Abstract
The work presents the results of experimental studies of a solid lubricant based on indium and gallium, for operation in vacuum up to 10–6 mm Hg, having a low melting point and good wettability. This lubricant provides long-term operation of the friction unit with a stable low coefficient of friction at specific loads of up to 2.5 MPa. The composition of the lubricant introduced fine powders of copper and nickel. The design of a vacuum-stand for studying the work of friction pairs in vacuum and gases at pressures up to 10–6 mm Hg, loads up to 2.5 MPa and sliding speed of the samples 0.6 ÷ 2 m/s is described. As a result of experimental studies, it was found that the introduction into the composition of a solid lubricant containing molybdenum disulfide, indium, and gallium, additionally finely dispersed powders of copper and nickel, allows to increase the durability of the friction unit by 3–10 times and reduce the friction coefficient by 1.2–2 times.
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