Forming lined cooling aperture(s) in a turbine engine component

1. A manufacturing method, comprising:

providing a preform component for a turbine engine, the preform component comprising a substrate;

forming a meter section of a cooling aperture in the substrate;

applying an internal coating onto a surface of the meter section;

applying an external coating over the substrate; and

forming a diffuser section of the cooling aperture in the external coating and the substrate to provide the cooling aperture.

2. The manufacturing method of claim 1 , wherein the internal coating comprises an aluminide coating.

3. The manufacturing method of claim 1 , wherein

the substrate comprises metal; and

the external coating comprises ceramic.

4. The manufacturing method of claim 1 , further comprising:

applying a bond coating onto the substrate;

wherein the external coating is applied onto the bond coating; and

wherein the diffuser section is further formed through the bond coating.

5. The manufacturing method of claim 4 , wherein

the bond coating comprises MCrAlY or MAlCrX;

the M comprises at least one of nickel (Ni), cobalt (Co) or iron (Fe); and

the Y or the X comprises at least one of hafnium (Hf), yttrium (Y) or silicon (Si).

6. The manufacturing method of claim 1 , further comprising:

applying a bond coating onto at least a portion of the internal coating;

wherein the external coating is applied onto the bond coating; and

wherein the diffuser section is further formed through the bond coating.

7. The manufacturing method of claim 1 , wherein the meter section is formed using an electrical discharge machining process.

8. The manufacturing method of claim 1 , wherein the diffuser section is formed using a laser machining process.

9. The manufacturing method of claim 1 , wherein the preform component comprises a preform of an airfoil for the turbine engine.

10. The manufacturing method of claim 1 , wherein the preform component comprises a preform of a flowpath wall for the turbine engine.

11. The manufacturing method of claim 1 , further comprising:

modeling the external coating to predict a geometry of the preform component following the application of the external coating;

wherein the diffuser section is formed in the external coating and the substrate based on the predicted geometry.

12. The manufacturing method of claim 11 , wherein the modeling is performed using artificial intelligence.

13. The manufacturing method of claim 11 , wherein the modeling is performed using machine learning.

14. The manufacturing method of claim 1 , further comprising:

scanning at least a portion of the substrate, the internal coating and the external coating with an imaging system to provide scan data indicative of an internal structure of the portion of the substrate, the internal coating and the external coating; and

wherein the diffuser section is formed in the external coating and the substrate based on the scan data.

15. The manufacturing method of claim 14 , wherein the imaging system comprises a microwave imaging system.

16. A manufacturing method, comprising:

providing a preform component for a turbine engine, the preform component comprising a substrate;

machining a meter section into the substrate;

lining at least a portion of the meter section with an internal coating to provide a lined meter section of a cooling aperture;

forming an external coating over the substrate with the lined meter section; and

machining at least a portion of a diffuser section of the cooling aperture into the external coating.

17. The manufacturing method of claim 16 , wherein

the substrate comprises metal;

the internal coating comprises an aluminide coating; and

the external coating comprises ceramic.