Powder for forming the surfaces of the reach of application in a plasma and a segment of a piston having a hard coating of the reach

摘要

The invention relates to a coating intended to form the surfaces of the reach of the piston rings, as well as a powder for the formation of such a coating. / p & & p & according to the invention, the powder used contains 94 to 98% by weight of alumina and titanium dioxide with 2 to 6 by weight of yttrium oxide. The latter oxide reduced the tendency of the coating has the form of the swellings and a is ecailler during the use temperature high. In this manner, the disintegration has an internal consistency of the insufficient of the coating, is practically eliminated. / p & & p & application to the segments of the pistons of the internal combustion engines.