Lubricant-surface interactions of polymer-coated engine journal bearings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F17%3APU136189" target="_blank" >RIV/00216305:26310/17:PU136189 - isvavai.cz</a>

Výsledek na webu

<a href="http://apps.webofknowledge.com.ezproxy.lib.vutbr.cz/full_record.do?product=WOS&search_mode=GeneralSearch&qid=9&SID=E6JXvEJHJpsw8EibggE&page=1&doc=1" target="_blank" >http://apps.webofknowledge.com.ezproxy.lib.vutbr.cz/full_record.do?product=WOS&search_mode=GeneralSearch&qid=9&SID=E6JXvEJHJpsw8EibggE&page=1&doc=1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.triboint.2017.01.017" target="_blank" >10.1016/j.triboint.2017.01.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Lubricant-surface interactions of polymer-coated engine journal bearings

Popis výsledku v původním jazyce

This work provides the methodology for the improved understanding of tribocontacts with tribolayers formed from the interactions of an engine oil and the surface of a journal bearing under boundary lubricating conditions. In particular, advanced surface characterisation combining X-ray photoelectron spectroscopy (XPS) and high resolution mass spectroscopy (MS) contributed to integrated knowledge on tribochemical and tribomechanical processes in the tribocontact studied. An engine connecting rod bearing lubricated with commercial OW-20 GF5 engine oil was evaluated as part of the tribosystem. Bearing material was a recently developed polymer-based overlay which increased in popularity in the automotive market owing to the durability and superior tribological properties. After engine bench tests and fatigue experiments, conventional oil analyses showed only minor changes regarding oil chemistry whereas MS revealed significant additive degradation, e.g., formation of organic phosphates from ZDDP and depletion of tris(2,4-di-tert-butylphenyl) phosphite additive. Regarding the fatigue experiments, surface analysis by XPS showed the formation of tribofilms with a thickness only in the range of a few nanometers and composed of P, S and Zn, i.e., mainly elements in ZDDP. This publication reports for the first time on surface characterisation by laser desorption ionisation MS applied to engine journal bearings: the presence of an organic phosphorus compound the origin of which is assumed from ZDDP could be revealed by this approach.

Název v anglickém jazyce

Lubricant-surface interactions of polymer-coated engine journal bearings

Popis výsledku anglicky

This work provides the methodology for the improved understanding of tribocontacts with tribolayers formed from the interactions of an engine oil and the surface of a journal bearing under boundary lubricating conditions. In particular, advanced surface characterisation combining X-ray photoelectron spectroscopy (XPS) and high resolution mass spectroscopy (MS) contributed to integrated knowledge on tribochemical and tribomechanical processes in the tribocontact studied. An engine connecting rod bearing lubricated with commercial OW-20 GF5 engine oil was evaluated as part of the tribosystem. Bearing material was a recently developed polymer-based overlay which increased in popularity in the automotive market owing to the durability and superior tribological properties. After engine bench tests and fatigue experiments, conventional oil analyses showed only minor changes regarding oil chemistry whereas MS revealed significant additive degradation, e.g., formation of organic phosphates from ZDDP and depletion of tris(2,4-di-tert-butylphenyl) phosphite additive. Regarding the fatigue experiments, surface analysis by XPS showed the formation of tribofilms with a thickness only in the range of a few nanometers and composed of P, S and Zn, i.e., mainly elements in ZDDP. This publication reports for the first time on surface characterisation by laser desorption ionisation MS applied to engine journal bearings: the presence of an organic phosphorus compound the origin of which is assumed from ZDDP could be revealed by this approach.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/LO1211" target="_blank" >LO1211: Centrum materiálového výzkumu na FCH VUT v Brně - udržitelnost a rozvoj</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Tribology International

ISSN

0301-679X

e-ISSN

1879-2464

Svazek periodika

109

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

519-528

Kód UT WoS článku

000395611500056

EID výsledku v databázi Scopus

2-s2.0-85010901139