Zirconates as New Materials for Thermal Barrier Coatings
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 prom...
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creator | Vassen, Robert Cao, Xueqiang Tietz, Frank Basu, Debabrata Stöver, Detlev |
description | 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. |
doi_str_mv | 10.1111/j.1151-2916.2000.tb01506.x |
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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.</description><identifier>ISSN: 0002-7820</identifier><identifier>EISSN: 1551-2916</identifier><identifier>DOI: 10.1111/j.1151-2916.2000.tb01506.x</identifier><identifier>CODEN: JACTAW</identifier><language>eng</language><publisher>Westerville, Ohio: American Ceramics Society</publisher><subject>coatings ; thermal properties ; zirconate</subject><ispartof>Journal of the American Ceramic Society, 2000-08, Vol.83 (8), p.2023-2028</ispartof><rights>Copyright American Ceramic Society Aug 2000</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5113-ff15ca916f75f80488509a87dfc564c5170c49b96dfc64af218953fb781057e83</citedby><cites>FETCH-LOGICAL-c5113-ff15ca916f75f80488509a87dfc564c5170c49b96dfc64af218953fb781057e83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1151-2916.2000.tb01506.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1151-2916.2000.tb01506.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Vassen, Robert</creatorcontrib><creatorcontrib>Cao, Xueqiang</creatorcontrib><creatorcontrib>Tietz, Frank</creatorcontrib><creatorcontrib>Basu, Debabrata</creatorcontrib><creatorcontrib>Stöver, Detlev</creatorcontrib><title>Zirconates as New Materials for Thermal Barrier Coatings</title><title>Journal of the American Ceramic Society</title><description>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.</description><subject>coatings</subject><subject>thermal properties</subject><subject>zirconate</subject><issn>0002-7820</issn><issn>1551-2916</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqVkM1OwzAQhC0EEqXwDlEP3FJsJ45tTpSqP6BSECqqxGXlBhsS0qbYqdq-PY5SceAEvqx295vRehDqENwl_l3lvjASUkmSLsUYd6sFJgwn3d0RahF2WB2jlt_RkAuKT9GZc7lviRRxC4nXzKblSlXaBcoFU70NHnxjM1W4wJQ2mH1ou1RFcKuszbQN-qWqstW7O0cnxjP64lDb6GU4mPXH4eRxdNfvTcKUERKFxhCWKn-D4cwIHAvBsFSCv5mUJbFnOE5juZCJHySxMpQIySKz4IJgxrWI2uiy8V3b8mujXQXLzKW6KNRKlxsHNEko4xH9G8iiyIOdX2BebuzKfwIo4RJjJrCHrhsotaVzVhtY22yp7B4Ihjp6yKGOHup8oY4eDtHDzotvGvE2K_T-H0q47_UHFNP6yLCxyFyldz8Wyn5CwiPOYD4dwTN_Gt6O5xJk9A34Apg6</recordid><startdate>200008</startdate><enddate>200008</enddate><creator>Vassen, Robert</creator><creator>Cao, Xueqiang</creator><creator>Tietz, Frank</creator><creator>Basu, Debabrata</creator><creator>Stöver, Detlev</creator><general>American Ceramics Society</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>H8D</scope><scope>L7M</scope><scope>8BQ</scope></search><sort><creationdate>200008</creationdate><title>Zirconates as New Materials for Thermal Barrier Coatings</title><author>Vassen, Robert ; Cao, Xueqiang ; Tietz, Frank ; Basu, Debabrata ; Stöver, Detlev</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5113-ff15ca916f75f80488509a87dfc564c5170c49b96dfc64af218953fb781057e83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>coatings</topic><topic>thermal properties</topic><topic>zirconate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vassen, Robert</creatorcontrib><creatorcontrib>Cao, Xueqiang</creatorcontrib><creatorcontrib>Tietz, Frank</creatorcontrib><creatorcontrib>Basu, Debabrata</creatorcontrib><creatorcontrib>Stöver, Detlev</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>METADEX</collection><jtitle>Journal of the American Ceramic Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Vassen, Robert</au><au>Cao, Xueqiang</au><au>Tietz, Frank</au><au>Basu, Debabrata</au><au>Stöver, Detlev</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Zirconates as New Materials for Thermal Barrier Coatings</atitle><jtitle>Journal of the American Ceramic Society</jtitle><date>2000-08</date><risdate>2000</risdate><volume>83</volume><issue>8</issue><spage>2023</spage><epage>2028</epage><pages>2023-2028</pages><issn>0002-7820</issn><eissn>1551-2916</eissn><coden>JACTAW</coden><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.</abstract><cop>Westerville, Ohio</cop><pub>American Ceramics Society</pub><doi>10.1111/j.1151-2916.2000.tb01506.x</doi><tpages>6</tpages></addata></record> |
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subjects | coatings thermal properties zirconate |
title | Zirconates as New Materials for Thermal Barrier Coatings |
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