Ceramic matrix composite gas turbine vane

A turbine component comprising:

• a ceramic matrix composite member having an inside surface defining a core region;
• core member disposed in the core region and joined to the ceramic matrix composite member by a bond including at least 30% of the inside surface of the ceramic matrix composite member;
• and
• a cooling channel formed in the core member for the passage of a cooling fluid;
• wherein a coefficient of thermal expansion of the core member is in the range of >0 to 14% greater than a coefficient of thermal expansion of the ceramic matrix composite member.

A turbine component comprising:

• a ceramic matrix composite member having an inside surface defining a core region;
• a core member disposed in the core region and joined to the ceramic matrix composite member by a bond including at least 30% of the inside surface of the ceramic matrix composite member;
• and
• a cooling channel formed in the core member for the passage of a cooling fluid;
• wherein the core member has a mechanical strength that is less than a
• mechanical strength of the bond.

A turbine component comprising:

• a ceramic matrix composite member having an inside surface defining a core region;
• a core member disposed in the core region and joined to the ceramic matrix composite member by a bond including at least 30% of the inside surface of the ceramic matrix composite member;
• and
• a cooling channel formed in the core member for the passage of a cooling fluid;
• wherein a ratio of an elastic modulus of the core member to an elastic modulus of the ceramic matrix composite member is less than one half.

A turbine component comprising:

• a ceramic matrix composite member having an inside surface defining a core region;
• a core member disposed in the core region and joined to the ceramic matrix composite member by a band including at least 30% of the inside surface of the ceramic matrix composite member;
• and
• a cooling channel formed in the core member for the passage of a cooling fluid;
• wherein the cooling channel comprises a groove formed in an outer
• surface of the core member.

A turbine component comprising:

• a ceramic matrix composite member having an inside surface defining a core region;
• a corn member disposed in the core region and joined to the ceramic matrix composite member by a bond including at least 30% of the inside surface of the ceramic matrix composite member;
• and
• a cooling channel formed in the core member for the passage of a cooling fluid;
• wherein the cooling channel comprises:
• an inlet plenum formed along a length of the core member;
• a first plurality of grooves formed proximate an outside surface of the core member;
• and
• an opening between the inlet plenum and each of the first plurality of grooves.

A turbine component comprising:

• a ceramic matrix composite member having an inside surface defining a core region;
• a core member disposed in the core region and joined to the ceramic matrix composite member by a bond including at least 30% of the inside surface of the ceramic matrix composite member;
• and
• a cooling channel formed in the core member for the passage of a cooling fluid;
• wherein a first section of the core member comprises a material different than a second section of the core member.

A turbine component comprising:

• a ceramic matrix composite member having an inner surface defining a core region;
• a core member disposed in the core region and bonded to the ceramic matrix composite member inner surface;
• a cooling channel formed in the core member for the passage of a cooling fluid for removing heat from the core member, the bond between the core member and the ceramic matrix composite member providing a conductive heat removal pathway between the ceramic matrix composite member and the core member;
• wherein the core member is formed of a material having a mechanical strength that is less than a mechanical strength of the bond in order to safeguard the integrity of the heat removal pathway.