Abstract
The tribological behavior of meso-carbon microbead (MCMB) powders of micron sizes extracted from heat-treated coal tar pitches was monitored on an Optimal SRV tribotester at 300 °C and 250N when blended as special boundary lubrication improvers into a pentaerythritol base oil. Structures of the original MCMB were revealed with TEM to be of layers of various sizes governed by the heat-treatment intensity in the manufacturing process. Raman spectroscopic analyses of the worn areas of steel tribomate indicated that the MCMB with richer initial ordered structures would be beneficial to the tribological transformation. A deduced correlation of the measured size of the yielded graphitic microcrystallites and the calculated friction heat-treatment intensity (W) justified the ease of the tribological transformation of the more ordered initial structures of MCMB.
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Xiaohao, C., Shenghua, L., Yuansheng, J. et al. A Study of Tribological Performance and Tribo-Induced Graphitization of Meso-Carbon Microbeads. Tribology Letters 14, 53–59 (2003). https://doi.org/10.1023/A:1021717000880
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DOI: https://doi.org/10.1023/A:1021717000880