Ceramic coatings in the war on wear

Halling, J.; Arnell, R.D.

doi:10.1016/0043-1648(84)90022-x

Cited by 35 publications

(16 citation statements)

References 10 publications

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“…Moreover, the substrate in sample 3 is the strongest among all samples. This demonstrates the major influence of coating thickness in asperity deformation while the influence of substrate diminishes with increase in coating thickness as concluded by Halling and Arnell [19]. The real contact areas of samples 1 and 2 are similar although sample 2 has a coating thickness twice the sample 1.…”

Section: Resultssupporting

confidence: 76%

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Evolution of real area of contact due to combined normal load and sub-surface straining in sheet metal

et al. 2020

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Understanding asperity flattening is vital for a reliable macro-scale modeling of friction and wear. In sheet metal forming processes, sheet surface asperities are deformed due to contact forces between the tools and the workpiece. In addition, as the sheet metal is strained while retaining the normal load, the asperity deformation increases significantly. Deformation of the asperities determines the real area of contact which influences the friction and wear at the tool-sheet metal contact. The real area of contact between two contacting rough surfaces depends on type of loading, material behavior, and topography of the contacting surfaces. In this study, an experimental setup is developed to investigate the effect of a combined normal load and sub-surface strain on real area of contact. Uncoated and zinc coated steel sheets (GI) with different coating thicknesses, surface topographies, and substrate materials are used in the experimental study. Finite element (FE) analyses are performed on measured surface profiles to further analyze the behavior observed in the experiments and to understand the effect of surface topography, and coating thickness on the evolution of the real area of contact. Finally, an analytical model is presented to determine the real area contact under combined normal load and sub-surface strain. The results show that accounting for combined normal load and sub-surface straining effects is necessary for accurate predictions of the real area of contact.

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Section: Resultssupporting

confidence: 76%

“…For simplicity, a constant substrate DX56 with zinc coating is used in the FE analyses. Which means that the sensitivity of the substrate material is not studied because the soft coating dominates the asperity flattening [19]. The material properties for other substrates are still required in the analytical model presented in Section 4.…”

Section: Assumptionsmentioning

confidence: 99%

Evolution of real area of contact due to combined normal load and sub-surface straining in sheet metal

et al. 2020

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“…The coefficients of friction as a function of the layer thickness predicted by using the model of Halling are also plotted in figures 5, 6 and 7. Those calculations were carried out by using the value for constant c (see equation (29)) equal to 10 in the cases of lead and indium layer on steel and c equal to 125 [15] in case of a carbon nitride layer on silicon. According to Halling, this constant should be experimentally determined.…”

Section: Discussionmentioning

confidence: 99%

Deterministic Friction Model of a Rough Surface Sliding Against a Flat Layered Surface

Pasaribu

Schipper

2004

Tribology Letters

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In this paper, a layered surface is modeled like a solid that has effective mechanical properties (E eff (x), m eff (x) and H eff (x)) as a function of indentation depth (x) and the rough surface is modeled as a population of spherically shaped asperities with different radii and heights (not necessarily Gaussian distributed). The contact behavior and the resistant to motion experienced by each asperity is analyzed locally and summarized as the total friction force based on the adhesion and ploughing mechanisms. The present model extends the capability of Halling's model to predict friction of layered surfaces. With this model, one is able to predict the friction of soft layer on a hard substrate and hard layer on a soft substrate in contact with a rough counter surface.

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“…In this technique, deposits are exposed to controlled microwave radiation during which further transformation of constituent phase(s) does take place, causing significant changes in the material characteristics [12,13]. Wear characteristics of sprayed ceramics and ceramic composites have been well investigated [14][15][16][17][18][19][20]. Wear behaviour of various composites under different in-service conditions have also been reported [21,22].…”

Section: Introductionmentioning

confidence: 99%

Sliding wear characterization of microwave-glazed plasma-sprayed ceramic composites

Sharma

Krishnamurthy

2010

Proceedings of the Institution of Mechanical Engineers, Part J:

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The main objective of the present study is to present the wear characteristics of postprocessed plasma deposits of alumina-titania (AT-13) ceramic composites under high-speed sliding. Spray deposits were post-processed (microwave glazed) by way of exposing them to microwave radiation at a frequency of 2.45 GHz in a multi-mode cavity by using the microwave hybrid heating principle. During 'microwave glazing', densification of the coating's structure takes place as a consequence of microwave-heating-induced phase transformation, leading to significant enhancement in hardness and reduction in porosity. Responses of the as-sprayed and microwave-glazed composites were monitored while they were subjected to sliding type of tribocontact at a speed of 5 m/s. Subsequent analyses are presented in terms of wear rate, pressure-velocity-time (p-v-t) characteristics, fractography, elemental count, and acoustic emission (AE) emanated during the trials. The results show a steady sliding wear response after an initial higher rate. The p-v-t factor analysis confirms a better operating condition with glazed composites. Glazed composites exhibit higher stability towards elemental transfer between the wear surface and the counter surface. AEs emanating during trials indicate deformation and brittle fracture as the dominating wear mechanisms of the as-sprayed and microwave-glazed ceramic composites.

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Ceramic coatings in the war on wear

Cited by 35 publications

References 10 publications

Evolution of real area of contact due to combined normal load and sub-surface straining in sheet metal

Evolution of real area of contact due to combined normal load and sub-surface straining in sheet metal

Deterministic Friction Model of a Rough Surface Sliding Against a Flat Layered Surface

Sliding wear characterization of microwave-glazed plasma-sprayed ceramic composites

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