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Surface Enhanced Flake Graphite and its Utility as a Functional Extender for Molybdenum Disulfide
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From Asbury Graphite Mills
Abstract: The performance of surface enhanced natural flake graphite (SEFG) was studied to determine its utility as a functional extender for molybdenum disulfide in PAO grease. The SEFG was compared to conventional flake graphite and high surface area synthetic graphite in the same application. Friction and wear performance were evaluated using ASTM D2266 and D2596. Graphite and molybdenum disulfide concentrations were varied at 0%, 2.5%, and 5% of each component. Total solid lubricant phase was maintained at 5% except in the neat grease. The data showed that grease with added solid lubricant out performed neat grease in all cases. Surface enhanced flake graphite outperformed conventional flake graphite and high surface area synthetic graphite. The trend in the data collected indicated that surface enhanced flake graphite can be substituted up to 50 weight percent for molybdenum disulfide without degradation of grease performance. Products & Services
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