Tribological Performance of Silahydrocarbons Used as Steel-Steel Lubricants under Vacuum and Atmospheric Pressure

Table 1

Physical properties of these liquid lubricants.

Lubricants	Properties
	Saturated vapor; pressure/Torr, 25°C	Kinematic viscosity (mm^2·s^−1)				Density/kg·m^−3	TGA (onset decompositon; temperature/°C)	Pour point/°C
		−20°C	40°C	100°C	VI
SiCH-1	3.4×10^−9	2180	73.8	13.2	184	843.2	362	<−55
SiCH-2	6.2×10^−10	2621	86.6	15.4	189	851.0	387	<−55
SiCH-3	2.0×10^−10	3025	97.2	17.2	194	857.4	394	<−55
MACs	1.7×10^−8	2550	58.1	8.8	140	847.1	385	−55
PFPE-Z25	2.9×10^−12	—	160.5	48.4	350	1850.8	383	−73