CCS and Power Systems
Advanced Energy Systems - Hydrogen Turbines
High Temperature Unique Low Thermal Conductivity Thermal Barrier Coating (TBC) Architectures
Project No: SC0004356
Two different materials have been selected for the development of higher temperature thermal barrier coatings (TBCs): (1) Pyrochlore oxides (specifically, gadolinium zirconate; Gd2Zr2O7 [GZO]) and (2) Modified Std. yttria-stabilized zirconia (YSZ, six to eight weight percent) through chemistry changes (doping). The overall technical approach of this project is focused on the development and evaluation of novel, multilayered/ composite TBC design architectures consisting of GZO and doped YSZ for improved relevant characteristics (reduction in thermal conductivity, erosion rate and sintering rate). The Phase I technical approach involved fabrication, characterization, and performance evaluation of the multilayered and monolayered TBC architectures. Electron beam physical vapor deposition (EBPVD) was utilized to fabricate monolayered and multilayered TBCs of the selected materials. Phase II of the project involves optimization of microstructure and design of the multi-layered TBCs, as well as fabrication and evaluation of composite TBCs fabricated by EBPVD and cost effective atmospheric plasma spray (APS) techniques. Fabricated TBCs are characterized in terms of microstructure, thermal conductivity, erosion resistance, sintering resistance under thermal gradient condition and thermal cycling tests.
One of the TBC architectures developed in Phase I.