Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications
Rare‐earth zirconates have been identified as a class of low‐thermal‐conductivity ceramics for possible use in thermal barrier coatings (TBCs) for gas‐turbine engine applications. To document and compare the thermal conductivities of important rare‐earth zirconates, we have measured the thermal cond...
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| Veröffentlicht in: | Journal of the American Ceramic Society 2002-12, Vol.85 (12), p.3031-3035 |
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| creator | Wu, Jie Wei, Xuezheng Padture, Nitin P. Klemens, Paul G. Gell, Maurice García, Eugenio Miranzo, Pilar Osendi, Maria I. |
| description | Rare‐earth zirconates have been identified as a class of low‐thermal‐conductivity ceramics for possible use in thermal barrier coatings (TBCs) for gas‐turbine engine applications. To document and compare the thermal conductivities of important rare‐earth zirconates, we have measured the thermal conductivities of the following hot‐pressed ceramics: (i) Gd2Zr2O7 (pyrochlore phase), (ii) Gd2Zr2O7 (fluorite phase), (iii) Gd2.58Zr1.57O7 (fluorite phase), (iv) Nd2Zr2O7 (pyrochlore phase), and (v) Sm2Zr2O7 (pyrochlore phase). We have also measured the thermal conductivity of pressureless‐sintered 7 wt% yttria‐stabilized zirconia (7YSZ)—the commonly used composition in current TBCs. All rare‐earth zirconates investigated here showed nearly identical thermal conductivities, all of which were ∼30% lower than the thermal conductivity of 7YSZ in the temperature range 25°–700°C. This finding is discussed qualitatively with reference to thermal‐conductivity theory. |
| doi_str_mv | 10.1111/j.1151-2916.2002.tb00574.x |
| format | Article |
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To document and compare the thermal conductivities of important rare‐earth zirconates, we have measured the thermal conductivities of the following hot‐pressed ceramics: (i) Gd2Zr2O7 (pyrochlore phase), (ii) Gd2Zr2O7 (fluorite phase), (iii) Gd2.58Zr1.57O7 (fluorite phase), (iv) Nd2Zr2O7 (pyrochlore phase), and (v) Sm2Zr2O7 (pyrochlore phase). We have also measured the thermal conductivity of pressureless‐sintered 7 wt% yttria‐stabilized zirconia (7YSZ)—the commonly used composition in current TBCs. All rare‐earth zirconates investigated here showed nearly identical thermal conductivities, all of which were ∼30% lower than the thermal conductivity of 7YSZ in the temperature range 25°–700°C. This finding is discussed qualitatively with reference to thermal‐conductivity theory.</description><identifier>ISSN: 0002-7820</identifier><identifier>EISSN: 1551-2916</identifier><identifier>DOI: 10.1111/j.1151-2916.2002.tb00574.x</identifier><identifier>CODEN: JACTAW</identifier><language>eng</language><publisher>Westerville, Ohio: American Ceramics Society</publisher><subject>Applied sciences ; barriers ; Building materials. Ceramics. Glasses ; Ceramic industries ; Chemical industry and chemicals ; coatings ; Exact sciences and technology ; Miscellaneous ; Technical ceramics ; thermal conductivity ; zirconate</subject><ispartof>Journal of the American Ceramic Society, 2002-12, Vol.85 (12), p.3031-3035</ispartof><rights>2003 INIST-CNRS</rights><rights>Copyright American Ceramic Society Dec 2002</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5411-85cbce1044e0c9dd29fda4e4430f8c894b3a54998719820543cc374f66f6fd953</citedby><cites>FETCH-LOGICAL-c5411-85cbce1044e0c9dd29fda4e4430f8c894b3a54998719820543cc374f66f6fd953</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.1151-2916.2002.tb00574.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1151-2916.2002.tb00574.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1416,27923,27924,45573,45574</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=14678078$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><contributor>WCA</contributor><creatorcontrib>Wu, Jie</creatorcontrib><creatorcontrib>Wei, Xuezheng</creatorcontrib><creatorcontrib>Padture, Nitin P.</creatorcontrib><creatorcontrib>Klemens, Paul G.</creatorcontrib><creatorcontrib>Gell, Maurice</creatorcontrib><creatorcontrib>García, Eugenio</creatorcontrib><creatorcontrib>Miranzo, Pilar</creatorcontrib><creatorcontrib>Osendi, Maria I.</creatorcontrib><title>Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications</title><title>Journal of the American Ceramic Society</title><description>Rare‐earth zirconates have been identified as a class of low‐thermal‐conductivity ceramics for possible use in thermal barrier coatings (TBCs) for gas‐turbine engine applications. To document and compare the thermal conductivities of important rare‐earth zirconates, we have measured the thermal conductivities of the following hot‐pressed ceramics: (i) Gd2Zr2O7 (pyrochlore phase), (ii) Gd2Zr2O7 (fluorite phase), (iii) Gd2.58Zr1.57O7 (fluorite phase), (iv) Nd2Zr2O7 (pyrochlore phase), and (v) Sm2Zr2O7 (pyrochlore phase). We have also measured the thermal conductivity of pressureless‐sintered 7 wt% yttria‐stabilized zirconia (7YSZ)—the commonly used composition in current TBCs. All rare‐earth zirconates investigated here showed nearly identical thermal conductivities, all of which were ∼30% lower than the thermal conductivity of 7YSZ in the temperature range 25°–700°C. This finding is discussed qualitatively with reference to thermal‐conductivity theory.</description><subject>Applied sciences</subject><subject>barriers</subject><subject>Building materials. Ceramics. Glasses</subject><subject>Ceramic industries</subject><subject>Chemical industry and chemicals</subject><subject>coatings</subject><subject>Exact sciences and technology</subject><subject>Miscellaneous</subject><subject>Technical ceramics</subject><subject>thermal conductivity</subject><subject>zirconate</subject><issn>0002-7820</issn><issn>1551-2916</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNqVkV-PEyEUxYnRZOvqd5hsom9UGGAAn6xN918a3Zjd7GZfCGXApU6HLlC3_fbLpFUTn5SXy839nXMhB4ATjMa4nA_LUhiGtcTNuEaoHucFQozT8fYFGGF2GL0EI1SGkIsaHYHXKS1Li6WgI6Dn4QleP9i40h2chr7dmOx_-ryrvulo4UzH_FDd-2hCr7NNlQuxugrZ9tnrrvol_Kxj9DYWA519_72arNedN-Ue-vQGvHK6S_btoR6Dm9PZ9fQczr-eXUwnc2gYxRgKZhbGYkSpRUa2bS1dq6mllCAnjJB0QTSjUgpeHl4jRokxhFPXNK5xrWTkGLzf-65jeNzYlNXKJ2O7Tvc2bJKqOeaD8p9AIZks4Mlf4DJsYl8-oeoB4YIO0Mc9ZGJIKVqn1tGvdNwpjNSQkVqqISM1BKGGjNQhI7Ut4neHDToZ3bmoe-PTHwfacIG4KNynPffkO7v7jw3qcjKdEURwsYB7C5-y3f620PGHajjhTN1-OVN3V6d37F7cKkSeAfb5tW4</recordid><startdate>200212</startdate><enddate>200212</enddate><creator>Wu, Jie</creator><creator>Wei, Xuezheng</creator><creator>Padture, Nitin P.</creator><creator>Klemens, Paul G.</creator><creator>Gell, Maurice</creator><creator>García, Eugenio</creator><creator>Miranzo, Pilar</creator><creator>Osendi, Maria I.</creator><general>American Ceramics Society</general><general>Blackwell</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>8BQ</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>200212</creationdate><title>Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications</title><author>Wu, Jie ; Wei, Xuezheng ; Padture, Nitin P. ; Klemens, Paul G. ; Gell, Maurice ; García, Eugenio ; Miranzo, Pilar ; Osendi, Maria I.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5411-85cbce1044e0c9dd29fda4e4430f8c894b3a54998719820543cc374f66f6fd953</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Applied sciences</topic><topic>barriers</topic><topic>Building materials. Ceramics. Glasses</topic><topic>Ceramic industries</topic><topic>Chemical industry and chemicals</topic><topic>coatings</topic><topic>Exact sciences and technology</topic><topic>Miscellaneous</topic><topic>Technical ceramics</topic><topic>thermal conductivity</topic><topic>zirconate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wu, Jie</creatorcontrib><creatorcontrib>Wei, Xuezheng</creatorcontrib><creatorcontrib>Padture, Nitin P.</creatorcontrib><creatorcontrib>Klemens, Paul G.</creatorcontrib><creatorcontrib>Gell, Maurice</creatorcontrib><creatorcontrib>García, Eugenio</creatorcontrib><creatorcontrib>Miranzo, Pilar</creatorcontrib><creatorcontrib>Osendi, Maria I.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>METADEX</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of the American Ceramic Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wu, Jie</au><au>Wei, Xuezheng</au><au>Padture, Nitin P.</au><au>Klemens, Paul G.</au><au>Gell, Maurice</au><au>García, Eugenio</au><au>Miranzo, Pilar</au><au>Osendi, Maria I.</au><au>WCA</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications</atitle><jtitle>Journal of the American Ceramic Society</jtitle><date>2002-12</date><risdate>2002</risdate><volume>85</volume><issue>12</issue><spage>3031</spage><epage>3035</epage><pages>3031-3035</pages><issn>0002-7820</issn><eissn>1551-2916</eissn><coden>JACTAW</coden><abstract>Rare‐earth zirconates have been identified as a class of low‐thermal‐conductivity ceramics for possible use in thermal barrier coatings (TBCs) for gas‐turbine engine applications. To document and compare the thermal conductivities of important rare‐earth zirconates, we have measured the thermal conductivities of the following hot‐pressed ceramics: (i) Gd2Zr2O7 (pyrochlore phase), (ii) Gd2Zr2O7 (fluorite phase), (iii) Gd2.58Zr1.57O7 (fluorite phase), (iv) Nd2Zr2O7 (pyrochlore phase), and (v) Sm2Zr2O7 (pyrochlore phase). We have also measured the thermal conductivity of pressureless‐sintered 7 wt% yttria‐stabilized zirconia (7YSZ)—the commonly used composition in current TBCs. All rare‐earth zirconates investigated here showed nearly identical thermal conductivities, all of which were ∼30% lower than the thermal conductivity of 7YSZ in the temperature range 25°–700°C. This finding is discussed qualitatively with reference to thermal‐conductivity theory.</abstract><cop>Westerville, Ohio</cop><pub>American Ceramics Society</pub><doi>10.1111/j.1151-2916.2002.tb00574.x</doi><tpages>5</tpages></addata></record> |
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| subjects | Applied sciences barriers Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals coatings Exact sciences and technology Miscellaneous Technical ceramics thermal conductivity zirconate |
| title | Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications |
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