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期刊论文

Temperature dependence of the tribological properties of laser re-melted Al–Cu–Fe quasicrystalline plasma sprayed coatings

邵天敏L.P. Feng a* T.M. Shao a Y.J. Jin a E. Fleury b D.H. Kim c D.R. Chen a

Journal of Non-Crystalline Solids 351(2005)280-287,-0001,():

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摘要/描述

The aim of this study was to investigate the effect of temperature on tribological properties of plasma-sprayed Al-Cu-Fe quasicrystal (QC) coating after laser re-melting treatment. The laser treatment resulted in a more uniform, denser and harder microstructure than that of the as-sprayed coatings. Tribological experiments on the coatings were conducted under reciprocating motion at high frequency in the temperature range from 25 to 650℃. Remarkable influence of temperature on the friction behavior of the coating was recorded and analyzed. Microstructural analysis indicated that the wear mechanisms of the re-melted QC coatings changed from abrasive wear at room temperature, to adhesive wear at 400℃ and severe adhesive wear at 650℃ owing to the material transfer of the counterpart ball. It was also observed that the ratio of the icosahedral (i)-phase to b-Al50(Fe,Cu)50 phase in the coating was higher after test at 400℃ than that at 650℃. The variation of the ratio i/b of coating and of the property of the counterpart ball and coating with the temperature are the two main factors influencing the wear mechanisms and value of the friction coefficient.

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