28-04-2014, 02:58 PM
Scuffing resistance of coated piston skirts run against cylinder bores
ABSTRACT
Piston skirt/cylinder bore scuffing is one of the main failure mechanisms that affect the life of automotive engines. The purpose of this research is to study hot scuffing and wear resistance of piston skirts with different surface textures and coatings running against cylinder bore using an apparatus which can simulate the relative motion between the piston and cylinder bore. The experimental studies involve three skirt coatings with two different skirt surface textures running against bore surfaces made of three different aluminum alloys and cast iron. In addition to the scuffing performance, this work also analyzes the microstructure and morphology features of the surfaces and the sub-surfaces of the pistons and cylinder bores.