Apparatus, turbine nozzle and turbine shroud

A turbine nozzle, comprising:

• an outside wall, the outside wall including a metal having a first thermal tolerance;
• a fairing, the fairing including a ceramic matrix material composite having a second thermal tolerance greater than the first thermal tolerance;
• a sealing member disposed between and contacting the outside wall and the fairing, the sealing member including a third material composition having a third thermal tolerance less than the second thermal tolerance, the third thermal tolerance being less than an operating temperature of the fairing;
• and
• a thermal break defined by the fairing as a channel, the thermal break proximate to the sealing member and partitioned from the sealing member by a portion of the fairing, the thermal break interrupting a thermal conduction path from the fairing to the sealing member,
• wherein the outside wall and the fairing compress the sealing member, forming a thermal gradient-tolerant seal,
• wherein the sealing member includes a cross-sectional width along the outside wall and the fairing, and the cross-sectional width of the sealing member is disposed entirely radially outward or radially inward of the thermal break and is partitioned entirely from the thermal break by the portion of the fairing, and
• wherein the sealing member contacts the fairing only at the portion of the fairing.

A turbine shroud, comprising:

• an outer shroud, the outer shroud including a metal having a first thermal tolerance;
• an inner shroud, the inner shroud including a ceramic matrix material composite having a second thermal tolerance greater than the first thermal tolerance;
• a sealing member disposed between and contacting the outer shroud and the inner shroud, the sealing member including a third material composition having a third thermal tolerance less than the second thermal tolerance, the third thermal tolerance being less than an operating temperature of the inner shroud;
• and
• a thermal break defined by the inner shroud as a channel, the thermal break proximate to the sealing member and partitioned from the sealing member by a portion of the inner shroud, the thermal break interrupting a thermal conduction path from the inner shroud to the sealing member,
• wherein the outer shroud and the inner shroud compress the sealing member, forming a thermal gradient-tolerant seal,
• wherein the sealing member includes a cross-sectional width along the outer shroud and the inner shroud, and the cross-sectional width of the sealing member is disposed entirely radially outward or radially inward of the thermal break and is partitioned entirely from the thermal break by the portion of the inner shroud, and
• wherein the sealing member contacts the inner shroud only at the portion of the inner shroud.