Toughening of Nontransformable t′-YSZ by Addition of Titania
Substitution of TiO2 for ZrO2 into single‐phase tetragonal (t′) 7YSZ has been shown to induce a twofold increase in toughness. This enhancement has been achieved by increasing the tetragonality of the unit cell, upon substituting Ti4+ for the larger Zr4+ cation. The observed behavior is consistent w...
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| Veröffentlicht in: | Journal of the American Ceramic Society 2007-12, Vol.90 (12), p.3896-3901 |
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| container_title | Journal of the American Ceramic Society |
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| creator | Schaedler, Tobias A. Leckie, Rafael M. Krämer, Stephan Evans, Anthony G. Levi, Carlos G. |
| description | Substitution of TiO2 for ZrO2 into single‐phase tetragonal (t′) 7YSZ has been shown to induce a twofold increase in toughness. This enhancement has been achieved by increasing the tetragonality of the unit cell, upon substituting Ti4+ for the larger Zr4+ cation. The observed behavior is consistent with ferroelastic toughening, but direct evidence of the mechanism is lacking. Adding TiO2 to 7YSZ has the additional benefit that it diminishes the transformability of the depleted tetragonal form: specifically, no monoclinic phase was observed even after equilibration at 1600°C, followed by low‐temperature annealing. The combination of properties bodes well for potential application as a thermal barrier coating in gas turbine engines. |
| doi_str_mv | 10.1111/j.1551-2916.2007.01990.x |
| format | Article |
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This enhancement has been achieved by increasing the tetragonality of the unit cell, upon substituting Ti4+ for the larger Zr4+ cation. The observed behavior is consistent with ferroelastic toughening, but direct evidence of the mechanism is lacking. Adding TiO2 to 7YSZ has the additional benefit that it diminishes the transformability of the depleted tetragonal form: specifically, no monoclinic phase was observed even after equilibration at 1600°C, followed by low‐temperature annealing. The combination of properties bodes well for potential application as a thermal barrier coating in gas turbine engines.</description><identifier>ISSN: 0002-7820</identifier><identifier>EISSN: 1551-2916</identifier><identifier>DOI: 10.1111/j.1551-2916.2007.01990.x</identifier><identifier>CODEN: JACTAW</identifier><language>eng</language><publisher>Malden, USA: Blackwell Publishing Inc</publisher><subject>Annealing ; Applied sciences ; Building materials. Ceramics. 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This enhancement has been achieved by increasing the tetragonality of the unit cell, upon substituting Ti4+ for the larger Zr4+ cation. The observed behavior is consistent with ferroelastic toughening, but direct evidence of the mechanism is lacking. Adding TiO2 to 7YSZ has the additional benefit that it diminishes the transformability of the depleted tetragonal form: specifically, no monoclinic phase was observed even after equilibration at 1600°C, followed by low‐temperature annealing. The combination of properties bodes well for potential application as a thermal barrier coating in gas turbine engines.</description><subject>Annealing</subject><subject>Applied sciences</subject><subject>Building materials. Ceramics. Glasses</subject><subject>Ceramic industries</subject><subject>Ceramics</subject><subject>Chemical industry and chemicals</subject><subject>Exact sciences and technology</subject><subject>Gas turbine engines</subject><subject>Structural ceramics</subject><subject>Technical ceramics</subject><subject>Temperature</subject><subject>Titanium</subject><issn>0002-7820</issn><issn>1551-2916</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqNkN1u0zAYQK2JSSuFd4iQxl0y_8SxfTPUlW2ApoG2TgNurK-OM1zSeNipaO94Jh6JJ5nTTkPiCsuSbfn4yDoIZQQXJI2jRUE4JzlVpCooxqLARClcrPfQ6OniGRphjGkuJMUH6HmMi3QkSpYjdDzzq7tvtnPdXeab7NJ3fYAuNj4sYd7arP_z63f-5fprNt9kk7p2vfPdAM5cD52DF2i_gTbal4_rGN2cnc6m7_KLj-fvp5OL3JQlwbmopAErOAhcN4wyWhsq61JVlBPDZcOt5XMQygBUBqQiAkht5jVwKlhVYzZGr3fe--B_rGzs9dJFY9sWOutXUTNGJCYJHqNX_4ALvwpd-pumRKhSlltI7iATfIzBNvo-uCWEjSZYD1X1Qg_x9BBPD1X1tqpep6eHj36IBtomxTIu_n2vFEuTJ-7NjvvpWrv5b7_-MJmebvfJkO8MLvZ2_WSA8F1Xggmuby_PtXh7oj59plf6hD0AT4CZoA</recordid><startdate>200712</startdate><enddate>200712</enddate><creator>Schaedler, Tobias A.</creator><creator>Leckie, Rafael M.</creator><creator>Krämer, Stephan</creator><creator>Evans, Anthony G.</creator><creator>Levi, Carlos G.</creator><general>Blackwell Publishing Inc</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></search><sort><creationdate>200712</creationdate><title>Toughening of Nontransformable t′-YSZ by Addition of Titania</title><author>Schaedler, Tobias A. ; Leckie, Rafael M. ; Krämer, Stephan ; Evans, Anthony G. ; Levi, Carlos G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4410-768cae75a70df3232dc28d496251c58f5ee5ba79caa6ca8917a1dcbda52736d03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Annealing</topic><topic>Applied sciences</topic><topic>Building materials. Ceramics. Glasses</topic><topic>Ceramic industries</topic><topic>Ceramics</topic><topic>Chemical industry and chemicals</topic><topic>Exact sciences and technology</topic><topic>Gas turbine engines</topic><topic>Structural ceramics</topic><topic>Technical ceramics</topic><topic>Temperature</topic><topic>Titanium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Schaedler, Tobias A.</creatorcontrib><creatorcontrib>Leckie, Rafael M.</creatorcontrib><creatorcontrib>Krämer, Stephan</creatorcontrib><creatorcontrib>Evans, Anthony G.</creatorcontrib><creatorcontrib>Levi, Carlos G.</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><jtitle>Journal of the American Ceramic Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Schaedler, Tobias A.</au><au>Leckie, Rafael M.</au><au>Krämer, Stephan</au><au>Evans, Anthony G.</au><au>Levi, Carlos G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Toughening of Nontransformable t′-YSZ by Addition of Titania</atitle><jtitle>Journal of the American Ceramic Society</jtitle><date>2007-12</date><risdate>2007</risdate><volume>90</volume><issue>12</issue><spage>3896</spage><epage>3901</epage><pages>3896-3901</pages><issn>0002-7820</issn><eissn>1551-2916</eissn><coden>JACTAW</coden><abstract>Substitution of TiO2 for ZrO2 into single‐phase tetragonal (t′) 7YSZ has been shown to induce a twofold increase in toughness. This enhancement has been achieved by increasing the tetragonality of the unit cell, upon substituting Ti4+ for the larger Zr4+ cation. The observed behavior is consistent with ferroelastic toughening, but direct evidence of the mechanism is lacking. Adding TiO2 to 7YSZ has the additional benefit that it diminishes the transformability of the depleted tetragonal form: specifically, no monoclinic phase was observed even after equilibration at 1600°C, followed by low‐temperature annealing. The combination of properties bodes well for potential application as a thermal barrier coating in gas turbine engines.</abstract><cop>Malden, USA</cop><pub>Blackwell Publishing Inc</pub><doi>10.1111/j.1551-2916.2007.01990.x</doi><tpages>6</tpages></addata></record> |
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| source | Wiley Online Library All Journals |
| subjects | Annealing Applied sciences Building materials. Ceramics. Glasses Ceramic industries Ceramics Chemical industry and chemicals Exact sciences and technology Gas turbine engines Structural ceramics Technical ceramics Temperature Titanium |
| title | Toughening of Nontransformable t′-YSZ by Addition of Titania |
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