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© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

The tribological performance of a thermal sprayed, mirror-like surface with localized protuberances was investigated through tribotests and computational simulation. A composite coating with a 410L steel matrix and M2 tool steel hard particles was applied by the cold spray process as a bore coating for combustion engines. The presence of protuberances promoted the quick formation of an antifriction tribofilm when tested with an SAE 0W-16 containing ZDDP and MoDTC, which significantly reduced the asperity friction in comparison to the conventional engine coated bores in reciprocating tribological tests. An in-house computational model using deterministic numerical methods was used for the mixed and hydrodynamic lubrication regime. Lubricant film thickness and friction were simulated for a piston ring versus the proposed coating. The computer simulations showed that the protuberances reduced the hydrodynamic friction by increasing the otherwise very thin oil film thickness of mirror-like surfaces. Although not intuitive, this result was caused by the reducing of the oil film shear rate.

Details

Title
Tribological Performance of a Composite Cold Spray for Coated Bores
Author
Tomanik, Eduardo 1 ; Aubanel, Laurent 2 ; Bussas, Michael 3 ; Delloro, Francesco 2   VIAFID ORCID Logo  ; Lampke, Thomas 3   VIAFID ORCID Logo 

 Polytechnic School, Sao Paulo University, Sao Paulo 05508-010, Brazil 
 Mines Paris, MAT—Centre des Matériaux, PSL Research University, F-75005 Paris, France; [email protected] (L.A.); [email protected] (F.D.) 
 Institute of Materials, Science and Engineering, Chemnitz University of Technology, D-09107 Chemnitz, Germany; [email protected] (M.B.); [email protected] (T.L.) 
First page
127
Publication year
2023
Publication date
2023
Publisher
MDPI AG
e-ISSN
20754442
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2791667322
Copyright
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.