abstract a gas turbine component consists of a superalloy base material with a single crystal structure and a protective mcraly coating the mcraly coating has a g g u2032 single crystal structure which is epitaxial with the base material it has be determined the critical factors for the successful epitaxial and crack free growth of the mcraly coating application_number US 49001804 A description this invention is related to a method of epitaxially growing a mcraly coating 6 having a u03b3 u03b3 u2032 microstructure onto a surface 5 of an article 4 such as blades or vanes of gas turbines or any other part which is exposed to a hot temperature environment the article 4 has a single crystal sx structure and can be made as an example from a nickel base super alloy nickel base superalloys are known in the state of the art e g from the document u s pat no 5 888 451 u s pat no 5 759 301 or from u s pat no 4 643 782 which is known as u201c cmsx 4 u201d in general fig1 shows a laser cladding process which is characterized by impinging particles of the mcraly coating material with a powder jet 1 onto a molten pool 2 formed by controlled laser heating by scanning the laser beam 3 successively over the surface 5 of the single crystal article 4 the arrow 7 shows the direction of the movement.