An investigation of fretting wear behaviour of nickel coatings for electrical contacts application in dry and lubricated conditions

Fretting wear is a complex phenomenon that occurs at component interfaces that are subjected to low amplitude oscillation under high contact pressure. In turbomachinery fretting occurs also at the blade tip interfaces where shrouds, that have the aim to reduce the blade resonant vibration amplitude, are machined. To diminish the fretting damage coatings are applied to the blade tips. The aim of this study is to compare the fretting wear behaviour of single crystal CMSX-4 superalloy interfaces with and without plasma sprayed T-800 coating. Experiments have been conducted with hemispherical surface in contact with a flat surface of the same materials at temperature of 800 °C. The hysteresis cycles have been measured through the experiment. The comparison of the hysteresis cycles shown that the tangential contact stiffness of the coated surfaces is greater then that of the surfaces without coating. At the end of wear process, the mating surfaces have been characterized by three-dimensional optical interferometry and SEM analysis. After 10×106 wear cycles, the uncoated surfaces show a large change in the contact parameters and fretting cracks on the flat surface. On the other hand, the coated surfaces do not shows a measurable change in the contact parameters while the coating damage on the flat surface leads to predict an incipient catastrophic wear.

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Fretting wear behaviour of microarc oxidation coatings formed on titanium alloy against steel in unlubrication and oil lubrication

Applied Surface Science ◽

10.1016/j.apsusc.2005.10.032 ◽

2006 ◽

Vol 252 (23) ◽

pp. 8113-8120 ◽

Cited By ~ 41

Author(s):

Yaming Wang ◽

Tingquan Lei ◽

Lixin Guo ◽

Bailing Jiang

Keyword(s):

Titanium Alloy ◽

Microarc Oxidation ◽

Fretting Wear ◽

Wear Behaviour ◽

Oil Lubrication

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Fretting wear behaviour and frictional force mapping of Al2O3 based thermal barrier coatings

International Journal of Refractory Metals and Hard Materials ◽

10.1016/j.ijrmhm.2021.105525 ◽

2021 ◽

pp. 105525

Author(s):

S. Ariharan ◽

Kantesh Balani

Keyword(s):

Thermal Barrier Coatings ◽

Frictional Force ◽

Fretting Wear ◽

Wear Behaviour ◽

Thermal Barrier ◽

Barrier Coatings ◽

Force Mapping

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Design effects on the fretting wear behaviour of ball bearings

Tribology International ◽

10.1016/s0301-679x(97)00071-6 ◽

1997 ◽

Vol 30 (10) ◽

pp. 773-778 ◽

Cited By ~ 4

Author(s):

M. Shima ◽

Li Qijun ◽

S. Aihara ◽

T. Yamamoto ◽

J. Sato ◽

...

Keyword(s):

Fretting Wear ◽

Wear Behaviour ◽

Ball Bearings ◽

Design Effects

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Tribological Wear Behaviour of Electrical Contacts Made from AgNi10 Composite

Archives of Metallurgy and Materials ◽

10.1515/amm-2017-0299 ◽

2017 ◽

Vol 62 (4) ◽

pp. 2007-2013 ◽

Cited By ~ 1

Author(s):

M.W. Richert ◽

G. Boczkal ◽

A. Hotloś ◽

P. Pałka ◽

M. Karpiński

Keyword(s):

Electrical Properties ◽

Electrical Resistance ◽

Alternating Current ◽

Electrical Contacts ◽

Contact System ◽

Wear Behaviour ◽

Duty Cycles ◽

High Degree

AbstractThe effect of tribological wear of contacts made from an AgNi10 alloy on microstructure and electrical properties was investigated. The contacts were tested in duty cycles loaded with alternating current of 10A intensity. With this value of the current, intensive arcing of contacts occurred. The contacts were tested in the range of 125 to 500 thousand cycles. The contacting surfaces were reported to suffer a high degree of wear, but electrical resistance of the contact system remained stable.

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