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Analysis of the running-in of thermal spray coatings by time-dependent stribeck maps

Linsler, Dominic; Kümmel, Daniel; Nold, Eberhard; Dienwiebel, Martin

Abstract:
As thermal spray coated cylinder surfaces eliminate the need for cast iron sleeves or hypereutectic AlSi alloys, these coatings are becoming the main cylinder liner technology. Moreover, it has been found that these coatings also lead to low friction and wear. The reason for improved tribological performance is believed to result from a nanocrystalline layer that forms in the sliding contact. In this paper, we use on-line wear measurement to study the dynamics of the running-in process. A pin-on-disk tribometer coupled to a radionuclide wear measurement (RNT) system was used to investigate the friction and wear behavior of wire arc spray (LDS) coatings sliding against chromium coatings under lubricated conditions. After the friction experiments, X-ray photo electron spectroscopy (XPS) and Focused Ion Beam analysis (FIB) was used to characterize the worn surfaces. By introducing a time-dependent Stribeck plot, we analyzed running-in under constant and transient sliding conditions and observed a strong reduction of friction in the boundary lubrication regime. Wear rates of the LDS disks as well as of the chromium plated pins are ultra ... mehr


Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Computational Materials Science (IAM-CMS)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1016/j.wear.2017.02.026
ISSN: 0043-1648, 1873-2577
KITopen ID: 1000070794
Erschienen in Wear
Band 376-377
Heft Part B
Seiten 1467–1474
Schlagworte Lubricated sliding wear, Thermal spray coatings, Running-in behavior, Tribochemistry
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