Method for fabricating and inspecting coatings

A method of fabricating an annular component having a coating with a metal volume fraction of no greater than 0.5 thereon and for measuring at least one physical property of the coating, comprising the steps of:

• rotating the component relative to a sprayed stream of metal particles and other material having low conductivity relative to that of the metal particles, wherein the metal particles and the other material are deposited onto the surface of the component;
• and
• directly determining density of the coating using multifrequency eddy current techniques as the particles and the other material are being deposited onto the surface of the compound.

A method of fabricating an annular component having a coating with a metal volume fraction of no greater than 0.5 thereon and for measuring at least one physical property of the coating, comprising the steps of:

• rotating the component relative to a sprayed stream of metal particles and other material having low conductivity relative to that of the metal particles, wherein the metal particles and the other material are deposited onto the surface of the component;
• and
• using eddy current techniques as the coating is deposited to determine density of the coating indicative of at least one of erosion resistance and abradability of the coating at a plurality of points in a thickness of the coating.

A method for inspecting a non homogenous coating comprised of a metal material and another material of at least one type selected from the group consisting of a non metal material, a gas and mixtures thereof, the coating having a metal volume fraction of no greater than 0.5, the method comprising the step of:

• using eddy current techniques to determine thickness of the coating based on a rolloff frequency.

A method of fabricating an annular component having a coating with a metal volume fraction of no greater than 0.5 thereon and for measuring at least one physical property of the coating, comprising the steps of:

• rotating the component relative to a sprayed stream of metal particles and other material having low conductivity relative to that of the metal particles, wherein the metal particles and the other material are deposited onto the surface of the component;
• and
• determining thickness of the coating using eddy current techniques based on rolloff frequency.