Tribological behavior of plasma electrolytic oxidation layers synthesized on AMg6 and D16 alloys in couples with cast iron SCh 21–40

The different nature of the effect of hydrogen on the tribological behavior of two carbon steels (st. 45 and st. U8) upon their contact with super solid plasma electrolytic oxidation (PEO) layers synthesized on two light alloys (AMg-6 and D16T alloys as the analogists of the A 95556 UNS USA and AA2024 ANSI USA alloys correspondently) was investigated in the medium of mineral oil of the I-20 type. To compare the effect of hydrogenation on the tribological properties of the analyzed contact pairs, similar tests were also performed on the same mineral oil with clear water or an aqueous solution of glycerine added to its content. A spinel-type film (hercynite) was formed upon friction of two contacting surfaces—the iron-carbon steels and PEO layers synthesized on the AMg-6 alloy. This film was a reliable protection against wear of the surface subjected to the effect of hydrogen. When steels came into contact with the PEO layers synthesized on the D16T alloy, surface protection against wear was ensured by another mechanism. The phenomenon of selective metal transfer in the friction zone (from one to another friction surfaces) was revealed.

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Tribological behavior of plasma electrolytic oxidation coatings on the surface of Mg–8Li–1Al alloy

Tribology International ◽

10.1016/j.triboint.2011.10.006 ◽

2012 ◽

Vol 47 ◽

pp. 62-68 ◽

Cited By ~ 24

Author(s):

Chunxiang Ma ◽

Milin Zhang ◽

Yi Yuan ◽

Xiaoyan Jing ◽

Xuefeng Bai

Keyword(s):

Plasma Electrolytic Oxidation ◽

Tribological Behavior ◽

Electrolytic Oxidation ◽

Plasma Electrolytic

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Tribological behavior of plasma electrolytic oxidation coating on magnesium alloy with oil lubrication at elevated temperatures

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2009.03.147 ◽

2009 ◽

Vol 481 (1-2) ◽

pp. 903-909 ◽

Cited By ~ 29

Author(s):

Jie Guo ◽

Liping Wang ◽

J. Liang ◽

Qunji Xue ◽

Fengyuan Yan

Keyword(s):

Magnesium Alloy ◽

Plasma Electrolytic Oxidation ◽

Elevated Temperatures ◽

Tribological Behavior ◽

Oil Lubrication ◽

Plasma Electrolytic Oxidation Coating ◽

Electrolytic Oxidation ◽

Plasma Electrolytic

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Low Frictional TiO2 and MoS2/TiO2 Coatings on Ti-6Al-4V Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.496.334 ◽

2012 ◽

Vol 496 ◽

pp. 334-338 ◽

Cited By ~ 3

Author(s):

Tse Cheng ◽

Zhi Jing Peng ◽

Xue Yuan Nie

Keyword(s):

Plasma Electrolytic Oxidation ◽

Solid Lubricant ◽

Tribological Behavior ◽

Anatase Tio2 ◽

High Load ◽

Tio2 Coating ◽

Pulsed Dc ◽

Wear Life ◽

Electrolytic Oxidation ◽

Plasma Electrolytic

TiO2 and MoS2/TiO2 coatings were prepared using a Plasma Electrolytic Oxidation (PEO) process at a unipolar pulsed-DC mode. Both coatings, mainly comprised of anatase TiO2, exhibited a low coefficient of friction, C.O.F < 0.21 for the TiO2 coating and C.O.F < 0.16 for the MoS2/TiO2 coating, while the MoS2/TiO2 coating had a longer wear life than TiO2-coated and uncoated Ti alloy (Ti-6Al-4V). This result showed that the solid lubricant MoS2 may play a significant role in the tribological behavior and it can be applied to many high load-bearing systems in aerospace and automotive industries.

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