature. The material structure was analysed by SEM visualizing the fracture cross-section after mechanical testing. The test results illustrate that silicon carbide nanoparticles improve flexural and compressive strength, but also stiffness and friction coefficient, delay thermal decomposition onset and improve thermal shock resistance. All these sustain the PR/nSiC/cork materials as potential advanced materials candidates for thermal protection applications.

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Ablative and mechanical properties of quartz phenolic composites

Cited by 6 publications

References 1 publication

Thermographic and tomographic methods for tridimensional characterization of thermal transfer in silica/phenolic composites

Thermographic and tomographic methods for tridimensional characterization of thermal transfer in silica/phenolic composites

Co-Optimizing Insulative and Mechanical Properties of Quartz Fabric Reinforced Phenolic Composites by a Compromising Porous Structure for Thermal Insulation

Development and properties of advanced composites based on cork and nanometric silicon carbide-filled phenolic resin

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