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  • 1
    Publication Date: 1996-08-01
    Print ISSN: 0257-8972
    Electronic ISSN: 1879-3347
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Elsevier
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 24 (1993), S. 125-130 
    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
    Notes: HSS-Zerspanwerkzeuge wurden mittels Magnetron-Sputtern mit TiN beschichtet unter Variation der Sputterparameter Druck, Leistung und Bias-Spannung. Untersucht wurde der Zusammenhang zwischen den grundlegenden Schichteigenschaften Eigenspannung, Härte und Morphologie und dem Verhalten gegen tribologische Beanspruchung mittels Modellverschleißversuchen und Zerspanversuchen von Mumetall. Sowohl die Schichtmorphologie als auch die Eigenspannungen wurden durch die Parameter-variation verändert, um optimale Beschichtungsbedingungen ableiten zu können. Die tribologischen Untersuchungen zeigen, daß die Beschichtungsparameter und die Schichtdicke den Verschleißwiderstand maßgeblich beeinflussen können. Dabei führen die Modellverschleiß- und Zerspanergebnisse zu qualitativ gleichen Aussagen, so daß eine aussagekräftige Simulation des Werkzeugverschleißes als Test für weitere modifizierte Schichten verwendet werden kann.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 24 (1996), S. 7-14 
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Tribological investigations of self-mated physical vapour deposition (PVD) coatings have shown in part very low friction in humid air and a strong dependence of the tribological behaviour on the relative humidity during the test. This behaviour can be interpreted in terms of the growth of surface layers, which act as solid lubricants and reduce friction and wear considerably. The use of surface sensitive analytical methods like SEM, XPS and AES for getting more information about this kind of surface layer, however, can have an adverse effect on these layers because of the necessary vacuum conditions. Therefore, atomic force microscopy (AFM) and lateral force microscopy (LFM) were used to study the topographical changes of two different PVD coatings under the influence of humidity. The aim of this work was to verify and to explain the well-examined macroscopic behaviour of two different engineering coatings on a microscopic scale. Because of the spatial resolution of the LFM technique it is possible to discern species with a different frictional behaviour on the same surface. This allows the beginning of (tribo)chemical reactions to be detected locally in contrast to conventional integrating tribological testing. Depending on the chemical nature of the PVD coatings and the stock holding period in certain environments, topographical changes can be detected by means of AFM/LFM. Under humid conditions small hillocks (droplets) begin to grow on TiN surfaces, the number and size of these hillocks depending on the duration of stock holding. On CrN surfaces this hillock formation does not occur even after extended storage for several weeks in humid air.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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