Two-Step Sintering of Ceramics with Constant Grain-Size, I. Y2O3
Isothermal and constant‐grain‐size sintering have been carried out to full density in Y2O3 with and without dopants, at as low as 40% of the homologous temperature. The normalized densification rate follows Herring's scaling law with a universal geometric factor that depends only on density. Th...
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| Veröffentlicht in: | Journal of the American Ceramic Society 2006-02, Vol.89 (2), p.431-437 |
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| container_title | Journal of the American Ceramic Society |
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| creator | Wang, Xiao-Hui Chen, Pei-Lin Chen, I-Wei |
| description | Isothermal and constant‐grain‐size sintering have been carried out to full density in Y2O3 with and without dopants, at as low as 40% of the homologous temperature. The normalized densification rate follows Herring's scaling law with a universal geometric factor that depends only on density. The frozen grain structure, however, prevents pore relocation commonly assumed in the conventional sintering models, which fail to describe our data. Suppression of grain growth but not densification is consistent with a grain boundary network pinned by triple‐point junctions, which have a higher activation energy for migration than grain boundaries. Long transients in sintering and grain growth have provided further evidence of relaxation and threshold processes at the grain boundary/triple point. |
| doi_str_mv | 10.1111/j.1551-2916.2005.00763.x |
| format | Article |
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Y2O3</title><title>Journal of the American Ceramic Society</title><description>Isothermal and constant‐grain‐size sintering have been carried out to full density in Y2O3 with and without dopants, at as low as 40% of the homologous temperature. The normalized densification rate follows Herring's scaling law with a universal geometric factor that depends only on density. The frozen grain structure, however, prevents pore relocation commonly assumed in the conventional sintering models, which fail to describe our data. Suppression of grain growth but not densification is consistent with a grain boundary network pinned by triple‐point junctions, which have a higher activation energy for migration than grain boundaries. Long transients in sintering and grain growth have provided further evidence of relaxation and threshold processes at the grain boundary/triple point.</description><subject>Applied sciences</subject><subject>Building materials. Ceramics. Glasses</subject><subject>Ceramic industries</subject><subject>Ceramic sintering</subject><subject>Chemical industry and chemicals</subject><subject>Exact sciences and technology</subject><subject>Grain boundaries</subject><subject>Miscellaneous</subject><subject>Technical ceramics</subject><issn>0002-7820</issn><issn>1551-2916</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNpFkF9PwjAUxRujiYh-h8bENzf7Z1u7JyULIAbkAQzxqem2Tjthw3YE8NPbCcH7cu_NOTn35gcAxMjHrh5KH4ch9kiMI58gFPoIsYj6uzPQOQnnoIMQIh7jBF2CK2tLt-KYBx3wNN_W3qxRazjTVaOMrj5gXcBEGbnSmYVb3XzCpK5sI6sGDo3UlTfTP-oejnz4Tqb0GlwUcmnVzbF3wdugP0-evfF0OEp6Y08THlEvYHlRcIp5ynHKeMxSElLKSabiKMgQd--okKkcp0TFhPCMFzQtUsRjmeY8ymkX3B5y16b-3ijbiLLemMqdFASzOGQ8QM50dzRJm8llYWSVaSvWRq-k2QvMQkwcNOd7PPi2eqn2_zoSLVNRihadaNGJlqn4Yyp24qWX9P9ml-AdErRt1O6UIM2XiBhloVi8DgVjaDKJFnMxoL8o73iw</recordid><startdate>200602</startdate><enddate>200602</enddate><creator>Wang, Xiao-Hui</creator><creator>Chen, Pei-Lin</creator><creator>Chen, I-Wei</creator><general>Blackwell Science Inc</general><general>Blackwell</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>IQODW</scope><scope>7QQ</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>200602</creationdate><title>Two-Step Sintering of Ceramics with Constant Grain-Size, I. 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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Applied sciences Building materials. Ceramics. Glasses Ceramic industries Ceramic sintering Chemical industry and chemicals Exact sciences and technology Grain boundaries Miscellaneous Technical ceramics |
| title | Two-Step Sintering of Ceramics with Constant Grain-Size, I. Y2O3 |
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