Ceramic assembly and method of forming the same

A ceramic assembly, comprising:

• a body comprising ceramic grains sintered to one another, wherein a thickness of the body, between first and second major surfaces thereof, is in a range from 3 μm to 1 mm, and the first and second major surfaces of the body have an unpolished granular profile such that the unpolished granular profile includes grains protruding outward from a respective major surface with a height of at least 25 nm and no more than 150 μm relative to recessed portions of the respective major surface at boundaries between respective grains;
• a coating overlaying the unpolished granular profile of the first major surface, wherein an outward facing surface of the coating is less rough than the unpolished granular profile of the first major surface, the coating is disposed over a portion of an edge portion, and the edge portion comprises an outer peripheral edge circumscribing the body;
• and
• an adhesion promoter is positioned between the body and the coating.