Many components in helicopter dynamics systems depend on hard, wear resistant coatings for reliable performance. Component replacement times are currently limited by performance of these coatings in many cases. Thermal spray coatings have been evaluated for these applications. The effect of coatings on fatigue strength is quantified by a strain limit concept to reduce test requirements during development phase. Full scale bench testing and coupon wear testing werde conducted to reveal large improvement in sliding and fretting wear resistance. A fine porosity network in thermal spray coatings and high fatigue strength are shown to be the main contributors to improved wear performance. Thermal spray coatings also exhibited enhanced corrosion resistance in salt fog and crevice corrosion conditions. These data permitted implementation on several critical helicopter components. Thermal spray coatings can satisfy the requirements demanded in the helicopter environment.
The development and implementation of thermal spray coatings for helicopter components
Entwicklung und Einsatz von thermogespritzten Schichten für Hubschrauber-Bauteile
Journal of the American Helicopter Society ; 42 , 3 ; 229-234
1997
6 Seiten, 12 Bilder, 3 Quellen
Article (Journal)
English
The development and implementation of thermal spray coatings for helicopter components
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