In the field of extreme high-temperature lubrication exceeding 400°C, molybdenum disulfide demonstrates significant advantages due to its oxidation initiation temperature as high as 1100° C. According to research data from the 2023 journal Tribology International, its coefficient of friction can be stably maintained at 0.06 to 0.08 within the range of 400°C to 600°C. The coefficient of friction after high-temperature failure of traditional polyalphaolefin lubricating oil is reduced by approximately 93% compared to over 1.2. NASA used molybdenum disulfide solid lubricating films in the robotic arm joints of the Mars probe Perseverance, successfully withof the nearly 100°C temperature difference between day and night on the Martian surface, extending the mechanism’s lifespan by more than 150% of the design index. This is equivalent to running without failure for over 100,000 cycles in ground simulation tests.
However, there is a critical point for the long-term stability of molybdenum disulfide in high-temperature oxidation environments. When the temperature consistently exceeds 500°C, its oxidation rate will increase by a mass loss of 0.5% per hour. Schaeffler Group of Germany found in bench tests of aero engine bearings that although the molybdenum disulfide coating could still maintain its lubricating function at a short-term peak temperature of 800°C, there would be a reduction of about 15% in film thickness after continuous operation for 300 hours. In contrast, the emerging MAX phase ceramic material exhibits a lower wear rate in a constant temperature environment of 700°C, with its volume wear being only 60% of that of molybdenum disulfide. This has prompted Boeing to adopt a hybrid lubrication scheme in its latest engine design.
In terms of cost-effectiveness, although high-purity molybdenum disulfide additives increase the initial cost of grease by 25%, they can extend the lubrication maintenance cycle of heavy machinery from 200 hours to 1,200 hours, and increase the return on investment by 40%. After China Baowu Group applied lubricants containing molybdenum disulfide in its hot continuous rolling production line, the annual replacement frequency of roll bearings was reduced from 12 times to 3 times, and the annual maintenance cost of a single production line was saved by more than 2 million yuan. This efficiency advantage was particularly prominent against the backdrop of the global energy crisis in 2022. According to the analysis of Siemens Industrial Software, enterprises adopting the molybdenum disulfide solution reduced their average energy consumption by 8%, which is equivalent to a reduction of 50 tons of carbon emissions per large piece of equipment per year.
A comprehensive assessment of the best application scenarios of molybdenum disulfide shows that its advantages are mainly concentrated in the medium and high-temperature range of 200°C to 500°C, within which the service life of equipment can be extended by more than three times. However, in the face of higher temperatures or strongly oxidizing environments, such as the core area of an aero-turbine engine (operating temperature exceeding 1000°C), Rolls-Royce of the UK has turned to plasmon-sprayed composite ceramic coatings. According to a 2024 report by market research firm Frost & Sullivan, molybdenum disulfide holds approximately 35% of the global high-temperature lubricant additive market share and is expected to maintain an average annual growth rate of 6.5% over the next five years, reflecting its irreplaceable value in specific industrial scenarios.