Apparatus Comprising a CMC-Comprising Body and Compliant Porous Element Preloaded Within an Outer Metal Shell

A split shell transition comprising:

• a transition body comprising a ceramic matrix composite (CMC) wall, the transition body further comprising a forward end and an aft end;
• a split shell comprising two parts comprising metal that when joined together define a space adapted to contain the transition body, comprising a plurality of protrusions positioned to contact exterior contact surfaces of the transition body, and comprising a forward end adapted to attach to a combustion chamber and an aft end adapted to attach to a turbine inlet;
• a compliant porous element between the metal shell and the transition body;
• and
• a preload element contacting the transition body,
• wherein the preload element is adapted to urge the transition body toward at least one of the plurality of protrusions, and also to preload the compliant porous element.

An apparatus comprising:

• a ceramic body having an internal surface and an external surface;
• a compliant porous element that covers, at least in part, one of the ceramic body internal or external surfaces;
• a metal shell comprising a preload element in a first predetermined position and a plurality of load-limiting protrusions in other predetermined positions, the metal shell adapted to support the ceramic body and the compliant porous element;
• and
• a preload element in an urging orientation with the ceramic body,
• wherein the preload element urges the ceramic body toward the metal shell to preload the compliant porous element, and wherein at least one of the load-limiting protrusions is not in contact with the ceramic body under preload but is positioned to make contact during an operation of loading the apparatus.