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

A manufacturing method, comprising:

• providing a preform component for a turbine engine, the preform component comprising a substrate;
• forming a preform aperture extending through the substrate;
• applying an internal coating to the preform aperture to provide a meter section of a cooling aperture;
• forming a preform diffuser section in the substrate;
• and
• applying external coating material over the substrate, the applying of the external coating material forming an external coating over the substrate, and the applying of the external coating material building up the external coating material within the preform diffuser section to form a diffuser section of the cooling aperture.

A manufacturing method, comprising:

• providing a preform component for a turbine engine, the preform component comprising a substrate configured with a meter section of a cooling aperture and a preform diffuser section, and the meter section lined with an internal coating;
• and
• applying external coating material over the substrate to
• form an external coating over the substrate;
• and
• build up the preform diffuser section to provide a final form diffuser section of the cooling aperture.