A titanium article having a prospective coating and a method of applying a protective coating to a titanium article

摘要

A gamma titanium aluminide turbine blade (10) has a titanium oxide layer (20) on its outer surface. A protective coating (22) is applied to the aerofoil (12) and the platform (14) of the turbine blade (10) onto the titanium oxide layer (20). The protective coating (22) comprises a silicate glass having a chromium oxide filler. The protective coating (22) preferably comprise a boron titanate silicate glass having a chromium oxide filler. The oxide layer (20) adheres the protective coating (22) to the titanium aluminide turbine blade (10). The protective coating (22) provides oxidation and sulphidation resistance.