Abstract

The composition, structure, properties and technology for producing the dispersion strengthened composite material of Al–Si–Ni–Fe–Al₂O₃–C–O system for the high performance internal combustion engine pistons were proposed. The prepared material depending on the chemical composition has a tensile strength from 600 to 650 MPa at normal temperature with a relative elongation of 1,7 to 2,5 % and 180...195 MPa at a test temperature of 350 °C. The coefficient of linear thermal expansion in a temperature test range of 20...150 °C is equal to (16,8...17,4)•10^-6 1/°C and at a temperature test range of 20...350 °C - (18,9...19,5)•10^-6 1/°C.