Tribological properties of gas detonation composite coatings for pistons of combustion engines
It is investigated the wear resistance and antifriction properties of coatings of piston internal combustion engine, obtained through gas detonation spraying alumo matrix composite. It was found that the wear resistance and antifriction properties of these coatings are far superior to the properties of standard aluminum alloy piston. It is found that the minimum value of the coefficient of friction coating composition № 1 (70% Al + 30% C + B4C) is 0.015 in a wide load range from 4.9 to 6.86 MPa. The coefficient of friction coating composition № 2 (70% Al + 30% of the UDA + B4C) reaches its minimum value equal to 0.02, at 5.88 MPa.