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Nanocomposite hard material coatings - improved properties by nano-structuring

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Coatings whose thickness (as part of a multilayer and/or composite system) or whose grain size, lie in the single-figure nm range can exhibit superior hardness, oxidation resistance and lower coefficient of friction. Itis the nanostructuring that brings improvements over analogous microcrystalline materials. Sketch shows idealised coating types, and lists actual examples (titanium, aluminium or zirconium nitrides or carbonitrides). Use of unbalanced magnetron sputtering plant is shown. Comments on hardness, temperature resistance with graphs showing how hardness peaks as function silicon content in a titanium nitride - Si nitride composite, or with Ti conc'n in Ti carbide/carbon hydrogen cmpd. 20 refs (in German)

Nanocomposite Layers of Ceramic Oxides and Metals Prepared by Reactive Gas-Flow Sputtering.

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Nanocomposite materials in a layer of a sliding bearing.

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Coating on predetermined surfaces of machine parts that are exposed to frictional contact. Said coating is composed of a basic material and at least one nanomaterial which is selected in accordance with the desired wear characteristics, sliding properties, and/or adhesive properties of the coating.

Nanocomposite of chitosan and silver oxide and its antibacterial property.

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An aqueous emulsion of chitosan nanoparticles encapsulating silver oxide was prepared from silver nitrate and chitosan. The nanoparticles were positively charged with an average diameter of 300 nm. The dried particle has a spherical shape with a 100 nm diameter. The emulsion was applied on to cotton and delivers a durable antibacterial activity against Staphylococcus aureus and Escherichia coli, after 20 washings. The coefficient of friction of the treated fabric is similar to that of the untreated cotton fabric.

Nanocomposite polymers

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Nano-fibre reinforced plastics, incl. silicate fibres, incl. self-healing paints which repair themselves after scratching.

Nanocomposite Science & Technology

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ISBN 978-3-527-31248-1 Incl. nanocomposite polymers, design of nanocomposites & their properties

Nanocomposite Ti-Si-N, Zr-Si-N, Ti-Al-Si-N, Ti-Al-V-Si-N Thin Film Coatings Deposited by Vacuum Arc Deposition.

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Nanocomposite TiSiBC hard coatings deposited by magnetron sputtering: Oxidation and mechanical behaviour with temperature and duration of oxidation.

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Nanocomposites and nanostructures based on plasma polymers.

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Nanocomposites based on silicate layers

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Suitable silicate sources such as bentonite are rendered organophilic by means of ion exchange and integrated with plastics on the micro-scale level to form nanocomposites. These have mechanical properties superior to that of matrix and electrical & optical properties which also differ. As with macro-scale composites, surface properties can be modified to provide flame resistance or liquid & gas resistance (impervious or non-porous).

Nanocomposites of carbon nanotubes embedded in a (Ti,Al)N coated film.

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Nanocrystal-size control of electrodeposited nanocrystalline semiconductor films by surface capping

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JES Crystal size of nanocrystalline cadmium sulphide and cadmium selenide films, electrodeposited from dimethyl sulfoxide solutions containing Cd salt and elemental S or Se depends on nature of anion of Cd salt. Relatively strongly adsorbing anions, such as chloride, result in a smaller nanocrystal size than relatively nonadsorbing anions such as perchlorate. This difference in nanocrystal size is explained by blocking (or capping) of the growing crystals by the adsorbed ions. Very strongly adsorbing species, such as alkyl phosphines, result in even smaller crystal size (3.5 nm aver. diameter).

Nanocrystalline antimony doped tin oxide (ATO) thin films: A thermal restructuring study.

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Nanocrystalline cadmium telluride films deposited by high-pressure sputtering: carrier transport at low temperature

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Nanocrystalline calcium phosphate ceramics in biomedical engineering.

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