| 摘要 |
A system may include a blade track or blade shroud and a gas turbine blade that includes a blade tip. The blade track or blade shroud may include a substrate and an abradable layer formed over the substrate. The abradable layer may include at least one of zirconia or hafnia; ytterbia; samaria; and at least one of lutetia, scandia, ceria, gadolinia, neodymia, or europia. The abradable layer may include a porosity between about 25 vol. % and about 50 vol. %. The blade track or blade shroud and the gas turbine blade may be configured so the blade tip contacts a portion of the abradable layer during rotation of the gas turbine blade, and the abradable layer may be configured to be abraded by the contact by the blade tip. |
| 主权项 |
1. A system comprising:
a blade track or blade shroud comprising:
a substrate, andan abradable layer formed over the substrate, wherein the abradable layer comprises:
at least one of zirconia or hafnia,ytterbia,samaria, andat least one of lutetia, scandia, ceria, gadolinia, neodymia, or europia, wherein the abradable layer comprises a porosity between about 25 vol. % and about 50 vol. %; and a gas turbine blade comprising a blade tip, wherein the blade track or blade shroud and the gas turbine blade are configured so the blade tip contacts a portion of the abradable layer during rotation of the gas turbine blade, and wherein the abradable layer is configured to be abraded by the contact by the blade tip. |
