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Sliding friction and wear behaviors of plasma sprayed aluminum–bronze coating in artificial seawater
Author(s) -
Yang Jie,
Li Zhipeng,
Hou Guoliang,
An Yulong,
Zhou Huidi,
Chen Jianmin
Publication year - 2015
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5724
Subject(s) - seawater , materials science , tribology , silicon nitride , coating , artificial seawater , metallurgy , delamination (geology) , scanning electron microscope , abrasion (mechanical) , lubrication , lubricity , x ray photoelectron spectroscopy , lubricant , bronze , composite material , silicon , chemical engineering , geology , oceanography , paleontology , engineering , subduction , tectonics
The friction and wear behaviors of plasma sprayed aluminum–bronze (CuAl) coating sliding against silicon nitride (Si 3 N 4 ) in artificial seawater were investigated and compared with those in pure water and dry sliding. The morphologies of the worn surfaces were analyzed by three‐dimensional non‐contact surface mapping and scanning electron microscopy. Moreover, chemical states of the tribochemical products of CuAl/Si 3 N 4 in seawater were characterized by X‐ray photoelectron spectroscopy. Results show that the plasma sprayed CuAl coating possessed a specific wear rate (in order of 10 −7 mm 3 /Nm) in seawater more than 600 times smaller than that in dry sliding due to the great alleviation in abrasion wear and splats delamination. Besides, the CuAl/Si 3 N 4 had a friction coefficient of 0.06 in seawater, significantly lower and more stable than those in pure water and dry sliding. The tribochemical products of CuAl/Si 3 N 4 in seawater, which were proved to be silica, alumina, and their hydrates, transformed into a loosened wear‐debris layer under the coagulation effect of the seawater and dominated the excellent lubrication state in artificial seawater. Copyright © 2014 John Wiley & Sons, Ltd.