Wyniki wyszukiwania - BazTech

1

Szkło fasadowe z powłokami wielofunkcyjnymi

Marczewska A., Balon-Wróbel A.

Materiały Budowlane

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2017

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nr 9

104--107

PL

W artykule omówiono charakterystykę i rolę powłok stosowanych w oszkleniach budowlanych. Dokonano identyfikacji wybranych wielofunkcyjnych energooszczędnych i/lub samoczyszczących powłok wykorzystywanych w konstrukcjach fasad wielkopowierzchniowych przez przedstawienie wyników badań ich składu chemicznego i grubości. Wyznaczono parametry świetlne i energetyczne wybranych szkieł. Porównano otrzymane charakterystyki spektrofotometryczne. Dokonano analizy wpływu właściwości świetlnych i energetycznych badanych szkieł powłokowych na efekty praktyczne związane z użytkowaniem oszkleń z podkreśleniem ich wielofunkcyjności.

EN

The article discusses the characteristics and role of the coatings used in construction glazing. Identified selected multifunctional energy saving and self-cleaning coatings used in large surface facade designs by presenting results of their chemical composition and thickness. The light and energy parameters of selected glasses were determined. The obtained spectrophotometric characteristics were compared. An analysis of the influence of the light and energy properties of the investigated coatings on the practical effects of using glazing with emphasis on their multifunctionality.

2

Characteristic features of fine-grained coatings deposited on magnesium alloys

Tański T., Dobrzański L. A., Rusz S., Matysiak W., Kraus M.

Archives of Materials Science and Engineering

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2014

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Vol. 66, nr 1

13--20

EN

Purpose: This work presents the research results on the structure of gradient/monolithic coatings (Ti/Ti(C,N)/CrN, Cr/CrN/TiN) deposited onto the magnesium alloy substrate by cathodic arc evaporation method. Design/methodology/approach: The investigations were performed using scanning and transmission electron microscopy (with different image techniques) for the microstructure determination. The morphology was studied as well as the lattice parameters for the layer matrix and substrate phase identification using diffraction methods. Findings: A thin metallic layer (Ti and Cr) was deposited prior to deposition of gradient coatings to improve adhesion. It was found out that the microstructure of the PVD coatings deposited by the cathodic arc evaporation method is composed of fine crystallites and that their average size is in the range of 15-200 nm, depending on the coating type. SEM micrographs showed that the deposited coatings are characterized by compact structure without delamination or defects and they closely adhere to each other. Investigations confirm also that the Ti(C,N)/CrN and CrN/TiN coatings reveal a clearly visible transition zone between the gradient Ti(C,N) and CrN layers and the wear resistant CrN and TiN layers, obtained as a result of the separately applied metal vapour sources. Practical implications: Achieved coatings with good adhesion and without the disadvantage of delamination was made possible by cathodic arc evaporation method. Obtained properties of gradient/monolithic coatings (Ti/Ti(C,N)/CrN, Cr/CrN/TiN) deposited onto the magnesium alloy substrate and the study of them can contribute to development in a given group of materials used for different surface engineering processes. Originality/value: The original value of the work is that it applied the PVD method for a common material like magnesium alloy.

3

Nanostructural C-Pd coatings obtained in 2-steps PVD/CVD technological process

Kozłowski M., Czerwosz E., Dłużewski P., Kowalska E., Radomska J., Wronka H.

Journal of Achievements in Materials and Manufacturing Engineering

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2009

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Vol. 37, nr 2

304-308

EN

Purpose: The paper presents scanning electron microscopy (SEM) and transmission electron microscopy (TEM) investigation results of nanoporous coatings based on palladium and carbon, obtained in two steps process – first step – physical vacuum deposition (PVD) and second step chemical vacuum deposition (CVD). Design/methodology/approach: Studies of topographical and structural properties of coatings obtained in the first and the second step of technological process. Findings: Pd content included in the volume of a coating obtained in PVD process affects on a distribution and sizes of Pd nanocrystals. The diameter of Pd nanocrystals obtained for coatings with lower Pd content is lower than for coating with higher Pd content. Modification of these coatings in CVD process at temperature of 650°C leads to obtain a different form of the final coating: for coating with lower content of Pd, the CVD process causes formation of nanoporous C-Pd coating; for coating with higher Pd content, formation of bigger Pd crystals is found. Temperature higher than 650°C leads to coatings growth with non-porous structure. Practical implications: Obtained coatings can be used as active layer in hydrogen and hydrogen compounds sensors or in hydrogen storage applications. Originality/value: Two steps method of presented coatings obtaining was originally elaborated by our group in Tele- & Radio-Research Institute.

4

Experimental investigations of the Cu-Mo and Cu-Ti electro-spark coatings modified by laser beam

Radek N.

Advances in Manufacturing Science and Technology

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2008

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Vol. 32, nr 2

53-68

EN

The paper is concerned with determining the influence of the laser treatment process on the properties of electro-spark deposited coatings. The properties were assessed by analyzing the coating microstructure, microhardness, residual stresses and corrosion resistance. The tests were conducted for Mo, Ti and Cu coatings (the anode) which were electro-spark deposited over the C45 steel substrate (the cathode) and melted with a laser beam. The coatings were deposited by means of an ELFA-541. The laser processing was performed with an Nd:YAG, BLS 720 system. The coatings, whether laser-treated or not, exhibit very good performance properties, and this makes them suitable for use in sliding friction pairs.

PL

W pracy prowadzono badania wpływu obróbki laserowej na właściwości powłok nanoszonych elektroiskrowo. Ocenę właściwości powłok po przetapianiu laserowym wykonano na podstawie wyników badań mikrostruktury, pomiarów twardości i naprężeń własnych oraz odporności korozyjnej. Stosowano Mo, Ti oraz Cu jako materiał powłok (anody) nakładany elektroiskrowo na próbki ze stali C45 (katody) i przetapiany wiązką laserową. Do nanoszenia powłok elektroiskrowych użyto urządzenia ELFA-541. Obróbkę laserową powłok elektroiskrowych wykonano laserem Nd:YAG, model BLS 720. Ze względu na właściwości powłoki tego typu zarówno przed, jak i po obróbce laserowej mogą być stosowane w ślizgowych węzłach tarcia.