Patent ID: 7846561

Claim:
A portion of an engine comprising: a surface coated with a ceramic coating having a thickness and a surface area, said coating comprising a plurality of ceramic particles and corresponding particle interfaces, with at least some of said ceramic particles being partially bonded together, and said coating having a change in said particle interfaces through the thickness of said coating, across the surface area of said coating or both; wherein said coating exhibits a corresponding change in the ability of said coating to impart at least one functional characteristic to said engine portion through the thickness of said coating, across the surface area of said coating or both; wherein said coating comprises a multilayered ceramic coating having: an inner layer formed at least partially from hollow particle feedstock comprising hollow particles; and an outer layer formed at least partially from solid particle feedstock comprising fused and crushed powders; and wherein said coating effects damping of vibrations through internal friction between said particle interfaces and the hollow particles result in splat interfaces causing an increase in interfaces.