Hierarchical thermal shock-resistant coatings for environmental protection

A barrier coating that is resistant to delamination includes a glass-ceramic phase and a metallic phase. The glass-ceramic phase protects an underlying substrate against environmental hazards. The metallic phase provides ductile reinforcement of the barrier coating, in part, by forming a percolating network throughout the barrier coating, thus improving delamination resistance. In one example application, the barrier coating is applied to a component of an oxygen-rich turbopump (e.g., a turbine blade) for use in a reusable rocket engine. In this example, the barrier coating protects, for example, a component formed of a Ni superalloy against particle impact ignition by an oxygen-rich gas stream.