Symbol or Abbreviation	Full Name
a-C	amorphous carbon
AFM	atomic force microscopy
AISI	American iron and steel institute
at. %	atomic percent
CoF	coefficient of friction
d	sliding distance [m]
DC	direct current
DIN	Deutsches Institut für Normung
DLC	diamond-like carbon
EDS	energy dispersive spectroscopy
E*	reduced Young’s modulus [Pa]
F	normal load [N]
FESEM	field emission scanning electron microscope
GDP	gross domestic product
GIXRD	grazing incidence X-ray diffraction
H	hardness [Pa]
Lc	critical load [N]
Mo-Se-C	molybdenum-selenium-carbon
MSPLD	magnetron-assisted pulsed laser deposition
MtCo2	megatons of CO2
NBR	nitrile butadiene rubber
POD	pin-on-disk
RF	radio frequency
RH	relative humidity
SEM	scanning electron microscope
SWR	specific wear rate
TMD	transition metal dichalcogenide
TMD-C	carbon alloyed transition metal dichalcogenide
TMDs	transition metal dichalcogenides
VDI	verein deustcher ingenieure
Vw	worn volume [mm3]
WDS	wavelength dispersive spectroscopy
W-S-C	tungsten-sulphur-carbon
Wr	specific wear rate [mm3/Nm]