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Nanostrukturalne powłoki kompozytowe Ni-PTFE na stopach aluminium

Szeptycka B., Gajewska-Midziałek A., Mazurek A.

Inżynieria Powierzchni

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2013

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nr 4

26--31

PL

Elektrolityczne nanostrukturalne powłoki kompozytowe Ni-PTFE zastosowano do stopów glinu PA11, PA6 w celu podwyższenia odporności na zużycie. Do testowania właściwości zastosowano trzy metody przygotowania powierzchni aluminium. Strukturę zgładów poprzecznych wytworzonych powłok badano na mikroskopie Nicon Eclipse JV 150. pomiary przyczepności powłok do podłoża aluminiowego wykonano metodą scratch testu. Chropowatość podłoża aluminiowego i powłok kompozytowych mierzono profilografem TR 100prod. Elcometr Instruments Ltd. Mikrotwardość mierzono metodą Vickersa przy użyciu mikrotwardościomierza Vickersa, stosując obciążenie 0,05 kG. wytworzone powłoki kompozytowe poddano badaniom tribologicznym na maszynie Amslera. Kompozytowe powłoki niklowe Ni-PTFE wytworzone w tych badaniach odznaczały się 6-krotnie lepszą odpornością na zużycie w porównaniu ze stopem PA11 i 2-krotnie lepszą w porównaniu z PA6.

EN

The electroplated nanostructural nickel composite coatings Ni-PTFE were applied to aluminium PA11, PA6 to increase the wear resistance. The three pretreatment procedure was used for properties test of the aluminium PA11 and PA6. The cross-sectional structures of the coated samples were studied by Nicon Eclipse JV 150 microscope. The scratch test was used for the determination of adhesion The roughness of the aluminium alloy and nickel composite foils was evaluated using the TR 100 profilograph Elcometr Instruments Ltd. The microhardness of the deposited layers was measured using the Vickers’ method at the load of 0.05 kG. The tribological properties of the deposited coatings were tested on the Amsler machine. The nickel composite coatings Ni-PTFE produced during investigations were distinguished by the 6 times better wear resistance than those of the aluminium alloy PA11 and 22 times better in comparison with PA6.

2

Tailoring of anodic surface layer properties on titanium and its implant alloys for biomedical purposes

Krasicka-Cydzik E.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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Vol. 43, nr 1

424--431

EN

Purpose: Presentation of different anodizing methods used for formation of thin, thick, gel like covered and nanostructural titania and alloy component oxides. Evaluation of their properties for various biomedical applications in implantology and biosensing. Design/methodology/approach: Samples of titanium and its alloys were anodized in phosphoric acid solutions at different concentrations (0.5 ~ 4 M) with or without additions according to appropriate polarization regimes. Anodized samples were characterized by SED+EDS, electrochemical and impedance (EIS) tests and biocompability examination. Titanium and its alloys (Ti6Al4V and Ti6Al7Nb) samples were also used to form the nanostructural layer (nanotubes) by anodizing. The latter was used as a platform for glucose biosensing. Findings: Anodizing of titanium materials in phosphoric acid solutions allowed to obtain surface layers of various morphology and topography. They differ in porosity, thickness and chemical composition and according to their specific properties can be used in various biomedical applications. The development of gel-like layer and formation of nanotube layer was observed while anodizing in higher concentration of electrolyte or anodizing in the presence of fluorides. Both surface layers are much more bioactive than anodic barrier oxide layers on titanium. The primary tests to use nanostructured layer as platform for the third generation biosensors were promising. Practical implications: Use of medical implants covered with porous and nanostructural anodic layers tailored to particular biomedical purposes enables new practical applications in implantology and biosensing. Originality/value: Phosphate gel-like layer over surface oxide layer on titanium materials and nanostructural surface layer rich in both: phosphates and fluorides, are highly bioactive, which is the desirable property of implant materials.

3

Odporność balistyczna nanostrukturalnych i gradientowych warstw wierzchnich modułów ochronnych pancerza napawanych metodą GMA

Klimpel A., Luksa K., Burda M

Biuletyn Instytutu Spawalnictwa w Gliwicach

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2010

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R. 54, nr 4

45-49

PL

Celem badań było opracowanie warunków technologicznych zrobotyzowanego napawania GMA doświadczalnych modułów ochronnych pancerza. Na podstawie badań balistycznych wykazano wysoką odporność modułów ochronnych pancerza na oddziaływanie pocisku przeciwpancerno-zapalającego B-32 naboju karabinowego 7,62x54R mm Mosin.

EN

The purpose of the investigations was to develop technological conditions of robotized GMA surfacing of experimental protective modules of armours. On the grounds of ballistic tests it has been shown high resistance of armour protective modules against impact of B-32 armour-piercing incendiaries of 7,62 x 54 mm Mosin rifle cartridges.