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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 1 (1970), S. 89-95 
    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: Arc and plasma spraying of special materials with high oxygen affinityWithin the framework of the research work dealt with in this paper, metallic coatings of titanium, tungsten, molybdenum, tantalum and zirconium were produced on steel base material by the spray-deposition process.  -  The affinity of the molten special metals to reactive gases (particularly oxygen) is high, therefore. The spraying operation was carried out in an inert gas chamber. The equipment used to produce these metallic coatings comprised a two-wire arc-gun designed by the authors and a commercially available plasma-gun adapted to suit the test conditions.  -  In the case of all the special metals sprayed in this way the principal mechanism effecting adhesion must be seen to reside in a metallurgical interaction between base und sprayed metal.  -  Observations are discussed concerning structural peculiarities and embrittlement effects depending on the kind of shielding gas employed.
    Notes: Im Rahmen neuerer Forschungsarbeiten wurden metallische Überzüge aus Titan, Wolfram, Molybdän, Tantal, Niob und Zirkon auf stählernem Grundwerkstoff spritztechnisch erzeugt.  -  Die Beschichtungen wurden mit einer 2-Draht-Lichtbogenpistole eigener Bauart und einer den Verhältnissen angepaßten handelsüblichen Plasmapistole durchgeführt. Bedingt durch die hohe Affinität der schmelzflüssigen Sondermetalle zu reaktiven Gasen, vor allem Sauerstoff, wurde das Beschichten in einer Inertgaskammer vorgenommen.  -  Mechanisch-technologische Untersuchungen der Spritzschichten in bezug auf ihre Haftfestigkeit und Mikrohärte sowie metallographische Untersuchungen konnten den Nachweis erbringen, daß es möglich ist, festhaftende dichte und oxidfreie Überzüge aus Sondermetallen durch thermisches Spritzen herzustellen.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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