Heat shield element, method and mold for the production thereof, hot-gas lining and combustion chamber

A hot-gas lining, comprising:

• a plurality of heat-shield elements adjoining one another on peripheral surfaces of the heat-shield elements, wherein the heat-shield elements have:
• an exterior hot side to face toward a hot medium,
• an exterior cold side to face away from the hot medium,
• a peripheral side connecting the cold side to the hot side, and
• a central volume defined by the hot side, the cold side and peripheral sides, wherein the central volume comprises:
• a hot side material zone comprising the exterior hot side and a hot side material comprising a hot side material coefficient of thermal expansion,
• a cold side material zone comprising the exterior cold side and a cold side material comprising a cold side material coefficient of thermal expansion that is greater than the hot side material coefficient of thermal expansion,
• a perimeter material zone adjacent the peripheral side and spanning from the exterior hot side to the exterior cold side comprising a perimeter material comprising a perimeter material coefficient of thermal expansion that is greater than the hot side material coefficient of thermal expansion;
• an expansion gap;
• and
• a sealing-fluid feed to feed a sealing-fluid flow into the expansion gap to seal the expansion gap against an ingress of a hot medium.

A heat-shield element, comprising:

• an exterior hot side to face toward a hot medium;
• an exerior cold side to face away from the hot medium;
• first peripheral sides connecting the cold side to the hot side;
• second peripheral sides connecting the cold side to the hot side and separated by first peripheral sides;
• a central volume defined by the hot side, the cold side, the first peripheral sides, and the second peripheral sides, wherein the central volume comprises a central volume material, and a central volume material coefficient of thermal expansion, and
• a second perimeter material zone adjacent each second peripheral side, comprising a second perimeter material comprising a second perimeter material coefficient of thermal expansion that is greater than the central volume material coefficient of thermal expansion, the second perimeter material zones spanning a portion of a length between the exterior hot side to the exterior cold side, wherein the second peripheral side and the second perimeter material zone cooperate to form a surface of a groove, and
• a region of transition between the central volume material and the second perimeter material comprising a progressive transition from central volume material properties to second perimeter material properties.