Experimental and numerical evaluation of the mechanical properties of compacted wear debris layers formed between composite and steel surfaces in sliding contact

The behavior of zinc dithiophosphate (ZnDTP) is investigated for the antiwear properties in SiC-steel and Si3N4-steel sliding contact systems under boundary lubrication. Reaction products formed on the steel surfaces under the sliding contact differ in the chemical compositions and the thickness between these couples. These differences are specifically related to the physical properties of mating materials such as heat conductivity and friction coefficient. The reaction products are analyzed by SEM (scanning electron microscope), EPMA (electron probe microanalysis), AES (Auger electron spectroscope), and PAS (photoacoustic spectroscopy), and it is confirmed that iron phosphate for SiC-steel and iron phosphate and zinc sulfide (or some complex compound containing equal amounts of Zn and S in atomic ratio) for Si3N4-steel couple exist on the steel surface, respectively. An examination is conducted on steel-steel couple in comparison with ceramics-steel couples, and the atomic ratio (Zn:P:S) of the constituent elements of the reaction products coincides fairly with that of SiC-steel couple.

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The effect of ceramic tribo-elements on friction and wear of smooth steel surfaces

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

10.1177/1350650118780779 ◽

2018 ◽

Vol 233 (3) ◽

pp. 456-465

Author(s):

Andrzej Dzierwa ◽

Pawel Pawlus ◽

Rafal Reizer

Keyword(s):

White Light ◽

Wear Debris ◽

Friction And Wear ◽

Sliding Friction ◽

Wear Volume ◽

Dry Sliding ◽

Pin On Disc ◽

Optical Profilometer ◽

42Crmo4 Steel ◽

Steel Surfaces

The pin-on-disc dry sliding friction and wear experiments have been made on 42CrMo4 steel in contact with Si3N4, SiC, WC, Al2O3, and ZrO2 ceramic balls. The tests were carried out at sliding speeds of 0.16 m/s, 0.24 m/s, and 0.32 m/s. During the tests, the friction force was monitored as a function of time. Discs and balls wear was measured after the tests using a white light interferometer Talysurf CCI Lite and Altisurf 520 optical profilometer with a CL1 confocal probe. To decrease variations in the experimental results, during the tests, wear debris was continuously removed from the disc surfaces. It was found out that with Al2O3 counterpart the wear volume of the steel discs was the largest. However, the largest wear volume of the balls was observed for Si3N4 ceramic balls.

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Mechanical Properties of Steel Surfaces Coated with HfN/VN Superlattices

Journal of Materials Engineering and Performance ◽

10.1007/s11665-014-1194-2 ◽

2014 ◽

Vol 23 (11) ◽

pp. 3963-3974 ◽

Cited By ~ 6

Author(s):

C. Escobar ◽

M. Villarreal ◽

J. C. Caicedo ◽

W. Aperador ◽

P. Prieto

Keyword(s):

Mechanical Properties ◽

Steel Surfaces

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RVE Based Numerical Evaluation on Effective Mechanical Properties of Composite with Randomly Distributed Multi-Phase Inclusions

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.931 ◽

2011 ◽

Vol 383-390 ◽

pp. 931-934

Author(s):

Chun Li ◽

Lei Chen ◽

Li Qiao

Keyword(s):

Mechanical Properties ◽

Numerical Evaluation ◽

Composite Ceramic ◽

Homogenization Theory ◽

Numerical Homogenization ◽

Cell Models ◽

Experiment Data ◽

Sequential Adsorption ◽

Multi Phase ◽

Effective Mechanical Properties

The purpose of this paper is to evaluate the effective mechanical properties of composite ceramic with randomly distributed multi-phase inclusions. The RVE finite element subcell technique based on numerical homogenization theory is used to separate the multi-phase composite into the layered unit cell models which are generated by a modified random sequential adsorption algorithm (RSA). The numerical results are also compared and verified with experiment data.

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