DOI: 10.1111/j.1151-2916.2000.tb01506.x. Zirconates as New Materials for Thermal Barrier Coatings

Zirconates as New Materials for Thermal Barrier Coatings

10.1111/j.1151-2916.2000.tb01506.x

Crossref journal-article

Wiley

Journal of the American Ceramic Society (311)

Abstract

Zirconates with high melting points were investigated for application as materials for thermal barrier coatings at operating temperatures >1300°C. SrZrO3, BaZrO3, and La2Zr2O7 powders were synthesized and sintered to compacts with various levels of porosity. The sintering results indicated a promising low‐sintering activity of the investigated materials. Thermal properties of these dense materials were determined. Thermal expansion coefficients were slightly lower than those of Y2O3‐stabilized ZrO2 (YSZ); thermal conductivities of SrZrO3 and BaZrO3 were comparable or slightly higher than those of YSZ. La2Zr2O7 had a lower thermal conductivity. SrZrO3 was not suitable for application as a thermal barrier coating because of a phase transition at temperatures between 700° and 800°C. Mechanical properties (hardness, fracture toughness, and Young's modulus) of dense BaZrO3 and La2Zr2O7 samples were determined by indentation techniques and showed lower hardness and Young's modulus compared to YSZ. BaZrO3 and La2Zr2O7 powders were optimized for application as powders for plasma spraying. Plasma‐sprayed coatings were produced and characterized. Thermal cycling with a gas burner at 1200°C showed a massive attack of the BaZrO3 coating, with loss of BaO. On the other hand, the La2Zr2O7 coating showed excellent thermal stability and thermal shock behavior.

Bibliography

Vassen, R., Cao, X., Tietz, F., Basu, D., & StÃ¶ver, D. (2000). Zirconates as New Materials for Thermal Barrier Coatings. Journal of the American Ceramic Society, 83(8), 2023â2028. Portico.

Authors 5

Robert Vassen (first)
Xueqiang Cao (additional)
Frank Tietz (additional)
Debabrata Basu (additional)
Detlev Stöver (additional)

References 31 Referenced 1,196

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10.1111/j.1151-2916.1984.tb19162.x
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{'key': 'e_1_2_1_10_2', 'first-page': '1627', 'volume-title': 'Materials for Advanced Power Engineering.', 'author': 'Vassen R.', 'year': '1998'} / Materials for Advanced Power Engineering. by Vassen R. (1998)
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{'issue': '1', 'key': 'e_1_2_1_30_2', 'first-page': '68', 'article-title': 'Optimization of the Ni‐Cr‐Al‐Y/ZrO2–Y2O3Thermal Barrier System', 'volume': '1', 'author': 'Stecura S.', 'year': '1986', 'journal-title': 'Adv. Ceram. Mater.'} / Adv. Ceram. Mater. / Optimization of the Ni‐Cr‐Al‐Y/ZrO2–Y2O3Thermal Barrier System by Stecura S. (1986)
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Dates

Type	When
Created	15 years ago (July 24, 2010, 11:32 a.m.)
Deposited	1 year, 8 months ago (Nov. 22, 2023, 5:03 p.m.)
Indexed	2 hours, 11 minutes ago (Aug. 21, 2025, 12:47 p.m.)
Issued	25 years ago (Aug. 1, 2000)
Published	25 years ago (Aug. 1, 2000)
Published Online	20 years, 8 months ago (Dec. 20, 2004)
Published Print	25 years ago (Aug. 1, 2000)

Funders 0

None

BibTeX

@article{Vassen_2000, title={Zirconates as New Materials for Thermal Barrier Coatings}, volume={83}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/j.1151-2916.2000.tb01506.x}, DOI={10.1111/j.1151-2916.2000.tb01506.x}, number={8}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={Vassen, Robert and Cao, Xueqiang and Tietz, Frank and Basu, Debabrata and Stöver, Detlev}, year={2000}, month=aug, pages={2023–2028} }

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  "abstract": "<jats:p>Zirconates with high melting points were investigated for application as materials for thermal barrier coatings at operating temperatures &gt;1300\u00b0C. SrZrO<jats:sub>3</jats:sub>, BaZrO<jats:sub>3</jats:sub>, and La<jats:sub>2</jats:sub>Zr<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub> powders were synthesized and sintered to compacts with various levels of porosity. The sintering results indicated a promising low\u2010sintering activity of the investigated materials. Thermal properties of these dense materials were determined. Thermal expansion coefficients were slightly lower than those of Y<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>\u2010stabilized ZrO<jats:sub>2</jats:sub> (YSZ); thermal conductivities of SrZrO<jats:sub>3</jats:sub> and BaZrO<jats:sub>3</jats:sub> were comparable or slightly higher than those of YSZ. La<jats:sub>2</jats:sub>Zr<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub> had a lower thermal conductivity. SrZrO<jats:sub>3</jats:sub> was not suitable for application as a thermal barrier coating because of a phase transition at temperatures between 700\u00b0 and 800\u00b0C. Mechanical properties (hardness, fracture toughness, and Young's modulus) of dense BaZrO<jats:sub>3</jats:sub> and La<jats:sub>2</jats:sub>Zr<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub> samples were determined by indentation techniques and showed lower hardness and Young's modulus compared to YSZ. BaZrO<jats:sub>3</jats:sub> and La<jats:sub>2</jats:sub>Zr<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub> powders were optimized for application as powders for plasma spraying. Plasma\u2010sprayed coatings were produced and characterized. Thermal cycling with a gas burner at 1200\u00b0C showed a massive attack of the BaZrO<jats:sub>3</jats:sub> coating, with loss of BaO. On the other hand, the La<jats:sub>2</jats:sub>Zr<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub> coating showed excellent thermal stability and thermal shock behavior.</jats:p>",
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