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Influence of graphite content on the tribological properties of plasma sprayed alumina-graphite coatings
ID
Marcinauskas, Liutauras
(
Author
),
ID
Mathew, Jacob Shiby
(
Author
),
ID
Milieška, Mindaugas
(
Author
),
ID
Aikas, Mindaugas
(
Author
),
ID
Kalin, Mitjan
(
Author
)
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https://www.sciencedirect.com/science/article/pii/S2468023023001335
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Abstract
The main aim of this research was to investigate the influence of graphite as an additive to a plasma-sprayed alumina coating matrix for tribological trends. For the deposition process, pure alumina and alumina with graphite (5%, 10% and 15%) weight percentage powders were used. The graphite-modified alumina coatings were formed on steel substrates by atmospheric plasma spraying using an air-hydrogen plasma. The influence of graphite content on the elemental composition, phase structure, friction coefficient, and specific wear rate was investigated. It was obtained that the addition of graphite enhanced the γ-Al2O3 phase content in the as-sprayed coatings. The highest γ-Al2O3 phase fraction was obtained when the amount of graphite in the feedstock powders was 10 wt.%. The elemental composition results indicated that the concentration of carbon in the alumina-graphite coatings was up to six times lower in comparison to the initial feedstock, and had varied from ∼1.7 to 2.45 wt.%. The incorporation of graphite slightly reduced the friction coefficient of the composite coatings due to the formation of a self-lubricating layer under dry-sliding conditions. The specific wear rates were in the range of ∼10−6 mm3/(Nm) for the alumina-graphite composite coatings, which were similar to the alumina coating, and were an order lower compared to the wear rate of steel.
Language:
English
Keywords:
plasma spraying
,
aluminium oxide
,
alumina-graphite coatings
,
friction
,
wear resistance
,
raman spectroscopy
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
Publication status:
Published
Publication version:
Author Accepted Manuscript
Year:
2023
Number of pages:
13 str.
Numbering:
Vol. 38, art. 102763
PID:
20.500.12556/RUL-144648
UDC:
531.43:539.92
ISSN on article:
2468-0230
DOI:
10.1016/j.surfin.2023.102763
COBISS.SI-ID:
144060931
Publication date in RUL:
07.03.2023
Views:
418
Downloads:
48
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Record is a part of a journal
Title:
Surfaces and interfaces
Publisher:
Elsevier
ISSN:
2468-0230
COBISS.SI-ID:
526516249
Secondary language
Language:
Slovenian
Keywords:
plazemsko pršenje
,
aluminijev oksid
,
alumina-grafitne prevleke
,
trenje
,
odpornost proti obrabi
,
ramanska spektroskopija
Projects
Funder:
Other - Other funder or multiple funders
Funding programme:
Research, Development and Innovation Fund of Kaunas University of Technology
Project number:
PP-88G/19
Funder:
Other - Other funder or multiple funders
Funding programme:
Internal funding of Lithuanian Energy Institute
Funder:
EC - European Commission
Funding programme:
COST Action - European Regional Development Fund
Project number:
CA15107
Name:
MultiComp
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0231
Name:
Tribologija
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