hafnium/fatigue

BACKGROUND Portions of the present disclosure are contained within U.S. Pat. No. 6,919,042 which is hereby expressly incorporated by reference in its entirety. The present disclosure particularly relates to an improved oxidation and fatigue resistant metallic coating for protecting high temperature

BACKGROUND OF THE INVENTION The present invention generally relates to nickel-base alloy compositions, and more particularly to nickel-base superalloys suitable for components requiring a polycrystalline microstructure and high temperature hold time (dwell) capability, for example, turbine disks of

FIELD OF THE INVENTION The invention relates to high purity yttria or ytterbia stabilized zirconia powders for thermal barrier coatings for components intended to be used in cyclic thermal environments such as for gas turbine blades, vanes and seal surfaces exposed in the hot section of gas turbine

FIELD OF THE INVENTION The invention relates to thermally sprayed coatings for components intended to operate in cyclic thermal environments, said coatings having a substantial homogeneous dispersion of vertical macrocracks throughout the coating to improve their thermal fatigue

CROSS-REFERENCE TO RELATED APPLICATIONS Not Applicable BACKGROUND OF THE INVENTION As referred to herein, gun barrels or tubes are generally tubular structures through which projectile is fired. Gun barrels may have a smooth bore or be rifled to impart spin and stabilize the projectile being fired.