Formation of AlN-Polytypoid Phases during α-SiAlON Decomposition
Phase transformations from α– to ß–SiAlONs (i.e., from α′ to ß′) have been recently reported in a number of rare‐earth SiAlON systems during postsintering heat treatment. In the present work, this transformation process in a Sm (α+ß)‐SiAlON material is studied by using XRD, TEM, and EDS X‐ray mappin...
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Veröffentlicht in: | Journal of the American Ceramic Society 1997-09, Vol.80 (9), p.2459-2463 |
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creator | Zhao, Rupeng Swenser, Steven P. Cheng, Yi-Bing |
description | Phase transformations from α– to ß–SiAlONs (i.e., from α′ to ß′) have been recently reported in a number of rare‐earth SiAlON systems during postsintering heat treatment. In the present work, this transformation process in a Sm (α+ß)‐SiAlON material is studied by using XRD, TEM, and EDS X‐ray mapping techniques. It is observed that in addition to the formation of ß′ and M′ phases, the α′‐to‐ß′ transformation is accompanied by a significant increase in the amount of an AlN‐polytypoid phase. The results suggest that some α′ phases are thermodynamically unstable at temperatures lower than the material sintering temperature and will decompose when conditions allow. For the composition studied in this work, the α‐SiAlON decomposition can be described in general as α′→ß′+ M′+ AlN polytypoid. |
doi_str_mv | 10.1111/j.1151-2916.1997.tb03145.x |
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In the present work, this transformation process in a Sm (α+ß)‐SiAlON material is studied by using XRD, TEM, and EDS X‐ray mapping techniques. It is observed that in addition to the formation of ß′ and M′ phases, the α′‐to‐ß′ transformation is accompanied by a significant increase in the amount of an AlN‐polytypoid phase. The results suggest that some α′ phases are thermodynamically unstable at temperatures lower than the material sintering temperature and will decompose when conditions allow. For the composition studied in this work, the α‐SiAlON decomposition can be described in general as α′→ß′+ M′+ AlN polytypoid.</description><identifier>ISSN: 0002-7820</identifier><identifier>EISSN: 1551-2916</identifier><identifier>DOI: 10.1111/j.1151-2916.1997.tb03145.x</identifier><identifier>CODEN: JACTAW</identifier><language>eng</language><publisher>Westerville, Ohio: American Ceramics Society</publisher><subject>Applied sciences ; Building materials. Ceramics. 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In the present work, this transformation process in a Sm (α+ß)‐SiAlON material is studied by using XRD, TEM, and EDS X‐ray mapping techniques. It is observed that in addition to the formation of ß′ and M′ phases, the α′‐to‐ß′ transformation is accompanied by a significant increase in the amount of an AlN‐polytypoid phase. The results suggest that some α′ phases are thermodynamically unstable at temperatures lower than the material sintering temperature and will decompose when conditions allow. For the composition studied in this work, the α‐SiAlON decomposition can be described in general as α′→ß′+ M′+ AlN polytypoid.</description><subject>Applied sciences</subject><subject>Building materials. Ceramics. Glasses</subject><subject>Ceramic industries</subject><subject>Chemical industry and chemicals</subject><subject>Exact sciences and technology</subject><subject>Structural ceramics</subject><subject>Technical ceramics</subject><issn>0002-7820</issn><issn>1551-2916</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><recordid>eNqVkMtOAjEUhhujiXh5h4kx7gbbTi_UlRMEFQmSqNFdUzqtFgeK7RDhsXwRn8mZQFxrNyc9_S_NB8AJgm1Un_NpPShKsUCsjYTg7WoCM0Roe7UDWohun3ZBC0KIU97BcB8cxDitr0h0SAvkfR9mqnJ-nnib5OUoHftyXa0X3hXJ-E1FE5NiGdz8Nfn-Sh9cXt6Pkiuj_Wzho2t8R2DPqjKa4-08BE_93mP3Jh3eX99282GqCeEiLdhEM0NoMbFZvWFcKEMLizWbQIMtMdAaKBg3WHHFOEGcE2IQ1zpjVjGRHYKzTe4i-I-liZWcuahNWaq58csoMaO1BcO_CCknrFMLLzZCHXyMwVi5CG6mwloiKBu8ciobvLJhKBu8cotXrmrz6bZFRa1KG9Rcu_ibgDuormh-fbmRfbrSrP9RIAd5t4cJbSLSTYSLlVn9RqjwLhnPOJXPo2s5pg93L0T05SD7AZqOnsU</recordid><startdate>199709</startdate><enddate>199709</enddate><creator>Zhao, Rupeng</creator><creator>Swenser, Steven P.</creator><creator>Cheng, Yi-Bing</creator><general>American Ceramics Society</general><general>Blackwell</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>199709</creationdate><title>Formation of AlN-Polytypoid Phases during α-SiAlON Decomposition</title><author>Zhao, Rupeng ; Swenser, Steven P. ; Cheng, Yi-Bing</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4479-d6bc6e45dbf3c44679ae5df2c6b0e2f4e0fe0967e2a7a67417744e17cc36fa693</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Applied sciences</topic><topic>Building materials. 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Glasses</topic><topic>Ceramic industries</topic><topic>Chemical industry and chemicals</topic><topic>Exact sciences and technology</topic><topic>Structural ceramics</topic><topic>Technical ceramics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhao, Rupeng</creatorcontrib><creatorcontrib>Swenser, Steven P.</creatorcontrib><creatorcontrib>Cheng, Yi-Bing</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</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><jtitle>Journal of the American Ceramic Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhao, Rupeng</au><au>Swenser, Steven P.</au><au>Cheng, Yi-Bing</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Formation of AlN-Polytypoid Phases during α-SiAlON Decomposition</atitle><jtitle>Journal of the American Ceramic Society</jtitle><date>1997-09</date><risdate>1997</risdate><volume>80</volume><issue>9</issue><spage>2459</spage><epage>2463</epage><pages>2459-2463</pages><issn>0002-7820</issn><eissn>1551-2916</eissn><coden>JACTAW</coden><abstract>Phase transformations from α– to ß–SiAlONs (i.e., from α′ to ß′) have been recently reported in a number of rare‐earth SiAlON systems during postsintering heat treatment. In the present work, this transformation process in a Sm (α+ß)‐SiAlON material is studied by using XRD, TEM, and EDS X‐ray mapping techniques. It is observed that in addition to the formation of ß′ and M′ phases, the α′‐to‐ß′ transformation is accompanied by a significant increase in the amount of an AlN‐polytypoid phase. The results suggest that some α′ phases are thermodynamically unstable at temperatures lower than the material sintering temperature and will decompose when conditions allow. For the composition studied in this work, the α‐SiAlON decomposition can be described in general as α′→ß′+ M′+ AlN polytypoid.</abstract><cop>Westerville, Ohio</cop><pub>American Ceramics Society</pub><doi>10.1111/j.1151-2916.1997.tb03145.x</doi><tpages>5</tpages></addata></record> |
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subjects | Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Exact sciences and technology Structural ceramics Technical ceramics |
title | Formation of AlN-Polytypoid Phases during α-SiAlON Decomposition |
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