Comparison of ablative and compressive mechanical behavior of several PICA-like ablative materials

Zhang, Jun; Yang, Lingwei; Wei, Li; Hong, Changqing; Meng, Sheng

doi:10.1007/s11431-020-1618-2

Cited by 10 publications

(2 citation statements)

References 24 publications

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“…Carbon-phenolic ablative materials are unconventional composite materials consisting of a phenolic resin and a carbon felt. They have a very porous structure, and the quantity of phenolic resin has to be very low in order to preserve the lightness and the porosity of the final material [3][4][5]. The role of the phenolic resin is to improve the mechanical resistance of the carbon felt and to dissipate the heat by endothermic reactions of pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Thermochemical characterization of polybenzimidazole with and without nano-ZrO2 for ablative materials application

Paglia

Genova

Bracciale

et al. 2020

J Therm Anal Calorim

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During the ballistic atmospheric re-entry, a space vehicle has to withstand huge thermo-mechanical solicitations because of its high velocity and the friction with the atmosphere. According to the kind of the re-entry mission, the heat fluxes can be very high (in the order of some MW m−2) ;thus, an adequate thermal protection system is mandatory in order to preserve the structure of the vehicle, the payload and, for manned mission, the crew. Carbon phenolic ablators have been chosen for several missions because they are able to dissipate the incident heat flux very efficiently. Phenolic resin presents satisfying performance but also environmental drawbacks. Thus, a more environmental-friendly solution was conceived: a high-performance thermoplastic material, polybenzimidazole (PBI), was employed instead of phenolic resin. In this work PBI-ablative material samples were manufactured with and without the addition of nano-ZrO2 and tested with an oxyacetylene flame. For comparison, some carbon-phenolic ablators with the same density were manufactured and tested too. Thermogravimetric analysis on PBI samples was carried out at different heating rates, and the obtained TG data were elaborated to evaluate the activation energy of PBI and nano-filled PBI. The thermokinetics results for PBI show an improvement in thermal stability due to the addition of nano-ZrO2, while the oxyacetylene flame test enlightens how PBI ablators are able to overcome the carbon phenolic ablators performance, in particular when modified by the addition of nano-ZrO2.

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Section: Introductionmentioning

confidence: 99%

Thermochemical characterization of polybenzimidazole with and without nano-ZrO2 for ablative materials application

Paglia

Genova

Bracciale

et al. 2020

J Therm Anal Calorim

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“…Phenolic impregnated carbon ablator (PICA) had extremely low-density and thermal conductivity attributing to its pore structures in resin, resulting its heat insulation performance rising. [16][17][18] But it was not the candidate used in oxidative, long time and high-flux environment because of its severe surface recession. With the development of aerospace technology, future hypersonic aircrafts will be subjected to more severe aerothermodynamic environment, requiring TPS exhibiting both heat insulation and ablation resistance.…”

Section: Introductionmentioning

confidence: 99%

Heat insulation and ablation resistance performance of continuous fiber reinforced composites with integrated gradient fabric

Zhang

Zhu³

et al. 2022

Polymer Composites

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The continuous fiber reinforced porous resin‐based composites with integrated gradient fabric (CPIGF) were successfully prepared. From the bottom to the top surface, the fiber volume fraction of the integrated fabric gradually increased, as well as the fabric architecture changed, meanwhile the porosity of the resin gradually decreased. The temperature in the inner composite increased quite slowly during ablation, and the linear ablation rate ranged from 0.019 mm/s to 0.029 mm/s. The simulation results showed that the good heat insulation capacity of CPIGFs was attributed to the anisotropy properties of the fabric architecture. The microstructure analysis showed that the good ablation resistance came from both the thermal expansion of the integrated gradient fabric and the densification of the zone with 3D orthogonal woven fabric. This work is helpful for designing thermal protection materials having both heat insulation and ablation resistance for hypersonic aircrafts.

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Controllable pre-oxidation strategy toward achieving high compressive strength in self-bonded carbon fiber monolith

et al. 2023

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Comparison of ablative and compressive mechanical behavior of several PICA-like ablative materials

Cited by 10 publications

References 24 publications

Thermochemical characterization of polybenzimidazole with and without nano-ZrO2 for ablative materials application

Thermochemical characterization of polybenzimidazole with and without nano-ZrO2 for ablative materials application

Heat insulation and ablation resistance performance of continuous fiber reinforced composites with integrated gradient fabric

Controllable pre-oxidation strategy toward achieving high compressive strength in self-bonded carbon fiber monolith

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