A Method for Reducing Coefficient of Friction by Surface Modification
A surface modification and friction coefficient technology, applied in gaseous chemical plating, metal material coating process, coating, etc., can solve the problems of lower friction coefficient, low silane graft density, thin coating, etc., to achieve good friction reduction Effect, practical effect
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Embodiment 1
[0018] Clean the friction pair ultrasonically with acetone, tetrahydrofuran, N,N-dimethylformamide, and distilled water for 15 minutes each, and then dry them. Then irradiated with ultraviolet light for 1.5h, coated the ethanol solution of 10wt% perfluorooctyltrichlorosilane on the friction pair and dried at 60°C, and repeated coating 4 times to make the coating thickness reach 92nm. Using pure water as a lubricant, start the main engine, and the friction pair starts to work. Under the contact pressure of 400MPa, the measured friction coefficient is 0.12 (such as figure 1 shown in curve B), and can be maintained for about 3.5 hours. Under the same working conditions, the measured friction coefficient of the friction pair not modified by this method is 0.65 (such as figure 1 shown in curve A).
Embodiment 2
[0020] After ultrasonically cleaning the friction pair with acetone, tetrahydrofuran, N,N-dimethylformamide and distilled water for 25 minutes, dry them. Then, it was treated with oxygen plasma for 1 h, and the ethanol solution of 5 wt % perfluorooctyltrichlorosilane was coated on the first friction body, and dried at 60° C., and the coating was repeated 3 times, so that the thickness of the coating reached 55 nm. , 8wt% ethanol solution of decyltrichlorosilane was coated on the second friction body, and dried at 40° C., and the coating was repeated 6 times to make the coating thickness reach 120 nm. With engine oil as lubricant, start the main engine, and the friction pair composed of the first friction body and the second friction body starts to work. Under the contact pressure of 340MPa, the measured friction coefficient is 0.03 (such as figure 1 shown in curve C). , and can be maintained for about 5 hours. Under the same working conditions, the measured friction coeffici...
Embodiment 3
[0022] Clean the friction pair ultrasonically with acetone, tetrahydrofuran, N,N-dimethylformamide, and distilled water for 30 minutes each, and then dry them. Then, it was treated with oxygen plasma for 2 hours, and a toluene solution of 7 wt % dodecyltrichlorosilane was coated on the first friction body, and dried at 50° C., and the coating was repeated 4 times to make the coating thickness reach 82 nm. A 10 wt% ethanol solution of propyltrichlorosilane was coated on the second friction body, and dried at 40° C., and the coating was repeated 5 times to make the coating thickness reach 114 nm. Using liquid paraffin as lubricant, start the main engine, and the friction pair composed of the first friction body and the second friction body starts to work. Under the contact pressure of 600MPa, the measured friction coefficient is 0.05 (such as figure 1 Shown in curve C), and can be maintained for about 7 hours. Under the same working conditions, the measured friction coefficient...
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