Highly defective oxides as sinter resistant thermal barrier coating
Patent
·
OSTI ID:1175466
A thermal barrier coating material formed of a highly defective cubic matrix structure having a concentration of a stabilizer sufficiently high that the oxygen vacancies created by the stabilizer interact within the matrix to form multi-vacancies, thereby improving the sintering resistance of the material. The concentration of stabilizer within the cubic matrix structure is greater than that concentration of stabilizer necessary to give the matrix a peak ionic conductivity value. The concentration of stabilizer may be at least 30 wt. %. Embodiments include a cubic matrix of zirconia stabilized by at least 30-50 wt. % yttria, and a cubic matrix of hafnia stabilized by at least 30-50 wt. % gadolinia.
- Research Organization:
- Siemens Westinghouse Power Corporation, Orlando, FL, (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC21-95MC32267
- Assignee:
- Siemens Westinghouse Power Corporation
- Patent Number(s):
- 6,930,066
- Application Number:
- 10/010,676
- OSTI ID:
- 1175466
- Country of Publication:
- United States
- Language:
- English
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