Aluminum alloy piston of internal combustion engine

The utility model discloses an aluminum alloy piston of an internal combustion engine. The top of the aluminum alloy piston is provided with a groove for forming a part of a combustion chamber and ceramic membranes are arranged on the top surface of the aluminum alloy piston and the inner wall of the groove. The thickness of the ceramic membrane on the top of the aluminum alloy piston discloses by the utility model reaches 2-3 times of the thickness of a positive electrode oxidation membrane; the thermal-insulation performance is good, under the same thermal-insulation experimental condition, the thermal-insulation temperature of the thermal-insulation membrane is about 15 DEG C higher than that of the positive electrode oxidation membrane; and the ablation resistance is good, the ceramic membrane can resist 2500 DEG C of instantaneous high temperature and cannot be molten if the instantaneous high temperature continues for 20 seconds. The bonding strength between the ceramic membrane and the aluminum alloy m