Increasing the lifetime of machine elements whose operation involves the development\nof friction processes and diminishing energy losses by friction can be achieved by using solid\nlubricants. In this regard, a method applied to improve the friction behavior of machine elements is\nelectrostatic coating of the surfaces of interest with polyester layers that include particles of solid\nlubricants, such as molybdenum disulfide or graphite. Experimental research was conducted to\nhighlight the influence of normal force, the concentration of solid lubricant particles in polyester,\nand specific sliding between surfaces involved in the friction process on the deposited layerâ??s\nlifetime and on the friction coefficient. Grey analysis was employed to identify sets of input factors\nthat would lead to the most convenient values of the lifetime and energy friction losses when using\npolyester layers that incorporate molybdenum or graphite particles. Specialized software was\nelaborated in a MATLAB environment to use the grey relational analysis in identifying the optimal\nvalues of the process input factors for distinct weights of the output parameters.
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