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Ceramika Paradyż zainwestuje 125 mln złotych w innowacyjną na skalę światową technologię

Szkło i Ceramika

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2020

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R. 71, nr 4

22

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Analiza wad jednopolimerowych kompozytów poliestrowych

Bryll K., Piesowicz E., Gawdzińska K., Irska I., Kwiecińska B.

Inżynieria Materiałowa

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2015

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Vol. 36, nr 6

557--560

PL

Globalny rynek kompozytów polimerowych dynamicznie rośnie i będzie również wzrastać w przyszłości — nie tylko ze względu na rosnący popyt ze strony branż będących ich głównymi odbiorcami, lecz również ze względu na nowe zastosowania. Wymusza to ciągły rozwój tych materiałów. Interesującą innowacją jest propozycja zastosowania jako wzmocnienia włókien termoplastycznych wykonanych z tego samego materiału co osnowa, w wyniku czego uzyskuje się tzw. kompozyt jednopolimerowy (single-polymer composites). W literaturze można spotkać przede wszystkim badania nad tym typem materiałów opisane na przykładach jednopolimerowych kompozytów polietylenowych lub polipropylenowych. Obserwuje się jednak coraz częstsze zastosowanie kompozytów jednopolimerowych dla innych tworzyw, tj. PMMA lub poliestrów. W pracy opisano wytwarzanie oraz wady powstające w trakcie określania technologicznych uwarunkowań powstawania jednopolimerowych kompozytów poliestrowych – PET/PETG.

EN

Global market of polymer composites grows dynamically and will maintain its growth in the future — not only because of increasing demand by the branches which are the main recipients of these composites, but also because of new applications invented for them. Such a large requirement and wide application enforces perpetual development of these materials. An interesting innovation is a proposal of using the reinforcement in form of thermoplastic fibers, made out of the same material as the matrix. As a result, a so-called single-polymer composite is obtained. In literature, studies of these type of materials concern mostly examples of polyethylene or polypropylene composites. However, the idea of single-polymer composites begins to be implemented also for other polymer materials, such as PMMA or polyesters. This paper presents manufacturing and certain defects, forming during determination of the processing conditions for creation of single-polymer polyester composites PET/PETG.

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Optimization of squeeze parameters and modification of AlSi7Mg alloy

Zyska A., Konopka Z., Łągiewka M., Nadolski M.

Archives of Foundry Engineering

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2013

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Vol. 13, iss. 2

113--116

EN

The paper present the examination results concerning mechanical properties of castings made of AlSi7MG alloy in correlation both with the most significant squeeze casting parameters and with the modification treatment. Experiments were planned and held according to the 23 factorial design. The regression equations describing the influence of the squeeze pressure, the mould temperature, and the quantity of strontium modifier on the strength and elongation of the examined alloy were obtained. It was found that the main factor controlling the strength increase is the squeeze pressure, while the plasticity (A5) of the alloy is affected most advantageously by modification. The application of modification treatment in squeeze casting technology enables for production of the slab-type castings made of AlSi7Mg alloy exhibiting strength at the level of 230 MPa and elongation exceeding 14%.

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The influence of modification and squeeze casting on properties of AlSi11 alloy castings

Zyska A., Konopka Z., Łągiewka M., Nadolski M.

Archives of Foundry Engineering

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2011

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Vol. 11, iss. 2

153-156

EN

The results of structural examinations and tests of mechanical properties of AlSi11 alloy, either gravity or squeeze cast, have been presented. The investigations have been carried out for both the non-modified silumin and the alloy modified with AlSr10 strontium master alloy. The measurements have been carried out for the cast plates of dimensions 200x100x25 mm. It has been found out that the modification combined with squeeze casting provides an advantageous set of strength and plastic properties [...]. The metallographic examination has revealed a significant refinement of both the primary \alfa-phase dendrites and the silicon eutectics, however being dependent on the method of modification and casting. It has been found that the refinement of the primary crystals results from the influence of external pressure exerted on the solidifying casting, while the refinement observed for silicon eutectics is an effect of combined influence of modification and squeeze casting.

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Właściwości mechaniczne prasowanego stopu AlMg10

Zyska A., Konopka Z., Łągiewka M., Nadolski M.

Hutnik, Wiadomości Hutnicze

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2009

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Vol. 76, nr 5

355-357

PL

Przedstawiono wyniki badań właściwości mechanicznych odlewów wytwarzanych metodą prasowania bezpośredniego. Przeanalizowano rozkłady Rm i A5 w zewnętrznych i wewnętrznych częściach próbnego odlewu płyty w zależności od temperatury formy i ciśnienia prasowania. Prasowanie przeprowadzono przy temperaturach formy 150 °C i 250 °C, zmieniając ciśnienie prasowania od atmosferycznego do 90 MPa. Przedstawiono wyniki badań metalograficznych; oceniono zmiany strukturalne odlewów krzepnących pod ciśnieniem w stosunku do odlewów kokilowych. Wyznaczono optymalne parametry wytwarzania wysokowytrzymałych odlewów ze stopu AlMg10.

EN

Mechanical properties of castings produced by the direct squeeze casting method have been examined and the results have been presented in the work. The Rm and A5 distributions have been analysed for external and internal parts of the slab test casting for various die temperature and pressure of squeezing values. Squeezing has been performed at the die temperature equal to 150 °C or 250 °C changing the pressure of squeezing from the atmospheric one to the value of 90 MPa. Results of metallographic examination have been presented and the structural changes in castings solidifying under pressure have been assessed in comparison to die castings. Optimum parameters of producing the high-strength castings made of AlMg10 alloy have been determined.

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The influence of squeeze casting parameters on the mechanical properties of AlZn5Mg alloy

Zyska A., Konopka Z., Łągiewka M., Nadolski M.

Archives of Foundry Engineering

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2008

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Vol. 8, iss. 1 spec.

347--350

EN

Mechanical properties of castings produccd by the direct squeeze casting method have been examined and the results have been presented in the work. The Rm and A5 distributions have been analysed for external and intemal parts of the slab test casting for various die temperature and pressure of squeezing values. Squeezing has been performed at the die temperature equal to 150°C or 250°C changing the pressure of squeezing from the atmospheric one to the value of 90 MPa. Results of metallographic examination have been presented and the structural changes in castings solidifying under pressure have been assessed in comparison to die castings. Optimum parameters of producing the high-strength castings made of AlZn5Mg alloy have been determined.