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.com
Volume 08
Research & Reviews: Journal of Engineering and Technology
ISSN: 2319-9873
Automobile Europe 2019
July 08-09, 2019
6
th
International Conference and Exhibition on
July 08-09, 2019 | Zurich, Switzerland
Automobile & Mechanical Engineering
3D digital microscopic examination of graphene coated engine cylinder liner surface
Zeynep Agacdelen
1
, Hakan Kaleli
2
, Veli Uysal
2
and
Emre Çitak
3
1
Istanbul Aydın Üniversity, Turkey
2
Yıldız Technical University, Turkey
3
GrafenBioTech Nano Teknoloji, Turkey
F
uel combustion in automobile engines causes gaseous emissions, which in turn causes damage to the environment
when automobile production increases. This can be solved by increasing the efficiency of the engine, and as
the efficiency increases, fuel consumption is reduced. An engine cylinder liner is affected high-temperature and
high-pressure gas and always cause high-speed slide friction with piston rings and piston skirt. If liner surfaces are
properly configured, tribological behavior can be achieved. Functional surface treatments and coatings provide to
improve the sliding properties of metal surfaces. The inner walls of the cylinder must be able to withstand higher
combustion pressure and higher piston speed, so that the surface of the cylinder must be resistant to friction and
abrasion. Nowadays, it is desired to obtain the most efficient surface by applying different coatings to these surfaces.
A lot of different types of Nano-coatings are used for this process. Nowadays, nano coatings are preferred because
they are more advantageous than conventional coatings. In this study, the diesel engine cylinder liner is coated with
graphene using chemical vapour deposition (CVD) technique on the small cut-pieces of cylinder liner surface. The
graphene coating was successfully deposited on cylinder liner as monolayer, by direct synthesized CVD method
under vacuum conditions using hydrogen flux synthesizing with hexane vapor in new design CVD reactor. This
coating rights belongs to GrafenBioTech Nanotechnology engineering Ltd. in Konya-Turkey. Friction properties
of (CVD) graphene coated liner were tested experimentally in tribotest rig. The tribometer tests were carried out
100CrMn6 balls rubbing on coated and uncoated cylinder liners using 5w40 synthetic engine oil, under boundary
lubrication conditions. The coated liner material is a spheroidal graphite cast iron. 2D and 3D micrographs, 2D and
3D surface roughness parameters were presented. Graphene coating showed slightly lower friction value between
ball and coated cylinder liner pairs related non-coated liner. No wear exist on the ball surface while abrasive wear
lines-grooves occured on the rubbed surface of non coated and coated liner (with protective layers).
Biography
Mechanical Engineer, Msc. Student in Aydin University.
zeynepagacdelen@gmail.comZeynep Agacdelen et al., JET 2019, Volume 08