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Ocena właściwości przeciwpożarowych pian aluminiowych i aluminiowo-ceramicznych

Tuchowski Wojciech, Rogala Michał, Kurtz-Orecka Karolina, Gawdzińska Katarzyna, Matuszak Zbigniew

Materiały Budowlane

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2023

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nr 1

27--31

PL

W pracy przedstawiono zastosowanie piany aluminiowej oraz piany aluminiowo-ceramicznej domieszkowanej cząsteczkami węglika krzemu w budownictwie, np. instalacjach fotowoltaicznych. Przeprowadzone badania reakcji na ogień wykazały, że struktury porowate mają wyższą temperaturę topnienia niż materiał stały. Ponadto ścianki piany pokryte są cienką warstwą Al2O3, co podwyższa wartość temperatury topnienia struktury. Obie badane piany, ze względu na swoją niepalność, mogą być stosowane w budownictwie lub w przemyśle morskim, po przeprowadzeniu badań uzupełniających określających ich klasę palności. Przeprowadzane badania są badaniami wstępnymi związanymi z doborem materiałów porowatych przeznaczonych na izolacje.

EN

The paper presents the application of aluminium foam and aluminium-ceramic foam, doped with silicon carbide particles as a part of photovoltaic installations. The tests of reaction to fire showed, that the porous structures have a higher melting point than the solid material. Moreover, the foam walls are covered with a thin layer of Al2O3, which raises the melting point of the structure. Both investigated foams, due to their non-flammability, can be used in civil engineering or in the marine industry, after conducting supplementary tests determining their flammability class. The tests carried out are preliminary tests related to the selection of porous materials dedicated to insulation.

2

Study of Thermal Properties of Cast Metal-Ceramic Composite Foams

Gawdzińska K., Chybowski L., Przetakiewicz W.

Archives of Foundry Engineering

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2017

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Vol. 17, iss. 4

47--50

EN

Owing to its properties, metallic foams can be used as insulation material. Thermal properties of cast metal-ceramic composite foams have applications in transport vehicles and can act as fire resistant and acoustic insulators of bulkheads. This paper presents basic thermal properties of cast and foamed aluminum, the values of thermal conductivity coefficient of selected gases used in foaming composites and thermal capabilities of composite foams (AlSi11/SiC). A certificate of non-combustibility test of cast aluminum-ceramic foam for marine applications was included inside the paper. The composite foam was prepared by the gas injection method, consisting in direct injection of gas into liquid metal. Foams with closed and open cells were examined. The foams were foaming with foaming gas consisting of nitrogen or air. This work is one of elements of researches connected with description of properties of composite foams. In author's other works acoustic properties of these materials will be presented.

3

Description of selected structural elements of composite foams using statistical methods

Gawdzińska K., Grabian J., Pędzich Z., Przetakiewicz W.

Archives of Foundry Engineering

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2011

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Vol. 11, iss. 2 spec.

53--58

EN

This article makes use of images from a computer tomograph for the description of selected structure elements of metal and composite foams by means of statistical methods. Besides, compression stress of the tested materials has been determined.

4

Assessment of possible control of selected operational properties of metal-ceramic foams

Grabian J., Przetakiewicz W.

Archives of Foundry Engineering

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2010

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Vol. 10, iss. 1 spec.

419--422

EN

Effective use of metal foams, an increasingly popular group of machine structural materials, often requires that their properties be adjusted to customer needs. The growing popularity of foams is due to their specific properties, i.e. capability of absorbing the impact and explosion energy, increasing the stiffness of structural components such as panels of closed profiles, ability to damp vibrations, relatively good thermal insulation, dispersion of electromagnetic waves, resistance to high temperature and others. One of the operational properties of metal foams that is essential for their use in various structures is the resistance to single-axial static compression. Initial studies aimed at the determination of how metal foam behaves when statically compressed. Foam samples were made by blowing gas into liquid metal. The composition of metal foam (AlSi11) was differentiated by introducing ceramic particles SiC. By changing technological parameters of the foaming process we could affect the size of gaseous bubbles and their homogeneity. By comparing the structure of foams and their properties we found significant differences in the curve x = f(P) of foam sample affected by the force (P). It has been proved that one operational property, namely the resistance to compression, can be indirectly controlled, that is its determined specific structure can be obtained by maintaining specific technological parameters.