Microstructure and mechanical properties of the in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite
The in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite was studied along the Si[sub 3]N[sub 4]-Y[sub 2]O[sub 3]:9AlN composition line. This two-phase composite was fully densified at 1,780 C by hot pressing. Densification curves and phase developments of the [beta]-Si[sub 3]N[sub 4]/[a...
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| Veröffentlicht in: | Journal of the American Ceramic Society 1994-09, Vol.77:9 |
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| container_title | Journal of the American Ceramic Society |
| container_volume | 77:9 |
| creator | Sheu, T.S. |
| description | The in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite was studied along the Si[sub 3]N[sub 4]-Y[sub 2]O[sub 3]:9AlN composition line. This two-phase composite was fully densified at 1,780 C by hot pressing. Densification curves and phase developments of the [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite were found to vary with composition. Because of the cooperative formation of [alpha][prime]-SiAlON and [beta]-Si[sub 3]N[sub 4] during its phase development, this composite had equiaxed [alpha][prime]-SiAlON ([approximately]0.2 [mu]m) and elongated [beta]-Si[sub 3]N[sub 4] fine grains. The optimum mechanical properties of this two-phase composite were in the sample with 30--40% [alpha][prime], which had a flexural strength of 1100 MPa at 25 C, 800 MPa at 1,400 C in air, and a fracture toughness 6 MPa[center dot]m[sup 1/2]. [alpha][prime]-SiAlON grains were equiaxed under a sintering condition at 1,780 C or lower temperatures. Morphologies of the [alpha][prime]-SiAlON grains were affected by the sintering conditions. |
| doi_str_mv | 10.1111/j.1151-2916.1994.tb04604.x |
| format | Article |
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This two-phase composite was fully densified at 1,780 C by hot pressing. Densification curves and phase developments of the [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite were found to vary with composition. Because of the cooperative formation of [alpha][prime]-SiAlON and [beta]-Si[sub 3]N[sub 4] during its phase development, this composite had equiaxed [alpha][prime]-SiAlON ([approximately]0.2 [mu]m) and elongated [beta]-Si[sub 3]N[sub 4] fine grains. The optimum mechanical properties of this two-phase composite were in the sample with 30--40% [alpha][prime], which had a flexural strength of 1100 MPa at 25 C, 800 MPa at 1,400 C in air, and a fracture toughness 6 MPa[center dot]m[sup 1/2]. [alpha][prime]-SiAlON grains were equiaxed under a sintering condition at 1,780 C or lower temperatures. Morphologies of the [alpha][prime]-SiAlON grains were affected by the sintering conditions.</description><identifier>ISSN: 0002-7820</identifier><identifier>EISSN: 1551-2916</identifier><identifier>DOI: 10.1111/j.1151-2916.1994.tb04604.x</identifier><language>eng</language><publisher>United States</publisher><subject>360603 -- Materials-- Properties ; ALUMINIUM COMPOUNDS ; ALUMINIUM OXIDES ; CHALCOGENIDES ; COMPACTING ; COMPOSITE MATERIALS ; DATA ; EXPERIMENTAL DATA ; FRACTURE PROPERTIES ; INFORMATION ; MATERIALS ; MATERIALS SCIENCE ; MECHANICAL PROPERTIES ; MICROSTRUCTURE ; NITRIDES ; NITROGEN COMPOUNDS ; NUMERICAL DATA ; OXIDES ; OXYGEN COMPOUNDS ; PNICTIDES ; SILICON COMPOUNDS 360602 -- Other Materials-- Structure & Phase Studies ; SILICON NITRIDES</subject><ispartof>Journal of the American Ceramic Society, 1994-09, Vol.77:9</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27903,27904</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/6932188$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Sheu, T.S.</creatorcontrib><title>Microstructure and mechanical properties of the in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite</title><title>Journal of the American Ceramic Society</title><description>The in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite was studied along the Si[sub 3]N[sub 4]-Y[sub 2]O[sub 3]:9AlN composition line. This two-phase composite was fully densified at 1,780 C by hot pressing. Densification curves and phase developments of the [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite were found to vary with composition. Because of the cooperative formation of [alpha][prime]-SiAlON and [beta]-Si[sub 3]N[sub 4] during its phase development, this composite had equiaxed [alpha][prime]-SiAlON ([approximately]0.2 [mu]m) and elongated [beta]-Si[sub 3]N[sub 4] fine grains. The optimum mechanical properties of this two-phase composite were in the sample with 30--40% [alpha][prime], which had a flexural strength of 1100 MPa at 25 C, 800 MPa at 1,400 C in air, and a fracture toughness 6 MPa[center dot]m[sup 1/2]. [alpha][prime]-SiAlON grains were equiaxed under a sintering condition at 1,780 C or lower temperatures. Morphologies of the [alpha][prime]-SiAlON grains were affected by the sintering conditions.</description><subject>360603 -- Materials-- Properties</subject><subject>ALUMINIUM COMPOUNDS</subject><subject>ALUMINIUM OXIDES</subject><subject>CHALCOGENIDES</subject><subject>COMPACTING</subject><subject>COMPOSITE MATERIALS</subject><subject>DATA</subject><subject>EXPERIMENTAL DATA</subject><subject>FRACTURE PROPERTIES</subject><subject>INFORMATION</subject><subject>MATERIALS</subject><subject>MATERIALS SCIENCE</subject><subject>MECHANICAL PROPERTIES</subject><subject>MICROSTRUCTURE</subject><subject>NITRIDES</subject><subject>NITROGEN COMPOUNDS</subject><subject>NUMERICAL DATA</subject><subject>OXIDES</subject><subject>OXYGEN COMPOUNDS</subject><subject>PNICTIDES</subject><subject>SILICON COMPOUNDS 360602 -- Other Materials-- Structure & Phase Studies</subject><subject>SILICON NITRIDES</subject><issn>0002-7820</issn><issn>1551-2916</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1994</creationdate><recordtype>article</recordtype><recordid>eNqNjs1KxDAUhYMoWH_e4TL7dpI2U5uliOLGcaG7Uob0eodmaJOQpODjG2UewLv5OJzvwGVsI3gl8m1PGTtR1kq0lVBKVmnksuWy-r5ghdidq0tWcM7r8qGr-TW7ifGUo1CdLJh_MxhcTGHFtAYCbb9gIZy0Nahn8MF5CslQBHeENBEYC9GkFfqRkh7KD9PHdYRm2P9RDttez37SQ--DWehXeJzf94Bu8S4P6Y5dHfUc6f7MW7Z5ef58ei3zE-YQMSs4obOWMB1a1dSi65p_ST8x-FN6</recordid><startdate>19940901</startdate><enddate>19940901</enddate><creator>Sheu, T.S.</creator><scope>OTOTI</scope></search><sort><creationdate>19940901</creationdate><title>Microstructure and mechanical properties of the in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite</title><author>Sheu, T.S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-osti_scitechconnect_69321883</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1994</creationdate><topic>360603 -- Materials-- Properties</topic><topic>ALUMINIUM COMPOUNDS</topic><topic>ALUMINIUM OXIDES</topic><topic>CHALCOGENIDES</topic><topic>COMPACTING</topic><topic>COMPOSITE MATERIALS</topic><topic>DATA</topic><topic>EXPERIMENTAL DATA</topic><topic>FRACTURE PROPERTIES</topic><topic>INFORMATION</topic><topic>MATERIALS</topic><topic>MATERIALS SCIENCE</topic><topic>MECHANICAL PROPERTIES</topic><topic>MICROSTRUCTURE</topic><topic>NITRIDES</topic><topic>NITROGEN COMPOUNDS</topic><topic>NUMERICAL DATA</topic><topic>OXIDES</topic><topic>OXYGEN COMPOUNDS</topic><topic>PNICTIDES</topic><topic>SILICON COMPOUNDS 360602 -- Other Materials-- Structure & Phase Studies</topic><topic>SILICON NITRIDES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sheu, T.S.</creatorcontrib><collection>OSTI.GOV</collection><jtitle>Journal of the American Ceramic Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sheu, T.S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microstructure and mechanical properties of the in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite</atitle><jtitle>Journal of the American Ceramic Society</jtitle><date>1994-09-01</date><risdate>1994</risdate><volume>77:9</volume><issn>0002-7820</issn><eissn>1551-2916</eissn><abstract>The in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite was studied along the Si[sub 3]N[sub 4]-Y[sub 2]O[sub 3]:9AlN composition line. This two-phase composite was fully densified at 1,780 C by hot pressing. Densification curves and phase developments of the [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite were found to vary with composition. Because of the cooperative formation of [alpha][prime]-SiAlON and [beta]-Si[sub 3]N[sub 4] during its phase development, this composite had equiaxed [alpha][prime]-SiAlON ([approximately]0.2 [mu]m) and elongated [beta]-Si[sub 3]N[sub 4] fine grains. The optimum mechanical properties of this two-phase composite were in the sample with 30--40% [alpha][prime], which had a flexural strength of 1100 MPa at 25 C, 800 MPa at 1,400 C in air, and a fracture toughness 6 MPa[center dot]m[sup 1/2]. [alpha][prime]-SiAlON grains were equiaxed under a sintering condition at 1,780 C or lower temperatures. Morphologies of the [alpha][prime]-SiAlON grains were affected by the sintering conditions.</abstract><cop>United States</cop><doi>10.1111/j.1151-2916.1994.tb04604.x</doi></addata></record> |
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| ispartof | Journal of the American Ceramic Society, 1994-09, Vol.77:9 |
| issn | 0002-7820 1551-2916 |
| language | eng |
| recordid | cdi_osti_scitechconnect_6932188 |
| source | Wiley Online Library Journals Frontfile Complete |
| subjects | 360603 -- Materials-- Properties ALUMINIUM COMPOUNDS ALUMINIUM OXIDES CHALCOGENIDES COMPACTING COMPOSITE MATERIALS DATA EXPERIMENTAL DATA FRACTURE PROPERTIES INFORMATION MATERIALS MATERIALS SCIENCE MECHANICAL PROPERTIES MICROSTRUCTURE NITRIDES NITROGEN COMPOUNDS NUMERICAL DATA OXIDES OXYGEN COMPOUNDS PNICTIDES SILICON COMPOUNDS 360602 -- Other Materials-- Structure & Phase Studies SILICON NITRIDES |
| title | Microstructure and mechanical properties of the in situ [beta]-Si[sub 3]N[sub 4]/[alpha][prime]-SiAlON composite |
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