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  • 1
    Electronic Resource
    Electronic Resource
    Novel design for a compact fiber-optic scanning force microscope (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 2888-2891 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We present a new scanning force microscope (SFM) design with a compact fiber-optic interferometric detection system that provides very high resolution for surface force measurements. The mechanical conception of the instrument includes the implementation of piezoelectric actuators for the interferometer alignment. The result of this approach is a high performance SFM with both easy handling and high versatility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144477
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  • 2
    Electronic Resource
    Electronic Resource
    Experimental investigation on induction brazing of diamond with Ni-Cr hardfacing alloy under argon atmosphere (1991)
    Springer
    Journal of materials science 26 (1991), S. 5093-5100 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In recent years direct brazing of a monolayer of diamond crystals on a steel substrate with active filler metals has gained tremendous importance in the industry, with a view to developing tools which can out-perform the conventional galvanically bonded diamond tools. An existing proprietary process uses a specially prepared Ni-Cr filler metal to facilitate its application on a steel substrate. The brazing is done either in a vacuum or a dry hydrogen furnace. The present study has shown that a commercially available Ni-Cr hardfacing alloy, flame-sprayed on a steel substrate with an oxyacetylene gun, could be used for direct brazing of diamond particles. Induction brazing was carried out in an argon atmosphere only for short durations. During brazing under such conditions, the chromium present in the alloy segregated preferentially to the interface with diamond to form a chromium-rich reaction product promoting the wettability of the alloy. It has been further revealed that under a given set of brazing conditions, the wettability of the Ni-Cr hardfacing alloy towards diamond grits primarily depended on its layer thickness. Such dependence resulted in significant variation of topographical features of the tool and its wear mode in simulated grinding tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549897
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  • 3
    Electronic Resource
    Electronic Resource
    On brazing of cubic boron nitride abrasive crystals to steel substrate with alloys containing Cr or Ti (1993)
    Springer
    Journal of materials science 28 (1993), S. 5887-5893 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An investigation has been carried out to gain information about the capabilities of some filler alloys for direct brazing of CBN (cubic boron nitride) grits to a steel substrate. It has been found that a Ni-Cr alloy, known for effective diamond brazing, failed to show satisfactory wetting and bonding characteristics towards CBN under the same brazing conditions as that of diamond. The situation could not be improved either by increasing the wt% of Cr or the brazing temperature. Also, prolongation of the brazing time did not show any significant change. It was further revealed that a Ag-Cu-Ti alloy, which is well established for the brazing of diamond and ceramics, exhibited good wetting and bonding towards CBN at moderate temperature. Based on the thermodynamic properties of various materials, characteristic properties of elements of group IV B to VI B and the physical observations made during the investigation, it is suggested that the transition elements of group IV B, such as Ti or Zr, are preferred to transition elements of group VI B, such as Cr, as an activator to promote the wetting characteristics of the braze alloy towards CBN, which is far more chemically stable than diamond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365197
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  • 4
    Electronic Resource
    Electronic Resource
    Observation of controlled, electrochemically induced friction force modulations in the nano-Newton range (1995)
    Springer
    Tribology letters 1 (1995), S. 13-21 
    Details
    ISSN: 1573-2711
    Keywords: scanning force and friction microscopy (FFM) ; nanotribology ; electrochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The local chemical properties of the contacting asperities in a real tribosystem are of crucial importance for the resulting macroscopic tribo-behavior. Thus, the lateral forces acting on the tip of a standalone scanning force and friction microscope have been investigated as a function of controlled surface chemistry, realized by potentiostatic control of the sample. The results obtained show a clear dependence of nanoscale friction behavior upon changes in the electrochemical state of the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00157971
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  • 5
    Electronic Resource
    Electronic Resource
    The mechanical properties of carbon fibres coated with titanium carbide (1971)
    Springer
    Journal of materials science 6 (1971), S. 270-273 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550027
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  • 6
    Electronic Resource
    Electronic Resource
    Verhalten des Thioharnstoffs bei der Kupfer-Abscheidung aus sauren Kupfersulfat-Bädern (1964)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 36 (1964), S. 679-681 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Thioharnstoff-Zusätze zu sauren Verkupferungsbädern verbessern die mechanischen Eigenschaften der abgeschiedenen Schichten. Der Thioharnstoff kann in Form seines Cu(I)-Komplexes spektrophotometrisch im UV-Bereich bestimmt werden. Dieser Komplex verschwindet bei der Elektrolyse schneller aus dem Anoden- als aus dem Kathodenraum. Elektronenmikroskopisch ließ sich zeigen, daß bei zwei nacheinander mit dem gleichen Bad erhaltenen Schichten die mittlere Korngröße zunimmt, während Verteilungsdichte und mittlerer Durchmesser der Einschlüsse sich kaum verändern. Die Zunahme der Korngröße im Verlauf der Elektrolyse wurde auch innerhalb einer einzigen Schicht nachgewiesen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330360615
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  • 7
    Electronic Resource
    Electronic Resource
    Tribologische Prüfungen an Oberflächenschichten aus Titancarbid, Titannitrid, Chromcarbid und Eisenborid (1980)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 11 (1980), S. 182-190 
    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: Tribological Tests on Surface Layers of Titanium Carbide, Titanium Nitride, Chromium Carbide and Iron BorideResults of friction and wear tests are presented which were carried out under conditions of solid friction and mixed lubrication. In the test series the best tribological behaviour is found if both sliding partners are coated with a surface layer of titanium carbide formed by chemical vapour deposition (CVD).
    Notes: Es wird über die Ergebnisse von Reibungs- und Verschleißprüfungen berichtet, die bei Festkörper- und Mischreibung gewonnen wurden. Von den untersuchten Gleitpaarungen schneiden insgesamt gesehen diejenigen am besten ab, bei denen beide Partner eine Oberflächenschicht aus Titancarbid besitzen, die durch chemische Abscheidung aus der Gasphase (CVD) erzeugt wurde.
    Additional Material: 20 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19800110508
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  • 8
    Electronic Resource
    Electronic Resource
    Characterization of surface coatings by the scratch adhesion test and by indentation measurements (1993)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 346 (1993), S. 45-52 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Functional coating and surface modified layers can be characterized by engineering related criteria such as the ultramicrohardness test and the scratch adhesion test. The ultramicrohardness test is based on penetration depth measurements during a loading and unloading cycle. The depth sensing indentation provides a means of evaluating the elastic and plastic deformations of the tested material, from which, by calculation, the microhardness, HV, and the elasticity modulus, E, can be derived as illustrated on a number of examples of hard and soft materials and coating composites. The scratch test (REVETESTR) and microscratch test (MSTR) has been applied to determine the adhesive and/or cohesive strength of coatings deposited on softer or tougher substrates. A Rockwell C diamond cone is used to scratch the surface of the coated or surface-modified specimen at a constant speed and under a continuously increasing load. The smallest load at which the coating is damaged, called the Critical Load, Lc, is determined by optical, electron optical, acoustic emission detection and/or by frictional force measurement, i.e. by the sudden increase of the driving force. This is illustrated on hard, brittle, and on soft coatings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00321380
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Kenntnis des elekrochemischen Verhaltens aufgedampfter Silberschichten. 2. Mitteilung (1967)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 50 (1967), S. 1819-1831 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Der erhöhte Gehalt an freier Enthalpie dünner im Vakuum aufgedampfter Schichten gegenüber demjenigen des Massivkörpers desselben Stoffes kann für Metalle elektrochemisch auf Grund der Negativierung des reversiblen Elektrodenpotentials und der Grösse seines Temperaturkoeffizienten erfasst werden. Am Beispiel des Silbers wird gezeigt, dass diese Abweichung allein verursacht wird durch eine Verminderung der Sublimationsenergie. Der Effekt dieser Verminderung der Sublimationsenergie auf die Bindungsfestigkeit von Atomen auf Oberflächen wird anhand der KOSSEL-STRANSKI'schen Theorie diskutiert. Es wird auch gezeigt, dass bei Kenntnis des Betrages der Potentialnegativierung und desjenigen des Temperaturkoeffizienten in gewissen Fällen die Korngrösse dünner Schichten abgeschätzt werden kann.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19670500715
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Kenntnis des elektrochemischen Verhaltens aufgedampfter Silberschichten (1957)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 40 (1957), S. 1947-1954 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dünne, im Vakuum auf Spiegelglas und Plexiglas aufgedampfte Silberschichten werden auf ihre Potentialeinstellungen hin untersucht. Für die dünnsten untersuchten Schichten tritt gegenüber dem Massivmetall eine Negativierung des Potentials um 20-30 mV auf. Die Erscheinung wird auf eine Erhöhung der freien Energie durch kleine Primärteilchengrösse, Fehlbauerscheinungen, usw. zurückgeführt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19570400646
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