A Study of Metal-Ceramic Composite Foams Combustibility

Gawdzińska, K.; Chybowski, Leszek; Nabiałek, M.; Szymański, Paweł

doi:10.12693/aphyspola.135.304

Cited by 9 publications

(8 citation statements)

References 2 publications

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“…Production areas can be contaminated with a variety of chemical emissions. For example, during the transport of coal and biomass, emissions of carbon monoxide (CO) and hydrocarbons (HC) are widespread 37 , 38 . This consequence is due to the phenomena occurring in these materials, e.g., gasification (CO and H 2 emission), rot (CO emission) and fermentation (emission of H 2 , CH 4 and complex hydrocarbons) 35 .…”

Section: Discussionmentioning

confidence: 99%

Chemical compounds released by combustion of polymer composites flat belts

Krawiec

Warguła

Czarnecka‐Komorowska

et al. 2021

Sci Rep

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Machines and devices for the production, transport and segregation of products are placed in production and storage rooms. Flat conveyor and drive belts are very often used for their construction. Due to heavy loads and difficult operating conditions, these belts can catch fire and, as a result, become the main source of air contaminants harmful to human health and life. This article examines the emission level of toxic chemical compounds most often produced during the thermal decomposition and combustion of flat drive and conveyor belts. Six types of flat belts, which were made of various polymer materials, i.e., polyamide, rubber, and polyurethane, and were pyrolyzed in a tube furnace at 950 °C, were tested for emission. Using an Fourier transform infrared spectroscopy gas analyser, five gaseous products of combustion were identified, i.e., carbon mono oxide, carbon dioxide, hydrogen cyanide, hydrogen bromide and sulfur dioxide (SO2). Chemical analysis showed that SO2 compounds and hydrogen bromide were present in only two samples. The test results indicate that gas emission concentration limits for all the tested belts were significantly exceeded. A comparative analysis of the concentration limits of V-belts described in the authors' earlier works shows that flat belts demonstrate lower emission levels of harmful compounds than V-belts. In addition, research has shown that compared to traditional rubber-based belts, belts made of modern materials exhibit no emission of hydrogen chloride compounds during thermal decomposition and combustion.

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Section: Discussionmentioning

confidence: 99%

Chemical compounds released by combustion of polymer composites flat belts

Krawiec

Warguła

Czarnecka‐Komorowska

et al. 2021

Sci Rep

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“…They proved that these materials protect electromagnetic waves and show significant vibration reduction and acoustic isolation. In one of the authors' works [11], a study of the fire resistance of aluminum and aluminum-ceramic foams is presented.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Different Length Aluminum Foam Filling on Mechanical Behavior of a Square Thin-Walled Column

et al. 2021

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The demand for lightweight, strong structural profiles is currently high in the transport industry, mechanical engineering, and construction. Therefore, it is important to evaluate their properties, especially mechanical properties. The main objective of this paper is to determine energy absorption coefficients and evaluate the crush resistance of thin-walled aluminum profiles using numerical simulation and empirical verification. This paper presents the compression results of testing of thin-walled aluminum profiles filled with a porous material (cast aluminum foam). The numerical analysis was conducted using the software Abaqus/CAE. Aluminum material data were obtained from a static tensile test performed on a Shimadzu machine. The experiment was performed on an Instron CEAST 9450HES dynamic hammer. Profiles with three shapes of crush initiators filled with aluminum foam measuring 40 mm–200 mm in 20 mm increments were numerically tested. A sample with a concave initiator filled with foams of 40 mm, 60 mm, 80 mm, and 120 mm in length was used to verify the numerical analyses. Energy absorption coefficients were determined from the analyses. The results of both analyses were tabulated to show the percentage differences. The study showed an increase in the Crush Load Efficiency (CLE) index by up to 33% for samples with the same crush initiator. In addition, it was noted that the use of porous fill does not increase the value of initiating Peak Crushing Force (PCF), which indicates the generation of much smaller overloads dangerous for vehicle passengers.

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“…Effective and nondestructive movement of the liquid metal in porous ceramics has influenced the chosen infiltration conditions (pressure, temperature, time, atmosphere, wettability) which determines the final composite porosity as well as the bonding character. The nature of that process is quite different from the fabrication of metal–ceramic composite foams, where the contact between liquid metal and the ceramic surface forms an intense metal mixture after which pore formation of metal-based suspension by inert gases occurs [ 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Carbon Foam Cell Sizes on the Microstructure and Properties of Pressure Infiltrated Magnesium Matrix Composites

2020

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Magnesium-based composites reinforced with open-celled carbon foams (Cof) of porosity approx. 97 vol % and three cell sizes (20, 45 and 100 ppi) were examined to characterize the influence of foam cell size on the microstructure and properties when pure magnesium and two cast alloys AZ31 and RZ5 were used as matrices. All composites were fabricated by pressure infiltration under the same conditions (temperature, pressure, time). For each matrix composition, two main factors due to the presence of the foam determined the composite microstructure—the efficiency of foam penetration and different conditions of metal crystallization. The lowest porosity was obtained when Cof45ppi was used and was independent of the applied matrix composition. The metallic component microhardness increased with a decrease in the carbon cell size as well as a decrease in the α-Mg grain size; both of those results should be taken into account during theoretical calculations. Compression and three-point bending strength measurements showed increases as the carbon cell size decreased, but reinforcing effectiveness relative to the matrix material depended on the metal matrix composition. At the fractured surface, different structural effects in the foam and matrix as well as at the interface were observed and depended on the foam geometry, metal composition and mechanical test type. In glassy carbon foam, those effects occurred as cracking across walls, fragmentation, and delamination, while in the matrix, shear bands and intergranular cracking were observed. On the delaminated foam surface, the microareas of a thin oxide layer were detected as well as dispersed phases characteristic for the applied matrix alloys. The accumulation of intermetallic phases was also observed on the metal matrix surface in microareas delaminated from the carbon foams. Mechanical property results indicated that among the tested, open-celled, carbon foams a 45 ppi porosity was the most useful for pressure infiltration and independent of magnesium-based matrix composition.

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A Study of Metal-Ceramic Composite Foams Combustibility

Cited by 9 publications

References 2 publications

Chemical compounds released by combustion of polymer composites flat belts

Chemical compounds released by combustion of polymer composites flat belts

The Influence of Different Length Aluminum Foam Filling on Mechanical Behavior of a Square Thin-Walled Column

Impact of Carbon Foam Cell Sizes on the Microstructure and Properties of Pressure Infiltrated Magnesium Matrix Composites

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