Nickel base single crystal superalloy with improved oxydation resistance and process for producing it.

摘要

The improvement is obtained by adding to the alloy at least one element chosen from erbium and silicon, at a weight concentration of 50 to 500 ppm in the case of Er and 500 to 1000 ppm in the case of Si, and optionally hafnium in a weight concentration of 500 to 1000 ppm.