Patent ID: 7921972

Claim:
A system suited to high power engines, comprising at least a rotor and means comprising active sections suitable for making rotate the rotor(s) due to their synchronised deformation, wherein the material of the rotor is composed of at least one of the materials taken from the group consisting of: an Al—Fe—V—Si alloy, with between 0.1 and 15% in weight in Fe, between 0.3 and 15% in weight in V, between 0.1 and 5% in weight in Si, the remainder being Al, and an Al—Fe—Ce alloy, with between 0.1 and 15% in weight in Fe, between 0.1 and 9% in weight in Ce, the remainder being Al; and an Al—Fe—Mo alloy, with between 0.1 and 15% in weight in Fe, between 0.3 and 9% in weight in Mo, the remainder being Al; and an Al—Fe—Cr—Ti alloy with between 0.5 and 10% atoms of Fe, between 0.4 and 8% atoms of Cr, between 0.3 and 5% atoms of Ti, the remainder being Al, and an Al—Fe—V alloy with between 0.1 and 15% in weight in Fe, between 0.1 and 5% in weight in V, the remainder being Al, the alloy comprising fine homogeneous grains and comprising at least one of the quantities taken from the group consisting of less than 0.3% in weight in relation to the overall weight of at least one of the materials taken from the group consisting of Mg, Zr, Ce and Sr, and less than 0.05% in weight of Ni.