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The Influence of Metal Reinforcement upon the Ablative Properties of Multi-Layered Composites

Przybyłek Paweł, Komorek Andrzej, Szczepaniak Robert

Advances in Science and Technology. Research Journal

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2023

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Vol. 17, no 2

111--119

EN

Fibre-metal laminates combine both the properties of metal and composite materials, reinforced with fibres; first such laminates already appeared at the end of the 70s. Alongside with the emergence of spacecraft, in which the external plating heats up to temperatures even exceeding 3000 °C, there was a demand for new materials, with increased thermal resistance. Moreover, high thermal resistance is also required in the construction of different protective casings for sensitive equipment, e.g. flight data recorders. In order to protect a spacecraft from massive amounts of heat This article presents research findings, aimed at determining the influence of including metal reinforcement in the form of steel sheet upon the thermal resistance of a multi-layered polymer composite. The samples were exposed to a mixture of hot gases at a temperature of over 900 °C for a period of approximately 150 s. The most important parameter determined on the basis of experimental research was the temperature of the rear surface of the sample. It was observed, that the addition of metal reinforcement causes stabilization of the temperature of the back wall of the sample and a decrease in temperature of the rear wall surface of the insulating sample by approximately 45% and approximately 2-fold increase in the ablative mass loss.

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The analysis of the properties of ablative composites with carbon and MMT nanofiller reinforcement

Szczepaniak R., Czubak K., Przybyłek P., Stabryn S.

Journal of KONES

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2017

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Vol. 24, No. 4

305--312

EN

One of the most important parameters in the selection of composite materials used for the protection of avionics instruments exposed to high temperatures are ablative properties. They constitute the main criterion in determining the composition and thickness of the protective material. In this article, the authors determine the ablative properties of a polymer matrix with carbon reinforcement and check the effect of using the MMT additive (montmorillonite) on the change in the resistance to the impact of a high heat flux. The tested materials play an important role in the defence, aviation and space industry. Ablative materials are the only ones to protect the rear wall surface from an excessive temperature rise while using a thin insulation wall. For the sake of the research, we prepared a series of samples of the composite produced with epoxy resin LH 145, H 147 hardener, carbon fibre mats and the addition of MMT. The prepared samples were tested on a unique stand in laboratory conditions. The findings obtained from the experimental testing after a detailed analysis were tabulated and presented in the form of graphs. The authors determined the ablative loss of mass of the individual samples, compared their internal temperatures, which had been measured with thermocouples, as well as the temperature on the backside of the sample. In addition, in order to complement the experimental studies of determining the temperature rise on the rear surface, the authors used a thermal imaging camera. Besides, they took photos of different layers of the examined structure, which had been exposed, to a heat stream, by means of a scanning microscope.

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Ablacyjne właściwości termoochronne epoksydowych kompozytów przekładkowych

Kucharczyk W., Przybyłek P.

Przetwórstwo Tworzyw

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2012

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[R.] 18, nr 3

235-239

PL

W artykule przedstawiono wyniki badań ablacyjnych właściwości termoochronnych kompozytów epoksydowych z aluminiową strukturą nośną typu "plaster miodu" i napełniaczami proszkowymi (karborundem SiC, korundem Al2O3, roztworem stałym 50WC50TiC oraz proszkiem wolframu W). Opisano jakościowy i ilościowy wpływ zmiennych fazowych składów kompozytów na badane właściwości ablacyjne: temperaturę tylnej powierzchni ścianki próbki izolującej ts, średnią szybkość ablacji va oraz ablacyjny ubytek masy Ua.

EN

The paper reports results of studies on ablative and thermal properties of epoxy sandwich composites with aluminates' honeycomb structure filed with a mixture of epoxy resin and powder fillers (SiC, Al2O3, solid solution 50WC50TiC and tungsten W). Quantitative and qualitative influences of phase type-matter on ablative properties were presented. The composites were treated with hot combustion gases to detect the temperature profiles across the studied samples (cubes 10 x 25 x 35 mm), the average linear rate of ablation va and their mass waste Ua during ablation processes.

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Wpływ komponentów na właściwości ablacyjne hybrydowych laminatów termoutwardzalnych

Kucharczyk W., Żurowski W.

Problemy Techniki Uzbrojenia

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2003

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R. 32, z. 86

137--146

PL

W artykule przedstawiono charakterystykę, plan badań doświadczalnych termoutwardzalnych laminatów hybrydowych o właściwościach ablacyjnych, metodykę prowadzonych badań cech termo ochronnych, wyniki badań oraz ich analizę i wnioski. Określono jakościowy i ilościowy wpływ komponentów (proszek Al2O3, pył węglowy, tkanina szklana – jako materiał osnowy termoutwardzalnej – żywice fenolowo-formaldehydowe rezolowe i nowolakowe) na prędkość destrukcji termicznej kompozytu.

EN

The searching plan of heat-hardening hybrid laminates about ablation properties were introduced, testing methods, results of investigations as well as theirs analysis and conclusions. It was qualitative and quantitative of components (Al2O3 and C, Glass fabric as material of amplifications and of fulfilment as – as material of heat-hardening warp – resins) onto Speer of thermal destruction of laminate.