ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Ion beam assisted deposition with a duoplasmatrona) (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 3058-3062 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: One of the recent applications of ion sources is their use for ion beam assisted deposition of thin films and coatings. This method combines a coating technique such as evaporation or sputtering with bombardment with ions in the keV energy range. The required ions with defined energy, flux, and impact angle are delivered from an ion source. An apparatus for ion beam assisted evaporation with a duoplasmatron ion source is described. The features of the duoplasmatron with respect to application for ion beam assisted deposition such as beam shape, uniformity and intensity, ion-to-neutral ratio, and focused and defocused mode are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142606
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Ion beam assisted deposition with a duoplasmatron (abstract)a) : Proceedings of the fourth International Conference on Ion Sources (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 2393-2393 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: One of the recent applications of ion sources is their use for ion beam assisted deposition of thin films and coatings. This method combines a coating technique such as evaporation or sputtering with bombardment with ions in the keV energy range. The required ions with defined energy, flux, and impact angle are delivered from an ion source. An apparatus for ion beam assisted evaporation with a duoplasmatron ion source is described. The features of the duoplasmatron with respect to application for ion beam assisted deposition such as beam shape, uniformity and intensity, ion-to-neutral ratio, and focused and defocused mode are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142938
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    ALLIGATOR−An apparatus for ion beam assisted deposition with a broad-beam ion source : Proceedings of the fourth International Conference on Ion Sources (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 2411-2413 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Ion beam assisted deposition is a versatile technique for preparing thin films and coatings for various applications. Up to now a prototype setup for research purposes has been used in our laboratory. Processing of industrial standard workpieces requires a high current ion source with broad beam and high uniformity for homogeneous bombardment. In this contribution a new apparatus for large area samples will be described. It is named ALLIGATOR (German acronym of facility for ion assisted evaporation on transverse movable or rotary targets). In order to have a wide energy range available two ion sources are used. One delivers a beam energy up to 1.3 keV. The other is suitable for energies from 5 keV up to 40 keV. The "high-energy'' ion source is a multicusp multiaperture source with 180-mA total current and a beam diameter of 280 mm at the target position.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142946
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Pharmacokinetics and pharmacodynamics of methyl proscillaridin in healthy man (1976)
    Springer
    European journal of clinical pharmacology 10 (1976), S. 101-108 
    Details
    ISSN: 1432-1041
    Keywords: Cardiac glycosides ; methyl proscillaridin ; plasma concentrations ; electrocardiogram ; bioavailability ; 86Rb-erythrocyte assay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The aim of this study was to obtain data about the pharmacological properties of a new glycoside derivative in man. Plasma concentrations and ECG parameters were measured after oral and intravenous administration of a single dose of 1.2 mg methyl proscillaridin in 16 healthy volunteers, using a strictly randomized, two-period change-over design. Glycoside concentrations were measured using a modified86Rb-erythrocyte-assay. QT-duration, corrected for frequency (QTc), was the principal variable measured in the ECG. By either route, there was a maximum plasma level after 1 hour, which had decreased to a minimum at 3 hours, followed by a second peak at 4 to 10 hours (orally〉iv). From 10 to 72 hours the concentrations decreased with a median t 1/2 of 23.3 hours (iv) and 33.0 hours (orally). Comparison of the ratio of plasma concentrations following oral and iv administration resulted in a bioavailability of 69 % using the 48 hour plasma levels, and 59 % using the areas under the concentration-time curves. The mean QTc was maximally shortened to 28 msec at 1 hour after iv and to 19 msec at 10 hours after the oral dose. A distinct similarity between time-concentration and time-QTc curves was seen after the initial distribution phase, both after oral and intravenous administration. The new derivative shows a rapid elimination. Its bioavailability is reasonably high.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00609467
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Arwin® in peripheral arterial circulatory disorders: Controlled multicentre trials (1976)
    Springer
    European journal of clinical pharmacology 9 (1976), S. 387-392 
    Details
    ISSN: 1432-1041
    Keywords: Defibrinogenisation ; peripheral arterial disease ; clinical trial design ; medical statistics ; sequential analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of Arwin® on peripheral arterial occlusive disease has been studied in two multicentre trials. In the first, in cases of severe peripheral arterial circulatory disorders of the lower extremities with permanent rest pain (stages III and III + IV according to Fontaine) Arwin® had a better intravenous therapeutic effect than anticoagulant treatment. A further trial was done to investigate whether subcutaneous administration of Arwin® would have an effect superior to classical conservative therapy with vasodilator drugs in this type of disease. The results were assessed by sequential analysis. Arwin® was again shown to be a much better treatment. Problems of medical documentation and statistics are discussed in relation to the value of sequential analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00606553
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Decay properties of neutron deficient Kr isotopes (1974)
    Springer
    The European physical journal 266 (1974), S. 65-67 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The decay properties of the neutron deficient isotopes73–77Kr and73–76Br have been studied at the ISOLDE facility at CERN. The total decay energiesQ, as determined fromβ + singles orβ + -γ coincidence measurements, are compared with mass formulae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668666
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Verschleißminderung an hartverchromten Kolbenringen durch Ionenimplantation (1987)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 18 (1987), S. 356-359 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19870181013
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Maßgeschneiderte Schicht-Interfacesysteme mittels ionenstrahlgestützter Beschichtung (1998)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 29 (1998), S. 518-524 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Custom-Tailored Coating-Interface Systems by Means of lon Beam Assisted DepositionA coated sample represents in its most simple form a threefold junction consisting of substrate interface and top layer. In many cases the top layer consists again of several sublayers or the interface contains a modified substrate surface and an interconnection between top layer and interface. An ideal coating technique is evaporation under simultaneous ion bombardment with an ion source it is possible because of several free parameters to come close to an ideal system.For the coating Al/Al2O3 on steel it is shown that the width of a composition gradient between the sublayers Al and Al2O3 can be optimized with respect to excellent corrosion resistance.The example CrxN coating on steel or corrosion and wear resistence demonstrate the ability to optimize the corrosion and wear resistence by modifying the microstructure via variation of the parameters ion energy, ion impact angle, ion to atom ratio and process temperature.Finally, TiN layers on steel were chosen to show that the ion beam parameters influence the porosity and the crystal structure of the coatings. This fact can be used to optimize the corrosion protection or wear reduction obtained by the coating. Especially the multilayer Ti/TiO2/TiN exhibits very interesting properties.
    Notes: Ein beschichtetes Bauteil stellt in seiner einfachsten Form einen Dreierverbund aus Substrat, Interface und Schicht dar, in vielen Fällen kann die Schicht aus mehreren Untersystemen bzw. das Interface aus der modifizierten Substatrandschicht und einem Zwischenbereich zur Schicht bestehen. Eine ideale Beschichtungsmethode sollte es daher erlauben, alle diese Schichten bzw. Schichtbereiche in kontrollierter und aufeinander abgestimmter Form zu erzeugen.Mittels des IBAd-Verfahrens, bei dem Aufdampfschichten während ihrer Abscheidung mit Ionen aus einer Ionenquelle beschossen werden, ist es möglich, infolge der zahlreichen frei wählbaren Parameter sich an das ideale System heranzutasten.Anhand des Verbunds Stahl/Al/Al2O3 wird erlätert, wie durch einen in der Ausdehnung optimierten Zusammensetzungsgradienten das Interface zwischen den Subschichten Al und Al2O3 bezüglich des Korrosionsschutzvermögens der Schicht verbessert werden kann.An CrxN-Schichten wird demonstriert, daß durch die Wahl der Parameter Ionenenergie, Ioneneinfallswinkel, Ionen/Atom-Verhältnis und Prozeßtemperatur über die Mikrostruktur von Schicht und Oberfläche das Verschleiß-und Korrosionsverhalten sowie die Härte angepaßt werden können.Am Beispiel TIN auf Stahl zeigt sich, daß je nach Ionenstrahlparameter die Porosität und damit das Korrosionsverhalten bzw. die Kristallinität und damit Härte und Verschleißverhalten optimiert werden können. Besonders Mehrlagenschichten Ti/TiO2/TiN zeigen interessante Eigenschaften.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19980290910
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Erzeugung verschleißmindernder Randschichten durch Ionenstrahlverfahren (1993)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 24 (1993), S. 109-119 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Formation of Wear Resistant Surface Layers by Ion Beam TechniquesIon beam techniques are state of the art procedures for the microelectronic industries. Recently they found more and more interest in materials science with respect to surface improvement of polymers, ceramics and metals.In this contribution at first the procedures and the equipment for ion implantation and ion beam assisted deposition are described.Then examples for basic investigations concerning the formation of hard, dense and non-porous surface coatings with potential for wear and corrosion inhibition are given. Especially the interdependency of ion beam parameters, microstructure of coating and interface and macroscopic properties of the coating/substrate system are discussed. Finally the surface treatment of piston seals, ball bearings and metal forming tools is mentioned illustrating the application potential of ion beam techniques.
    Notes: Die in der Mikroelektronik industriell angewandten Ionenstrahlverfahren finden mehr und mehr Eingang in die Materialforschung zur Oberflächenvergütung von Polymeren, Keramiken und Metallen. In diesem Beitrag werden zunächst die Ionenimplantation und die ionenstrahlgestützte Beschichtung (IBAD) methodisch und apparativ beschrieben. Sodann werden Beispiele für Grundlagenuntersuehungen zur Erzeugung harter, dichter, verschleiß- und korrosionsmindernder Randschichten erwähnt. Dabei wird besonders anf die Zusammenhänge zwischen Ionenstrahlparametern, Mikrostruktur der Schicht bzw. Grenzzone Schicht/Substrat und mechanischen und chemischen makroskopischen Systemeigenschaften eingegangen. Schließlich werden am Beispiel von Kolbenringen, Umformwerkzeugen und Wälzlagern Anwendungspotentiale der Verfahren erläutert.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19930240309
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Beanspruchungsverhalten von PVD-CrN Beschichtungen auf Leichtmetallwerkstoffen (1998)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 29 (1998), S. 9-15 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Behaviour of light metals with PVD-CrN coatings using different test methodsThe application of thin hard coatings on machining tools, e.g. drilling tools is state of the art. The increase of lifetime of coated Tools compared to uncoated tools is well known. [1]. In this context „separation of functions“ is an often used phrase, by meaning the separation of functions of the volume and the surface of materials. Going one step forward, from the point of view of tribology or corrosion this means, you have „only“ to protect the surface by using a „good“ coating without looking at the material underneath. In the past the influence of substrate materials or the optimization of the system (substrate-coating) was not the main aim of PVD development. Looking at substrate and coating as a system is especially necessary, if the differences of the properties of substrate and coating are large (e.g. hard coating - light metals).This paper shows different aspect of the tribological and electrochemical characterization of PVD coated light metals (CrN coating).
    Notes: Das Aufbringen dünner Hartstoffschichten ist bei tribologisch stark beanspruchten Werkzeugen, wie z. B. bei Dreh- und Umformwerkzeugen., Stand der Technik. Standzeiterhöhungen der beschichteten Werkzeuge im Vergleich zu unbeschichteten Referenzen sind vielfach bestätigt [1].In diesem Zusammenhang ist in vielen Fällen „Funktionstrennung“d. h. eine Trennung der Aufgaben von Werkstoffvolumen und Werkstoffoberfläche, ein zentrales Schlagwort. Dabei wird davon ausgegangen, daß tribologische und korrosive Beanspruchungen nur auf Oberflächen wirken und darum nur diese mit einer geeigneten Schicht zu schützen sind. Die Wahl der Substratwerkstoffe oder eine Optimierung des Schicht-Substrat-Verbundes stand oft nicht im Mittelpunkt der PVD - Schichtentwicklung. Betrachtungen zum Schicht-Substrat-Verbund sind jedoch unumgänglich, wenn die Eigenschaften von Schicht und Substrat stark von einander abweichen (z. B. Hartstoffe auf „weichen“ Leichtmetallen im Gegensatz zu Hartstoffen auf hochfesten Stahlsubstraten).Der Beitrag greift wesentliche Aspekte zur mechanisch-tribologischen und elektrochemischen Bewertung hartstoffbeschichteter Leichtmetalle am Beispiel PVD-CrN auf.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19980290105
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...