Wyniki wyszukiwania - BazTech

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TEM microstructure investigations of aluminium alloys used as coating substrate

Tański T., Labisz K., Dobrzański L.A., Wiśniowski M., Matysiak W.

Archives of Materials Science and Engineering

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2013

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Vol. 59, nr 2

82--92

EN

Purpose: The aim of this paper was investigated structure and properties of gradient coatings produced in PVD process on AlSi9Cu aluminium alloys. Design/methodology/approach: The following results concern the structures of the substrates and coatings with the application of electron transmission and scanning microscopy; phase composition of the coatings using X-ray diffraction and grazing incident X-ray diffraction technique (GIXRD); microhardness and wear resistance. Findings: The deposited coatings are characterized by a single, double, or multi-layer structure according to the applied layers system, and the individual layers are coated even and tightly adhere to the substrate as well to each other. The analysis of coatings obtained on the surface of cast aluminium alloys by the PVD processes show a clear - over 100% - increase of the microhardness, compared to the base material microhardness. Practical implications: Achieving of new operational and functional characteristics and properties of commonly used materials, including the Al-Si-Cu alloys is often obtained by heat treatment, ie, precipitation hardening and/or surface treatment due to application or manufacturing of machined surface layer coatings of materials in a given group of materials used for different surface engineering processes. Originality/value: The paper presents the research involving the PVD coatings obtained on an unconventional substrate such as aluminium alloys. Contemporary materials should possess high mechanical properties, physical and chemical, as well as technological ones, to ensure long and reliable use. The above mentioned requirements and expectations regarding the contemporary materials are met by the non-ferrous metals alloys used nowadays, including the aluminium alloys.

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Predicting properties of PVD and CVD coatings based on fractal quantities describing their surface

Kwaśny W.

Journal of Achievements in Materials and Manufacturing Engineering

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2009

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Vol. 37, nr 2

125-192

EN

Purpose: The goal of the presented study was to develop a methodology giving a possibility to predict functional properties of coatings obtained in the PVD and CVD processes on tool materials, based on fractal- and multi-fractal quantities describing their surface. Design/methodology/approach: Effect of process type and deposition conditions on structure and shape of surface, as well as mechanical and service properties of the obtained coatings were determined. Methodology and detailed description of coatings topography obtained in PVD and CVD process on tool materials, including use of the fractal- and multi-fractal geometry based on images obtained on the atomic forces microscope were worked out. Relationships between fractal- and multi-fractal quantities and their mechanical and service properties were determined. Findings: The investigation results confirmed the feasibility to predict hardness and erosion resistance of coatings obtained in the magnetron PVD process, as well as the service properties defined in the cutting ability test for coatings obtained in the arc PVD process and in the high-temperature CVD process, based on the surface fractal dimension Ds value for their surface topography. Practical implications: Determining significant quantitative correlations between fractal quantities defining coatings’ surfaces, as well as their service and/or mechanical properties provides the opportunity to predict their end-user properties. Originality/value: Fractal analysis was applied for characterization of PVD and CVD coatings surfaces.

3

Struktura i własności tlenkowej ceramiki narzędziowej Al2O3+TiC z powłokami PVD i CVD do skrawania na sucho z dużymi prędkościami

Dobrzański L.A., Mikuła J., Soković M.

Mechanik

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2005

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R. 78, nr 4

309-314

PL

Przedstawiono wyniki badań struktury i własności tlenkowej ceramiki narzędziowej typu Al2O3+TiC niepokrytej i pokrytej jedno-, wielowarstwowymi, wieloskładnikowymi oraz gradientowymi powłokami przeciwzużyciowymi PVD i CVD. Zaprezentowano wyniki badań morfologii powierchni, struktury, składu chemicznego, składu fazowego, a także wyniki badań własności mechanicznych i użytkowych materiału pokrytego oraz materiały bez powłok.

EN

Presented are results of the tests carried out on structure and properties of the Al2O3+TiC oxide ceramic tools either non coated or coated with multi-layer, multi-component and gradient type hard wearing coatings types TiN, TiAlN, TiN+TiAlSiN+TiN, TiN+ multi TiAlSiN+TiN and TiN+TiAlSiN+AlSiTiN applied in CAE PVD cathodic arc vaporation process and also those coated with two layer TiCN+TiN and TiN+Al2O3 coatings applied in CVD process of chemical deposition of gas phase.

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Powłoki PVD i CVD odporne na ścieranie naniesione na ceramikę narzędziową Si3N4

Pakuła D., Dobrzański L.A., Kwaśny W.

Mechanik

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2005

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R. 78, nr 4

302-308

PL

Przedstawiono szczegółowe wyniki badań struktury i własności wielowarstwowych i wieloskładnikowych powłok PVD i CVD wytworzonych na podłożu z narzędziowej ceramiki azotkowej Si3N4. Omówiono wyniki badań struktury w transmisyjnym i skaningowym mikroskopie elektronowym oraz własności mechanicznych i tribologicznych badanych powłok.

EN

Presented are detailed rresults of research tests carried out on structure and properties of the multilayer and multi component PVD or CVD applied coatings on SiN nitride ceramic tool material surface.